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Body
Interior
Interior design
The interior design in the new model series 451 has a considerably more classic and harmonic look than in the predecessor model series 450. This is helped by the lines of the instrument panel, the door linings and the seats shaped to match. The harmonized color scheme of the interior also gives a positive impression in combination with the passenger compartment as a whole. The interior compartment has a more classic look while still displaying modern, typical smart features. This well balanced overall concept helps the smart fortwo create an exclusive overall impression with much higher perceived quality.
P68.00 4671 00
Shown on the smart coupé passion
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Introduction of the smart fortwo, Model Series 451
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Interior
Instrument panel
The instrument panel of the new smart fortwo has been totally redesigned compared with the prede cessor model series, primarily in favor of even higher standards of passenger safety. The instrument panel is straight and combines with airbags and knee bolsters for added passive safety. Its new shape is more ergonomic and more clearly arranged. The add on elements, such as the additional tachom eter and clock instruments, have been preserved (standard in the pulse). The ventilation outlets are no longer spherical, but drum shaped.
P68.10 3687 00
Shown on the smart coupé passion
Introduction of the smart fortwo, Model Series 451
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Body
Body
Interior
Instrument cluster
The new instrument cluster in the smart fortwo has been modified completely. In the center of the instrument cluster is the speed ometer scale with the multifunction display under neath. On each side is a strip with indicators and warning displays, as well as the control buttons for the multi function display. The task of the instrument cluster is to provide the driver with information about the various operating states and to provide acoustic or visual warnings in the event of critical operating conditions.It is the display unit for the vehicle speed and for other systems. In addition, the instrument cluster computes the maintenance intervals and shows them in the multifunction display. The instrument cluster is a device on the data bus/CAN bus in the overall network. Most of the signals are transmitted or received over CAN. Only the signals from the outside temperature display temperature sensor and the fanfare horns and airbag clock spring contact are linked to the instrument cluster via direct lines. The vehicle speed is displayed by an electronic speedometer that is driven by a stepper motor. The ESP control unit reads the information for the speed display from the wheel speed sensors in the form of signals, and forwards it over CAN to the instrument cluster. The instrument cluster processes the incoming signals and uses them to calculate the vehicle speed.
Multifunction display The task of the multifunction display is to provide the driver with information about variable changes in the vehicle, the ambient conditions and the road. The variable displays include: • • • • • • • • • • • Outside temperature Main odometer Trip odometer Gear indicator (in softip mode) Automatic transmission display (in softouch mode (special equipment)) Remaining fuel display Maintenance interval display with symbol Fuel level and reserve indicator Coolant temperature gauge Frost warning symbol Clock
P54.30 9526 00
Multifunction display
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Interior
P54.30 9527 00
Instrument cluster in vehicle variant with diesel engine
1 2
Left button, select multiple display / set clock Right button, instrument illumination / set clock Instrument cluster Left turn signal indicator lamp Right turn signal indicator lamp High beam indicator lamp Alternator charge monitoring and warning lamp Brake fluid and parking brake warning lamp
A1 A1e1 A1e2 A1e3 A1e5 A1e7
A1e9 A1e15 A1e16 A1e17 A1e26 A1e30 A1e41 A1e52 A1e54 A1e67 A1p8 A1p13
Seat belt warning lamp Airbag indicator and warning lamp Preglow indicator lamp ABS indicator lamp CHECK ENGINE indicator lamp Oil pressure warning lamp ESP warning lamp Rear fog light indicator lamp Coolant temperature warning lamp Low beam indicator lamp Electronic speedometer Multifunction display
Introduction of the smart fortwo, Model Series 451
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Body
Body
Interior
Adjusting instrument illumination
The instrument illumination can be adjusted in stages via the instrument cluster. Function requirements: • Circuit 15 ON • Standing lights switched on The left button on the instrument cluster is used to select instrument illumination adjustment. The right button on the instrument cluster can then be used to adjust the brightness in five steps. The current setting is saved. Depending on the equipment variant, this adjustment affects the following components: • Instrument cluster with multifunction display • Additional instruments, tachometer/clock (special equipment) • Heater or AC operating unit (air conditioning is special equipment) • Radio (special equipment) • Switches in center console switch panel and other illuminated switches (depending on special equipment) i Note Adjusting the clock in the multifunction display has no effect on the clock in vehicles with the special equipment of additional instruments (tachometer/clock). The time on the clock as an additional instrument is adjusted by means of two buttons on the back.
Adjusting clock in multifunction display
Function requirements: • Circuit 15 ON The clock in the multifunction display is adjusted using the left button on the instrument cluster. The right button on the instrument cluster can then be used to set the desired time. The current setting is saved.
P54.32 4574 00
1 Left button, select multiple display / set clock 2 Right button, instrument illumination / set clock
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Interior
Center console controls
The controls in model 451 are more integrated into the instrument panel than in the predecessor model 450 and are more clearly arranged as well as being more easily reachable by the driver. The controls that are arranged together in the middle of the instrument panel can be subdivided into three main categories. The upper controls can be used to set the required climate conditions in the vehicle interior. An adjust able center vent is integrated on each side. A temperature regulated air conditioning system can be ordered as special equipment. In the center of the controls the smart radio 9 with radio and CD player or the smart radio 10 with radio, integral 6 disk CD changer, MP3 compatible, can be installed as special equipment. The lower area of the controls consists of a switch panel, which can contain the following functions depending on the equipment installed: Standard equipment • Hazard warning flasher switch • Central locking open button • Central locking close button Special equipment • • • • • Front fog lamp button Left heated seat button Right heated seat button Anti theft alarm system button Rear fog light button in combination with rain sensor/light sensor
P68.20 3689 00
Temperature regulated air conditioning, radio and switch panel
Introduction of the smart fortwo, Model Series 451
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Body
Body
Doors/flaps
Side doors
The doors of the new smart fortwo follow the typical smart brand construction principle with a metal carrier part and the plastic CBS door paneling. The doors of the smart coupé and the smart cabrio are identical. As standard equipment the doors are fitted with mechanical window openers operated with cranks. The outside mirrors on the doors in the basic variant can be adjusted by means of a lever in the mirror triangle. Power windows are available as special equipment. These are operated via two switches below the door handle in the left door trim for the left and right side windows and one switch in the right door trim for the right side window. In vehicles with the optional elec tric outside mirrors there is another switch inte grated in the power window switch module in the left door trim. This is used to adjust and select the left and right mirrors. The door linings also contain a hard plastic pocket for small articles and the speakers that are available as special equipment. The ergonomics of the curved door handles have been improved over those of the predecessor model, and they are now installed horizontally instead of vertically. The triangular windows located above each door handle are stationary windows held in place by bolts. Crash requirements The design of the doors too has not remained unaf fected by the continual improvement of the smart safety concept. Whereas the predecessor model 450 had a door supporting structure of aluminum, this is now made of steel in model 451. In addition, panels and sections of high strength steel are used at strategically important points. This is the case, for example, with the diagonal struts and the side window slot frames. Emergency opening Normally, the smart fortwo is opened from outside via the standard equipment central locking system using the transmitter key. If the battery in the transmitter key is flat, a lock cylinder installed behind a small cover under the handle of the left door can be used to open the vehicle manually in an emergency.
P80.20 2951 00
1 Lock cylinder for emergency opening
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Doors/flaps
P72.10 3403 00
Design of driver door with power window and electric outside mirror
1 2 3 4 5 6 7 8 9 10
Door carrier module Window lifter mechanism Diagonal strut Top door hinge assembly Bottom door hinge assembly Inner door lining CBS door paneling Curved handle Side window Triangular window
H4/9 M10/3 M14/6 M14/6s1 M21/1 S21/1 S21/2 S50 S87/7
Left front speaker Left power window motor Left door CL [ZV] motor Left door CL [ZV] microswitch Left electrically adjustable and heated outside mirror Left power window switch Right power window switch Outside mirror adjustment switch Left door rotary tumbler microswitch
Introduction of the smart fortwo, Model Series 451
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Body
Body
Doors/flaps
Power windows
Power windows are available as special equipment in the new smart fortwo. The electric power window function is split into manual and automatic opening and closing. Manual opening and closing Pulling or pushing the left or right power window switch as far as the actuation point opens or closes the window accordingly as long as the switch is operated. When the power window switch is released, the window stops in its current position. Automatic opening and closing Briefly pulling the power window switch beyond the actuation point causes the window on the driver or passenger side to move to the fully open position automatically. It is closed automatically in the same way by oper ating the switch in the other direction. This function is only possible on the driver side. Function sequence Function requirements: • Circuit 15 ON When a power window switch is actuated, the adjust ment request for opening or closing is transmitted directly to the power window convenience feature control unit. The convenience feature control unit processes the request and checks whether the func tion requirement "circuit 15 ON" is satisfied. If the criteria are met, the power window convenience feature control unit actuates the corresponding power window motor directly.
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Doors/flaps
P72.29 2441 00
Data flow chart of power windows
1 2 3 4 5
Left power window adjustment request Right power window adjustment request Left power window actuation Right power window actuation Switch and controls illumination actuation
A1 M10/3 M10/4 N57/2 S21/1 S21/2
Instrument cluster Left power window motor Right power window motor Power window convenience feature control unit Left power window switch Right power window switch
Introduction of the smart fortwo, Model Series 451
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Body
Body
Doors/flaps
Rear end door
P72.20 2599 00
Design of rear end door shown on the smart fortwo coupé
1 2 3 4 5 6 7 8 9 10
Upper rear end door Upper rear end door paneling Rear spoiler Upper rear end door hinges Gas operated strut Rear window CBS rear end door paneling Lower rear end door Right door lock of lower rear end door Left door lock of lower rear end door
11 12 13 14
Door lock of upper rear end door Door panel lining Lower rear end door hinges Seal
E21 M6/4 S88/9
Center high mounted brake lamp Rear end door wiper motor Rear end door handle switch
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Doors/flaps
Emergency unlocking of rear end door
The rear end door in the new smart fortwo can be unlocked from the inside in an emergency, if the trunk lid central locking motor for operating the rotary tumbler is defective or de energized. Emergency unlocking in smart fortwo coupé To do this, a small tab at the side of the trunk lid lock paneling must be carefully bent over or broken off to produce a small hole. A shop made wire must then be inserted through the small hole so that enough downward pressure is exerted on the relay lever in the lock to unlock the rear end door at the top. A description of the procedure for manufacturing the emergency release wire in the workshop is given in the Workshop Information System (WIS). Emergency unlocking in smart fortwo cabrio In order to open the two locks in the cabrio, a hole must be accurately marked on the inside of the rear end door on each side. Then 5 mm holes are drilled through the paneling of the rear end door. A suitable screwdriver is inserted into each hole and the rear end door is unlocked by moving the screw driver handles simultaneously in the directions of the arrows. The exact dimensions for the holes and a detailed description of the procedure can be found in the Workshop Information System (WIS).
P72.20 2583 00
P72.20 2582 00
A Actuation direction 1 Tab/paneling hole on trunk lid lock 2 Emergency release wire
B Actuation direction 3 Hole (5 mm) 4 Screwdriver
Introduction of the smart fortwo, Model Series 451
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Body
Body
Roof systems
Variants of roof system
Two roof variants are available for the model series 451 coupé. In contrast to model series 450, a new fully electric Tritop fabric soft top is now installed on the cabrio. smart fortwo coupé • Full roof made of glass fiber reinforced polyurethane (PU) • Panoramic sunroof made of polycarbonate (PC) smart fortwo cabrio • Fully electric Tritop fabric soft top
P65.00 2115 00
Vehicle with PU roof
P77.21 2187 00
Vehicle with panoramic sunroof
P77.00 2303 00
Vehicle with fully electric Tritop fabric soft top
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Roof systems
Hard roofs on smart fortwo coupé Polyurethane full roof
In the standard equipment pure version the smart fortwo coupé is supplied with the PU full roof. The PU roof is only available in pitted matt black. The PU full roof sits on the body and is bonded to the bodyshell structure.
Panoramic sunroof
A new panoramic sunroof with steplessly variable roller sun blind is available for some equipment variants. In the new smart fortwo the polycarbonate (PC) panoramic sunroof replaces a design made of single pane safety glass. As usual on smart vehicles, the roof module is bonded with the Tridion safety cell. The latest in plastics technology makes it possible to use break proof material extensively in the vehicle. The material is covered with a scratch resistant coating and the light transmission of the tint is approx. 13 %. The material also provides 100 % protection against UV light. To block out the sunlight completely the steplessly variable inside roller blind can be closed. This is made of a polyester fabric and covers the entire transparent area of the panoramic sunroof. The roof and roller blind can be replaced separately. The panoramic sunroof is manufactured by a two component injection molding process in which the second component material serves to blacken the edges. At 9.2 kilograms including the roller blind, the weight of the polycarbonate module is two kilo grams less than that of the conventional glass roof. The advantages over a glass roof are the low weight and the reduced risk of breakage of the panoramic sunroof. The panoramic sunroof also conveys a very pleasant feeling of space.
P77.21 2188 00
Panoramic sunroof with roller sun blind
Introduction of the smart fortwo, Model Series 451
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Body
Body
Roof systems
Tritop fabric soft top
The Tritop fabric soft top of the new smart fortwo cabrio is the only one in the world that can be opened and closed while driving up to the maximum speed. The name TRITOP comes from the three main components of the soft top: • Folding top open • Rear soft top stowed • Side supports removed The advanced soft top control is fully electronic and features the following functions: • • • • Opening the folding top Closing the folding top Lowering the rear soft top Raising the rear soft top
P77.30 2390 00
Components of Tritop folding top
1 Folding top 2 Rear soft top
3 Left and right side supports
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Introduction of the smart fortwo, Model Series 451
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Roof systems
Soft top operation
The folding top and rear soft top are opened and closed using the power soft top switch on the elec tronic selector lever module control unit (Sedrive unit). The folding top can also be opened remotely and automatically by means of a button on the trans mitter key. To operate the soft top via the power soft top switch the vehicle's ignition must be switched on. A short press of the power soft top switch in the "Open" direction causes the folding top to open all the way to its end position. The folding top must always be fully opened before the rear soft top can be opened. If the power soft top switch is then pressed again and held in the "Open" direction, the rear soft top is folded away for as long as the switch is actuated. As soon as the rear soft top has been stowed in its end position, its motors cut out and the switch can be released. To close the soft top, the power soft top switch is pressed and held in the "Close" direction until the rear soft top has reached its upper end position and the motors of the rear soft top cut out; the switch can then be released. If the power soft top switch is pressed and held again, the folding top closes until it reaches its own end position and the motor cuts out; then the switch can be released again. The rear soft top and folding top lock automatically as soon as they reach their end positions.
P80.35 2298 00
1 Folding top automatic open button A Transmitter key
P77.00 2301 00
S84 Power soft top switch
i Note It is not possible to close the folding top auto matically because there is a potential risk of entrapment between the roof frame in the area of the windshield and the soft top during the closing sequence.
Introduction of the smart fortwo, Model Series 451
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Body
Body
Roof systems
Targa roof position
The so called targa roof position on the smart cabrio is achieved when the folding top is fully open, the side supports are not installed and the rear soft top is closed. The targa roof position is important with regard to the operation of the folding top because the side supports must be inserted before the folding top can be closed. The side supports are detected by a mechanical catch in the roof cassette lock.
Soft top control
The central controller unit of the soft top is the SAM control unit. The SAM control unit reads in the actuation request from the power soft top switch and actuates the appropriate motors depending on the position and status of the soft top. The soft top is powered by a total of three motors. A central motor in the roof cassette is responsible for opening and closing the folding top. The folding and raising of the rear soft top is carried out by two motors in the left and right main bearings of the soft top. The soft top also incorporates the center high mounted brake lamp and a glass rear window with an integral rear window heater, which is also activated by the SAM control unit. Function sequence of soft top actuation Function requirements: • Circuit 15 ON Pressing the power soft top switch sends a direct signal to open or close to the SAM control unit. The SAM control unit reads in the signal, checks whether the function requirements are satisfied and deter mines the status of the soft top via the microswitches installed on the soft top. If all the preconditions are met, the SAM control unit actuates the appropriate motor(s) for the desired operation.
P77.00 2302 00
Targa roof position
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Introduction of the smart fortwo, Model Series 451
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Roof systems
P77.39 2173 00
Data flow chart of soft top control
1 2 3 4 5 6 7 8 9
Circuit status Request to open folding top Request to open rear soft top Request to close rear soft top Request to close folding top Status of soft top end position microswitch Status of roof cassette open Status of rear soft top open Vehicle speed signal
A1 K66/1 K66/2 M12/6 M12/7 M12/8 N10/10 S2/1 S84 S84/37 S84/38 S84/39 S84/40 S84/41 A CAN
Instrument cluster Open soft top relay Close soft top relay Electric soft top motor Left soft top drive Right soft top drive SAM control unit Ignition/starter switch Power soft top switch Folding top microswitch Left roof cassette microswitch Right rear soft top microswitch Right roof cassette microswitch Left rear soft top microswitch Transmitter key Controller Area Network (data bus/CAN bus)
Introduction of the smart fortwo, Model Series 451
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Body
Body
Roof systems
Soft top benefits and advantages
The soft top of the new smart fortwo cabrio has several important additional features over its predecessor, which make driving with the top open even more convenient. In the second generation of the smarts fortwo the rear soft top can be stowed in its end position simply by operating a switch, and can be closed up to the B pillar in the same way. This optimization makes it possible to open and close the soft top at will and at any driving speed. Furthermore, the Tritop fabric soft top now features a heated rear window made of single pane safety glass. Advantage: The glass is scratch resistant and offers a clear view to the rear even in winter. The standard equipment headliner is made of a light colored knitted polyester fabric and covers the peak of the roof too, extending forward as far as the windshield frame. Experience gained with the smart fortwo and smart roadster series has been incorporated into the new soft top system. The result is even more convenient operation, a perfected sealing system, even greater interchangeability of components for easier mainte nance and greater everyday benefits. As in the previous smart soft top systems the folding roof is powered by a cable and a central drive motor between the windshield frame and the B pillar. The motor is housed in the roof cassette located in front of the rear roof spoiler. The two electric motors responsible for moving the rear soft top are connected directly with the soft top linkage by means of a pinion and gear quadrant. A self locking worm drive for the gearing provides a suitable step down ratio for the movement of the folding mechanism and also guarantees that the mechanism is locked when it reaches its end posi tion. The rear window is swung to an almost horizontal position when the roof is folded. To allow the levers to be attached, the glass is surrounded by a plastic frame. The top of the glass must be swung out of the soft top fabric so that the soft top with its large window can be folded in the desired position. The seal between the window and the fabric is provided by an all round sealing section that retains the necessary tension when the soft top is closed. The glass rear window is higher up in the luggage compartment than the previous PVC rear window. This significantly increases the available stowage capacity when the soft top is folded. As before, smart fortwo cabrio drivers can unlock the rear latch of the soft top and swing it upwards to facili tate loading. To do this, two levers on the inside must be operated. A detent holds the soft top section in the raised position.
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Roof systems
As in the first version of the smart fortwo cabrio, with the rear soft top folded the side supports can be removed and stowed on the inside of the tailgate. Special stowage compartments are provided. Due to the shape, no retaining straps are necessary. The side support locking mechanism in the B pillar resembles that of the predecessor model in terms of operation and the double operation of the release lever. The same applies for the construction of the side supports, which consist of plastic structural elements faced with bonded sheet metal panels painted on the outside in the vehicle color. Integral aluminum rails carry the sliders of the folding top.
The soft top fabric itself consists of a hard wearing, black polyacrylic material on the outside and a poly ester/cotton blend on the inside. A layer of rubber joins the two. The rear roof spoiler is made of black polyamide plastic and, apart from its aerodynamic function, acts as the attachment point for the center high mounted brake lamp. The combined weight of the entire soft top module is 30 kilograms. That is only two kilograms more than in the predecessor model, despite the use of a glass rear window and two additional electric motors.
P72.20 2600 00
Stowage compartment in rear end door for side supports
Introduction of the smart fortwo, Model Series 451
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Body
Body
Roof systems
P 77.30 2389 00
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Headliner Sliding rail Slide plates Bow Folding top Seal Latch Tensioning arm seal Rear soft top Rear window seal Rear window (glass) Drive cable Drive cable guide Folding top motor
15 16 17 18 19 20 21 22 23 24 25 26 27 28
Left wiring harness Right wiring harness Left roof cassette panel Right roof cassette panel Roof cassette Tensioning arm Latch bracket Index bolt Left/right rear soft top motor Pinion Main bearing Spoiler with center high mounted brake lamp Left side support Right side support
Many of the parts listed are available as a replacement parts package (details are in the EPC). This allows an adequate depth of repair (see WIS). Using all the replacement parts packages a complete Tritop fabric soft top can be constructed, which renders expensive replacement of the complete unit unnecessary.
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Introduction of the smart fortwo, Model Series 451
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Central locking
Central locking
The central locking in the new smart fortwo includes the locking and unlocking of both doors and the fuel filler flap, and the opening of the trunk lid in the smart coupé or the opening of the soft top on the smart cabrio. A distinction is drawn between manual and automatic functions. Manual functions: • Remote control with the transmitter key • Door opening from the inside • Operation via the interior CL locking and unlocking switches in the cockpit switch group • Manual unlocking with the transmitter key at the driver door lock Automatic functions: • Speed dependent locking • Emergency opening after crash recognition • Relocking Unlocking or locking via the transmitter key When the "Unlock" or "Lock" button on the trans mitter key is pressed, it sends a radio signal to the SAM control unit. The SAM control unit checks the access authorization of the transmitter key. If the access authorization is valid, it actuates the following motors directly to unlock or lock the vehicle: • Right door CL motor • Left door CL motor • Fuel filler flap CL motor When unlocking, the rear end door handle switch is enable; and when locking, it is disabled. To open the trunk lid, the status of the rear end door handle switch (enabled or disabled) is read in directly by the SAM control unit. If the central locking is unlocked, the SAM control unit actuates the trunk lid CL motor directly to unlock the rotary tumbler. Door opening from the inside The vehicle doors can always be opened from the inside with the door handle regardless of the status of the central locking. This unlocks the doors and the fuel filler flap. The rear end door handle switch is enabled. Unlocking and locking from the inside via the switches in the cockpit switch group When the side doors and the rear end door are closed, pressing the "Lock or unlock" switch in the cockpit switch group causes a signal to be sent straight to the SAM control unit. This actuates the central locking motors. The vehicle doors and the fuel filler flap are unlocked or locked accordingly and the rear end door handle switch is enabled or disabled as when unlocking or locking with the transmitter key. Special function: With the driver door open, circuit 15 ON and the inside lock CL switch actuated, the vehicle is locked within 5 s of circuit 15 OFF and the closing of the driver door. This function is useful when the vehicle cannot be locked using the transmitter key due to a flat battery in the key.
Introduction of the smart fortwo, Model Series 451
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Body
Body
Central locking
Manual unlocking of the driver door with the trans mitter key at the door lock Actuating the door lock in the driver door with the transmitter key unlocks the vehicle doors and the fuel filler flap and enables the handle switch on the rear end door. In vehicles with anti theft alarm system, this must be deactivated otherwise an alarm will be triggered. Locking is possible only in vehicles for the Spanish market. Speed dependent locking This function automatically locks the doors as soon as the vehicle speed exceeds 14 km/h. Speed dependent locking can be activated or deactivated as required. Relocking This function relocks the vehicle automatically if none of the doors is opened 60 s after unlocking. Emergency opening after crash recognition This functions unlocks the doors after an accident that triggers a crash signal. Remote trunk opening (smart fortwo coupé only) When the "Remote trunk opening" button on the transmitter key is pressed, it sends a radio signal to the SAM control unit. This checks the access autho rization of the transmitter key. If the access autho rization is valid, the SAM control unit actuates the trunk lid CL motor directly. Remote soft top opening (smart fortwo cabrio only) When the "Remote soft top opening" button on the transmitter key is pressed, it sends a radio signal to the SAM control unit. This checks the access autho rization of the transmitter key. If the access autho rization is valid, the SAM control unit actuates the electric soft top motor directly.
i Note The radio signal for unlocking the door is picked up by an antenna integrated in the SAM control unit. There is no external antenna for the central locking.
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Introduction of the smart fortwo, Model Series 451
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Central locking
P80.20-2962-00
1 2 3 4 5 6 7 8 9 10 11 12 13 14 A1 E1e5 E2e5 E3e1 E4e1
Unlocking/locking request Doors status Trunk lid or rear end door status Unlocking/locking actuation Rear end door unlocking request Visual feedback actuation Trunk lid or rear end door unlocking actuation Unlocking via inside door opener request Inside unlocking/locking request Emergency opening request Rear end door opening request (coupé) Soft top opening actuation Soft top opening request Vehicle speed Instrument cluster Left turn signal light Right turn signal light Left turn signal light Right turn signal light
E22/1 E22/2 M12/6 M14/5 M14/5s1 M14/6 M14/6s1 M14/7 M14/10 N2/7 N10/10 S6/1 S6/1s1 S6/1s11 S6/1s12 S15 S17/8 S88/9 A CAN
Left additional turn signal lamp Right additional turn signal lamp Electric soft top motor Right door CL [ZV] motor Right door CL [ZV] microswitch Left door CL [ZV] motor Left door CL [ZV] microswitch Rear end door CL [ZV] motor Fuel filler flap CL [ZV] motor Restraint systems control unit SAM control unit Cockpit switch group Hazard warning flasher switch Inside unlock CL [ZV] switch Inside lock CL [ZV] switch Remote trunk opening switch (model 451.3) Trunk lid rotary tumbler microswitch (model 451.4) Rear end door handle switch Transmitter key Controller Area Network (data bus/CAN bus)
Introduction of the smart fortwo, Model Series 451
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Body
Body
Anti theft alarm system (ATA)
ATA system
The anti theft alarm system (ATA) monitors all rele vant inputs for their non actuated state. If a change of status is detected at one of the moni tored inputs, an acoustic and visual alarm is given. The acoustic signals are output by the alarm signal siren with inclination sensor. The visual signals are output via the vehicle illumination. The SAM control unit is the master control unit for the anti theft alarm system (ATA). When armed, the anti theft alarm system (ATA) moni tors: • • • • • the doors the rear end door the alarm siren with inclination sensor the position change of the vehicle movements in the interior compartment Alarm triggering An alarm is triggered when the SAM control unit receives a status change from the following compo nents: • • • • • ATA microwave sensor Inclination sensor Trunk lid rotary tumbler microswitch Right door rotary tumbler microswitch Left door rotary tumbler microswitch
Alarm output The alarm is output via the turn signal lights and the alarm siren with inclination sensor. Interior protection/tow away protection The ATA microwave sensor is activated approx. 30 s after the vehicle is locked. Interior protection can be deactivated using the tow away protection/inte rior protection switch. The inclination sensor in the alarm siren with incli nation sensor registers a positional change of the vehicle. The inclination sensor, and thus the tow away protection, can be deactivated using the tow away protection/interior protection switch. The interior protection or tow away protection is reactivated automatically the next time the vehicle is locked.
Activation and deactivation The anti theft alarm system (ATA) is activated when the vehicle is locked with the transmitter key. The anti theft alarm system (ATA) is deactivated by unlocking the vehicle with the transmitter key or by inserting an authorized transmitter key in the igni tion lock.
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Introduction of the smart fortwo, Model Series 451
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Anti theft alarm system (ATA)
P80.50-2596-00
Data flow chart of anti theft alarm system (ATA)
1 2 3 4 5 6 7 8 9 10 11
Activate ATA with transmitter key Deactivate ATA with transmitter key Trunk lid or rear end door status Doors status Deactivate ATA via ignition lock Movement in interior signal Alarm siren actuation Turn signal lights actuation Inclination sensor status change Turn signal indicator actuation Tow away protection/interior protection shutoff Instrument cluster Left turn signal indicator lamp Right turn signal indicator lamp ATA [EDW] microwave sensor Left turn signal light Right turn signal light Left turn signal light
E4e1 E22/1 E22/2 H3/2 L11 N10/10 S2/1 S6/1 S6/1s1 S6/1s10 S15 S17/8 S87/6 S87/7 A CAN LIN C
A1 A1e1 A1e2 B32 E1e5 E2e5 E3e1
Right turn signal light Left additional turn signal lamp Right additional turn signal lamp Alarm siren with inclination sensor Transponder coil SAM control unit Ignition/starter switch Cockpit switch group Hazard warning flasher switch Tow away protection/interior protection switch Remote trunk opening switch (model 451.3) Trunk lid rotary tumbler microswitch (model 451.4) Right door rotary tumbler microswitch Left door rotary tumbler microswitch Transmitter key Controller Area Network (data bus/CAN bus) Interior local interconnect network 2
Introduction of the smart fortwo, Model Series 451
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Body
Body
Exterior lights
Headlamps and front fog lamps
The new smart fortwo is available in Europe in both right hand and left hand drive variants. The headlamps have been redesigned both optically and technically. The curved, bulbous form of the headlamp from the predecessor model series 450 has been reshaped in line with the customary Mercedes Benz technical design. Unlike the predecessor model, projection modules are used for the low beam in model 451. Front fog lamps are available as special equipment. The installation position has been relocated from the front center part near the radiator grille to the front module carrier below the front bumper.
P82.10 4624 00
E5/1
Left front fog lamp
P82.10 4622 00
Headlamps
E2e1 E2e2
Right high beam Right low beam
E2e5 E6/14
Right turn signal light Right standing light
98
Introduction of the smart fortwo, Model Series 451
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Exterior lights
Additional turn signal lamps and taillamps
The side additional turn signal lamp on the new model 451 has been optically enhanced by a dark lens and the taillamps have been integrated into the rear end so as to give a more sporty look. The three part appearance of the taillamps in the predecessor model series 450 has been optically consolidated with two piece lenses. The left taillamp contains the brake light and tail light in the upper round part with the left turn signal light immediately underneath. At the bottom of the left taillamp is the rear fog light in the center with the reflector arranged around it.
P82.10 4642 00
On the right hand side, the upper portion of the taillamp houses the brake light and taillight, with the right turn signal light underneath and the backup light at the bottom in the center with the reflector around it.
E22/1
Left additional turn signal lamp
P82.10 4623 00
Taillamps
E3e1 E3e2 E3e4 E3e5
Left turn signal light Left taillight Left brake light Left rear fog light
E4e1 E4e2 E4e3 E4e4
Right turn signal light Right taillight Right backup light Right brake light
Introduction of the smart fortwo, Model Series 451
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Body
Body
Exterior lights
Auto on/off headlamps (Autolight function)
The basic equipment can be expanded with the convenient Autolight function as special equipment. A rain sensor/light sensor is additionally installed for the Autolight function. The rain sensor/light sensor is located on the inside of the windshield near the inside rearview mirror. The sensor distin guishes between light and dark by measuring the intensity of the light and thereby enables the exte rior lights to be switched on and off according to the ambient light conditions. The activated light corre sponds to the "usual" driving lights with low beam. Special feature The Autolight function is activated by moving the combination switch to the AUTO position. The AUTO position of the combination switch is only available in vehicles with Autolight function installed as special equipment. In these vehicles the switch for the rear fog lamp is no longer located on the combi nation switch, but in the switch panel in the center console. Signal flow When the Autolight function is activated and dark ness is detected, the rain sensor/light sensor sends a corresponding signal via the LIN B to the SAM control unit. This evaluates the signal and actuates the appropriate lights or lamps over direct lines.
P54.25 5577 00 P54.21 2704 00
B38
Rain sensor/light sensor
1 AUTO position S4 Combination switch
Coming Home function The function is a component of the Autolight func tion. When the vehicle is locked or unlocked, the driving lights are switched on for 12 s. The function is also activated by the rain sensor/light sensor; the position of the combination switch is immaterial. The Coming Home function can only be deactivated by coding at a smart service center.
i Note The daytime running lights function is not possible in combination with the Autolight function.
100
Introduction of the smart fortwo, Model Series 451
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Exterior lights
Networking of exterior lights
P82.10 4608 00
Exterior lights with Autolight function
A1 A1e1 A1e2 A1e3 A1e52 A1e67 B38 E1e1 E1e2 E1e5 E1m1 E2e1 E2e2 E2e5 E2m1 E3e1 E3e2 E3e4 E3e5 E4e1 E4e2 E4e3 E4e4
Instrument cluster Left turn signal indicator lamp Right turn signal indicator lamp High beam indicator lamp Rear fog light indicator lamp Low beam indicator lamp Rain sensor/light sensor Left high beam Left low beam Left turn signal light Left headlamp range adjustment motor Right high beam Right low beam Right turn signal light Right headlamp range adjustment motor Left turn signal light Left taillight Left brake light Left rear fog light Right turn signal light Right taillight Right backup light Right brake light
E5/1 E5/2 E6/13 E6/14 E19/1 E19/2 E21 E22/1 E22/2 N10/10 N15/5 N47 5 S2/1 S4 S6/1s7 S6/1s8 S9/1 S87/7 CAN LIN B
Left front fog lamp Right front fog lamp Left standing light Right standing light Left license plate lamp Right license plate lamp Center high mounted brake lamp Left additional turn signal lamp Right additional turn signal lamp SAM control unit Electronic selector lever module control unit ESP control unit Ignition/starter switch Combination switch Rear fog lamp switch Front fog lamps switch Brake light switch Left door rotary tumbler microswitch Controller Area Network (data bus/CAN bus) Interior local interconnect network 1
Introduction of the smart fortwo, Model Series 451
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Body
Body
Interior lights
General
Model series 451 is fitted with an interior lamp in the headliner between the sun visors. There are several operating and function options for activating the interior lights. Activation options: • Operation of the switch on the interior lamp • Locking or unlocking of the vehicle via the central locking • Opening of the driver or passenger door • Opening of the trunk lid • After an accident (with crash signal) Manual function The interior light can be switched on, switched off or switched to automatic control manually by operating the switch in the interior lamp. Automatic function Prerequisite: Switch in interior lamp pressed to rear position (automatic control activated). Interior light request via the following functions: • A radio signal is transmitted to the SAM control unit when the central locking is unlocked with the transmitter key. • A signal is sent directly to the SAM control unit by the appropriate rotary tumbler switch when the driver or passenger door or the trunk lid is opened. • When an ATA alarm is triggered via the microwave sensor or the inclination sensor. The microwave sensor or the inclination sensor sends a signal over the LIN bus to the SAM control unit. The central control unit for the interior lights is the SAM control unit. It receives, processes and evalu ates all the signals. If the preconditions linked to an interior light request are met, a switch on signal is transmitted to the interior lamp. If one of the operating or function requirements is not satisfied, the associated interior light request is not valid and the interior light is deactivated.
P82.20 2983 00
1 2 3 E15/4 E15/4s1
Automatic control ON Interior lamp OFF Interior lamp ON Front interior lamp Interior lamp switch
102
Introduction of the smart fortwo, Model Series 451
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Interior lights
P82.20 2984 00
Data flow chart of interior lights
1 2 3 4 5 E15/4 E15/4s1 N10/10 N2/7
Central locking unlocked Driver or passenger door open Trunk lid or rear end door open Accident with crash signal Switch on interior lights Front interior lamp Interior lamp switch SAM control unit Restraint systems control unit
S15 S17/8 S87/6 S87/7 S88/9 A CAN
Remote trunk opening switch (model 451.3) Trunk lid rotary tumbler microswitch (model 451.4) Right door rotary tumbler microswitch Left door rotary tumbler microswitch Rear end door handle switch Transmitter key Controller Area Network (data bus/CAN bus)
Introduction of the smart fortwo, Model Series 451
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Body
Body
Wiper system
Windshield wiper system
The wiper system in model series 451 is a counter rotating system. A three jet windshield washer nozzle is installed in the center to clean the windshield. This is the only compact car to be equipped with the new aero wiper blades on the front wiper system. An integral spoiler in the design of the rubber wiper blade prevents it from lifting. The lack of a metal bow means that the support structure can no longer ice up. This improves the effectiveness of the wiper in winter. With the reduced width of the wiper blade and wiper arm the total space requirement is smaller and the driver's view less restricted. The aero wiper blades are easier and quicker to attach and detach than conventional wiper blades.
Aero front wiper blades
The aero wiper technology provides highly effective wiping thanks to the constant contact pressure of the wiper blades along their entire length. This is realized by two metal bars on each blade which ensure that it conforms perfectly to the curvature of the windshield.
P82.30 2643 00
Windshield wiper system with aero wiper blades
1 2 3 4
Aero wiper blades Wiper arms Windshield washer nozzle Wiper linkage
5 M5/1 M6/1
Windshield washer fluid reservoir Windshield washer fluid pump Wiper motor
104
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Wiper system
P82.30 2644 00
Data flow chart of wiper system
1 2 3 4 5 6 7 8 9 10
Wiper switch position Windshield washer fluid pump actuation Wipe request Reverse gear status Wiper motor position feedback Rear end door wiper motor position feedback Vehicle speed signal Outside temperature Wiper motor actuation Rear end door wiper motor actuation
A1 B38 M5/1 M6/1 M6/4 N10/10 N15/6 S4/4 LIN B CAN
Instrument cluster Rain sensor/light sensor Windshield washer fluid pump Wiper motor Rear end door wiper motor (in coupé) SAM control unit Automated manual transmission control unit Right wiper switch Interior local interconnect network 1 Controller Area Network (data bus/CAN bus)
Introduction of the smart fortwo, Model Series 451
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Body
Body
Audio system
Radio and sound systems
Two radio variants with a 2 DIN operating unit are available as special equipment and accessories for model series 451. Variant 1: smart radio 9 with radio and CD player
P82.60 5801 00
smart radio 9
Version 2: smart radio 10 with radio, integral 6 disk CD changer, MP3 compatible
P82.60 5802 00
smart radio 10
106
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Audio system
Speaker sound variants Basic package
In model series 451 a basic package with one broad band speaker in each door is available as special equipment.
P82.62 3139 00
Speaker diagram basic package
A2 H4/9 H4/10
Radio Left front speaker Right front speaker
The sound system as special equipment comprises two tweeters and two midrange speakers, one subwoofer and the smart MP3 interface (AUX jack). Thanks to the modular design, all these components can be retrofitted individually as accessories, even as an expansion of the standard speaker system. smart accessory sound system (two tweeters, two midrange speakers): The tweeters are simply clipped in place under the instrument panel; the wiring harness is already installed. The door panels must be removed in order to install the midrange speakers. Subwoofer: The driver seat is removed and the subwoofer is bolted on together with the driver seat; the wiring harness is already there under the floor carpeting.
Speaker diagram sound systems
P82.62 3140 00
smart MP3 interface (AUX jack): As in series produc tion, a hole is drilled in the area of the stowage compartment in the instrument panel on the passenger side, the jack is slotted in and plugged into the or the audio switchover box.
1 A2 H4/9 H4/10 H4/29 H4/33 H4/34
smart MP3 interface (AUX jack) Radio Left front speaker Right front speaker Subwoofer Left tweeter Right tweeter
Introduction of the smart fortwo, Model Series 451
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Body
Body
Bluetooth hands free system
General
The Bluetooth hands free system establishes a wireless link between the telephone and the hands free system, thus putting an end to the tedious plug ging and unplugging of the portable CTEL. It is compatible with the most common Bluetooth capable portable CTELs. Function The Bluetooth hands free system consists of an operating unit with integral control unit and a sepa rate microphone. • The operating unit is mounted on the telephone console • The connection line is routed to the radio or the audio switchover box • The line for the microphone is routed along the right hand A pillar to the center of the front roof frame paneling • Radio mute and voice output occur through the vehicle speakers
Audio switchover box
Vehicles equipped with at least two of the following audio components: • smart MP3 interface (AUX jack) • portable smart navigation system • Bluetooth hands free system require an audio switchover box to regulate the priority of the communications signals. The audio components are connected not directly to the radio, but to the audio switchover box, which is linked to the radio. According to priority: 1 Bluetooth hands free system 2 portable smart navigation system 3 smart MP3 interface (AUX jack) the signals are relayed to the radio or blocked. The volume of all audio components can be regulated via the radio.
P82.00-2519-00
Networking of all audio components
1 2 3 4
smart MP3 interface (AUX jack) Portable smart navigation system Bluetooth hands free system Audio switchover box
A2/1 A2/2
smart radio 9 smart radio 10
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Navigation
Portable smart navigation system General
Available as special equipment and an accessory for model series 451 is a portables smart navigation system with a tested vehicle specific mounting bracket (Car Kit) in the ideal position, concealed wiring and a charging function. Radio mute and voice output occur through the vehicle speakers. It is located on the instrument panel between the instru ment cluster and the radio. The portable smart navi gation system is connected either straight to the radio or to the audio switchover box, depending on the equipment installed. With its lithium ion rechargeable battery the portable smart navigation system can also be used outside the vehicle. The data memory is a 256 MB SD memory card. A DVD with European map information is included with the package.
Function
The portable smart navigation system determines its position independently by means of an integral GPS antenna. The route is calculated by an internal processor and is output via the integral speakers or the radio speakers and the touchscreen display. Operation • The portable smart navigation system is switched on and off using the on/off switch on the unit. • The volume is controlled with the rotary switch on the portable smart navigation system and/or on the radio. • The brightness and other system settings are adjusted via the touchscreen display in the main navigation menu. • The destination is entered with the touchscreen display.
P82.61 3885 00
1 Touchscreen display
2 Portable smart navigation system
Introduction of the smart fortwo, Model Series 451
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Body
Body
Climate control
Heating
Model series 451 is equipped with a heating system as standard. The temperature and blower speed are each set by means of a slide control. The tempera ture blend flap in the air distribution box is oper ated mechanically via a Bowden cable. The air distri bution is adjusted with a 360° rotating button switch. The air distribution flap is actuated mechan ically via a cable shaft. The blower can be adjusted in four power stages. The rpm is regulated by means of an external series resistor: • Stage 0: Blower off • Stage 1: Blower on Weak, low speed • Stage 2: Blower on Strong, higher speed • Stage 3: Blower on Stronger, higher speed • Stage 4: Blower on Maximum strength The rear window heater button in the heating system switches on the heated rear window and the function LED in the button lights up. The heated rear window is switched off either auto matically via a timer control or by pressing the rear window heater button again. The function LED goes out. If the on board power supply voltage is too low, the rear window heater is switched off automatically.
P83.10 2576 00
Air outlets for heater and temperature regulated air conditioning
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Climate control
Temperature regulated air conditioning
The control functions of air distribution, blower output, temperature setting and heated rear window are as described for the heater. Activation of the air conditioning: • Press A/C button. The function LED lights up Deactivation of the air conditioning: • Press A/C button. The function LED goes out. For safety reasons, if the air distribution lever is moved precisely to "Windshield Defrost", the air conditioning switches itself on automatically with no action by the occupants in order to ensure that the windshield is defrosted and dried as quickly as possible. In this case the function LED does not light up to indicate that the air conditioning has been activated automatically. When the air distribution lever is moved away from the Defrost position, this function is canceled. This happens regardless of the programmed tempera ture or blower stage. In addition, air recirculation mode is deactivated if it is on. The air recirculation flap and the temperature blend flap are actuated via electric actuator motors. The cooling output of the refrigerant compressor is controlled by means of an appropriate CAN signal from the SAM control unit. The interior temperature is measured by an integral interior temperature sensor located on the bottom of the heater/air conditioning operating unit.
i Note The air conditioning cannot be operated in temperatures below 3 °C.
P83.40 3630 00
Control and operating unit for temperature regulated air conditioning
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Body
Body
Climate control
Air recirculation mode
When the air recirculation mode button is pressed, the fresh air flap is closed. This causes the air to circulate in the interior compartment only. The function LED in the button lights up during air recir culation mode.
i Note The temperature regulated air conditioning switches off briefly: • • • • if the engine speed is too low when starting up at coolant temperatures above 115 °C at outside temperatures below 3 °C
112
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Climate control
Electric heater booster
As in the predecessor model series, vehicles with diesel engine are fitted with an electric heater booster to boost the heat output. The electric heater booster ensures that the engine reaches its operating temperature and the interior heats up more quickly after engine start and during the warm up phase.
Vehicles with diesel engine and heater The heater booster is switched on and off manually using the temperature slide control. Switch on: Push the temperature control all the way up Switch off: Push the temperature control at least one notch down The heater booster can only be switched on when: • the outside temperature is below 15 °C • the coolant temperature is below 70 °C
Vehicles with diesel engine and temperature regu lated air conditioning The heater booster cuts in automatically when the temperature in the interior compartment is very much lower than the temperature set on the oper ating unit. When the set temperature is reached, the heater booster automatically cuts out again. The heater booster only switches itself on when: • the outside temperature is below 15 °C • the coolant temperature is below 70 °C
Introduction of the smart fortwo, Model Series 451
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Body
Body
Customized Bodypanel System (CBS)
CBS concept
Like model 450, model series 451 features the proven Customized Bodypanel System. The CBS concept is composed of "bodypanels" that are installed as detachable parts around the vehicle and form a large proportion of the vehicle's external skin. Front end module The statics of the CBS in the area of the front end are based on a one piece, bolt on front end module with integral pedestrian protection. The front end module is injection molded polypropy lene plastic stiffened with partial reinforcement panels on the longitudinal frame member. The front end module also holds the engine radiator module, including the AC condenser, the headlamps, the front fog lamp and the CBS bodypanels. Bodypanels Depending on the color variant, the bodypanels are supplied either as colored plastic or with 2 coat metallic paintwork. The bodypanels are overcoated with a clearcoat to protect against UV radiation. The bodypanel concept has proven to be robust and easy to repair in practice. If damaged, they can be replaced with little effort and at low cost. Rear end door The inside of the rear end door in the new smart fortwo coupé contains an integral compartment for accommodating the hazard warning triangle, the first aid kit or similar. In the new smart fortwo cabrio the stowage space is intended for crash proof storage of the roof side supports.
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Customized Bodypanel System (CBS)
P88.00 2344 00
CBS components with front end module and crash management system (CMS)
1 2 3 4 5 6 7 8 9
Front end module Front CMS Left fender Right fender Front spoiler Front center part Maintenance flap Fresh air intake cover Left door paneling
10 11 12 13 14 15 16 17 18
Right door paneling Left side part Fresh air intake Right side part Fuel filler flap Rear CMS Exhaust system covering Rear center part Rear end door paneling
Introduction of the smart fortwo, Model Series 451
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Body
Body
Outside mirrors
Electric outside mirrors
Electrically adjustable and heated outside mirrors can be ordered as special equipment for the new smart fortwo. Adjusting outside mirrors The electrically adjustable outside mirrors are operated using the outside mirror adjustment switch located in the left door trim. The switch can be turned to the left or right to select the outside mirror to be adjusted. The selected outside mirror is adjusted by pressing the outside mirror switch upwards or to the left or right. Adjustment function Function requirements: • Circuit 15R ON The outside mirror adjustment switch transmits the adjustment request directly to the "mirror up/down adjustment motor" and to the "mirror in/out adjust ment motor" of the selected outside mirror. The actuated motor converts the request into an appro priate adjustment movement. Heated outside mirrors The heated outside mirrors are activated automati cally when the key in the ignition lock is at position 1. Activating heating function Function requirements: • Circuit 15R ON The mirror heaters in the left and right outside mirrors are actuated directly by the SAM control unit.
P88.79 2221 00
S50
Outside mirror adjustment switch
116
Introduction of the smart fortwo, Model Series 451
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Outside mirrors
P88.79 2220 00
Data flow chart of electrically adjustable and heated outside mirrors
1 2 M21/1
Adjustment request Mirror heater actuation
Left electrically adjustable and heated outside mirror M21/1m1 Mirror up/down adjustment motor M21/1m2 Mirror in/out adjustment motor M21/1r1 Mirror heater
Right electrically adjustable and heated outside mirror M21/2m1 Mirror up/down adjustment motor M21/2m2 Mirror in/out adjustment motor M21/2r1 Mirror heater N10/10 SAM control unit S50 Outside mirror adjustment switch
M21/2
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Body
Body
Seats
Seats, general
The safety integral seats in the new model series 451 can be adjusted in terms of seat length and backrest angle. The backrest of the passenger seat can be folded forwards to allow through loading of long loads. The following optional components are available as special equipment: • Seat heaters in the seat bolsters and backrest cushions • Head/thoraxbags integrated in the backrests • ISOFIX child seat attachment with "Passenger Airbag OFF" switch and TopTether attachment
Seat heaters
The special equipment of seat heaters in model 451 consists of two heating elements which are installed in the seat bolster and backrest cushion of each seat. The seat heaters are activated separately for each side from the switch panel in the center console. Pressing the seat heater button for the driver or passenger side switches on the seat heater at stage 2. Another press of the button switches the seat heater to stage 1. If the button is pressed a third time, the seat heater is switched off. The different stages are indicated in the relevant button by the lighting of one LED for stage 1 and two LEDs for stage 2. The heated seats control unit incorporates a temperature sensor that measures the ambient temperature. The heating elements in the driver and passenger seats follow a temperature profile based on this temperature. The heater output is constantly monitored to check the seat temperature.
P91.10 3049 00
Integral seats
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Seats
Function
Function requirements: • Circuit 15 ON When the seat heater switch for the driver or passenger seat is pressed, a request signal is sent directly to the heated seats control unit. In the heated seats control unit the request for activation of the seat heater is processed with the function requirement. The function requirement is transmitted by the igni tion/starter switch straight to the SAM control unit, from where it is forwarded to the heated seats control unit. If all the criteria for activation are satisfied, the appropriate seat heater is switched on by the heated seats control unit over a direct line.
P91.30 2280 00
Data flow chart of electric seat heaters
1 Seat heating request 2 Activation of heating elements
N25/5 R13/1 R13/3 S6/1 S6/1s3 S6/1s4
Front HS [SIH] control unit Left seat heated cushion Right seat heated cushion Cockpit switch group Left seat heater switch Right seat heater switch
Introduction of the smart fortwo, Model Series 451
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Body
Body
Supplemental restraint system
Restraint system
The new generation of the smart fortwo model 451 is well equipped for occupant safety with full size airbags, emergency tensioning retractors and belt force limiters on the driver and passenger sides as standard. It is also possible to order head/thoraxbags in the seat backrests as special equipment for extra protection of the head and thorax. In the event of a frontal collision, the driver and passenger airbags prevent the driver's head from hitting the steering wheel and the passenger's head from impacting the dashboard. The pyrotechnical emergency tensioning retractors ensure that the occupants are properly restrained in their seats in a frontal impact and that they follow a defined forward displacement with the energy being absorbed by the belt force limiter. Small children can be transported in safety with the ISOFIX child seat attachment system for the passenger seat, which can be ordered as factory installed special equipment. This special equipment includes the ability to temporarily deactivate the airbag on the passenger side. For this purpose there is a key operated switch on edge of the dash board on the passenger side, which is operated with the vehicle key. The airbag OFF indicator lamp is located in the roof frame behind the interior lamp and lights up as soon as the shutoff function is activated. In order to activate the systems in good time in the event of a crash and thus keep the physical conse quences for the occupants low, sensors are installed with certain special equipment to detect a collision occurring. Depending on the vehicle equipment the following sensors are installed: • Side trigger sensors on each side in the inner sills in the area of the B pillars for detecting a side on collision (only in vehicles with head/thoraxbags). • Trigger sensor in the restraint systems control unit for detecting a frontal crash, a rear end impact or a side on collision The central controller unit of the supplemental restraint system is the restraint systems control unit, which is located in the center of the vehicle on the crossmember under the instrument panel. If the restraint systems control unit detects a fault in the system, this is indicated by the lighting of a warning lamp in the instrument cluster.
P91.60 3372 00
S68/15
Passenger airbag cutout switch
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Supplemental restraint system
P91.60.3386-00
Data flow chart of supplemental restraint system
1 2 3 4 5 6 7 A1 A1e15 A53 A54 E16
Passenger airbag cutout signal Crash signal Warning and fault message output Squib and sensor monitoring Trigger restraint equipment Passenger airbag cutout display Impact detection Instrument cluster Airbag indicator and warning lamp Driver head/thoraxbag sensor Passenger head/thoraxbag sensor Automatic child seat recognition airbag OFF indicator lamp
N2/7 N3/9 N3/10 N10/10 R12/1 R12/2 R12/4 R12/13 R12/20 R12/21 S68/15 CAN
Restraint systems control unit CDI control unit (diesel engine) ME SFI [ME] control unit (gasoline engine) SAM control unit Driver emergency tensioning retractor squib Passenger emergency tensioning retractor squib Passenger airbag ignition squib 1 Driver airbag ignition squib 1 Driver head/thoraxbag squib Passenger head/thoraxbag squib Passenger airbag cutout switch Controller Area Network (data bus/CAN bus)
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Body
Body
Body
Bodyshell structure
The bodyshell structure of the new model series 451 exhibits the following features: • Tridion safety cell with high strength steels and low weight: — smart fortwo coupé 160 kg — smart fortwo cabrio 172 kg • Light alloy detachable parts • Left hand and right hand drive versions • Front CMS • Rear CMS • Pedestrian protection
Bodyshell material diagram of the steels used (coupé and cabrio)
Silver areas The silver areas are soft deep drawing steels of regular strength. In these areas all the usual welding methods can be used. Red areas The red areas consist of micro alloyed high strength steels. Resistance spot welding can easily be carried out in these areas. However, metal active gas (MAG) welding can only be done at the approved points. Green area (cabrio only) The green area consists of a particularly high strength and torsionally stiff martensite phase steel. This steel is only used in the cabrio for the window pillars of the A pillars because particularly strin gent demands are made on the strength of the vehicle at these points.
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Body
P60.20 2063 00
Overview of bodyshell materials smart fortwo coupé
P60.20 2064 00
Overview of bodyshell materials smart fortwo cabrio
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Body
Body
Body
Crash management system (CMS)
CMS concept Model series 451 features a bolt on crash manage ment system at the front and rear in the smart fortwo coupé and smart fortwo cabrio. As on the predecessor model series 450, the front CMS is mounted on the longitudinal frame member and the rear CMS on the frame type integral support to avoid damage in the new fortwo. The CMS is a specially shaped steel profile that absorbs impact energy at a defined rate in the low vehicle speed range up to 16 km/h. An additional panel of impact absorbing foam is mounted on the steel profile of the front CMS.
P62.30 2923 00
P64.20 4995 00
Front CMS
Rear CMS
1 Front steel profile 2 Impact absorbing foam
3 Rear steel profile
124
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Body
Sectional repairs
The body of the new model series 451 is designed to permit quick and easy body repairs. The following sectional repairs can be performed on the outer side wall of the smart fortwo coupé:
4 5 6 7 8 9 10 11 B pillar Upper B pillar Side roof paneling Upper A pillar Lower A pillar Front rocker panel Center rocker panel Rear rocker panel
P63.10 4287 00
Outer side wall smart fortwo coupé
The following sectional repairs can be performed on the outer side wall of the smart fortwo cabrio:
12 13 14 15 Front rocker panel Center rocker panel Rear rocker panel B pillar
P.63.10 4288 00
Outer side wall smart fortwo cabrio
Introduction of the smart fortwo, Model Series 451
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Body
Body
Body
P60.00-2776-00
Sectional repair variants for the bodyshell on the smart fortwo coupé
16 17 18 19
Bottom side wall reinforcement Front floor assembly Center floor assembly Upper crossmember 4
20 21 22 23 24
Coupé rear lamp holder Cabrio rear lamp holder Rear floor panel Front longitudinal member Longitudinal member closure plate
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Introduction of the smart fortwo, Model Series 451
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Body
Surfaces and paintwork
General features Galvanized body Cathodic immersion painting Seam sealing Powder paint Tridion cell in two colors: Black as standard equipment or silver as special equipment • Painted CBS (Customized Bodypanel System) components • • • • •
Paint of the Customized Bodypanel System
As in the predecessor model series, the plastic parts of the Customized Bodypanel System (CBS) are either colored or painted plastic. A two coat system of base coat and clearcoat is applied. Paintwork repairs are possible only if the paint coat has not been worn down to the polypropylene (PP) base material. A new paintwork structure can then be built up. Otherwise proper adhesion of the paint on the component cannot be guaranteed.
Introduction of the smart fortwo, Model Series 451
– This printout will not be recorded by the update service. Status: 03 / 2007 –
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Body