450 — fortwo (1998-2007) — Steering¶
Workshop and reference excerpts for 450 — fortwo (1998-2007) in the Steering system.
32 excerpts from 1 sources.
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf¶
GENERAL INFORMATION > EVALUATING STEERING RACK WHEN REPAIRING¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2048 · Applies to: 450, 451, 452, 454 · AR: AR46.40-P-9998MCC, AR46.40-P-9998MCU
ACCIDENT VEHICLES - AH46.20-P-9409-01SM > Model 450.3/4, 451.3/4, 454 In the event of accidents or driving situations of a similar nature (ramming or driving over obstacles) impact- type stresses may cause damage to the steering gear, which is not visible on the outside. Therefore a complete visual inspection with crack tests of the disassembled steering gear must follow. Since most workshops do not have the facilities to perform such a test, the steering should always must be exchanged in case of doubt. In accidents with some slight damage to the body (outer skin panel damage or damaged plastic paneling) the steering can continue to be used, provided that: Parts of the front axle such as steering knuckle, tie rods, drag links, steering gear pitman arm or universal joints may not be damaged. No excessive stress has occurred at the front axle or it has to be assumed that none has occurred. The steering can be turned by hand from lock to lock without seizing up. The steering must be replaced for safety reasons when: The vehicle has suffered frame damage. Visible damage such as permanent deformation or breakages in the steering gear or the mechanical connecting parts from the steering to the steering wheel or from the steering to the wheel. Parts of the front axle have a permanent set or are broken. Excessive stress on the front axle is confirmed by the results of a chassis alignment. Tire, rim, wheel nut or hub cap has a permanent set or is broken. In the event of fire damage, the paint on the steering is charred or bubbled or the boots are deformed or burnt. If, despite defects found, changing the steering is rejected by the customer or insurance company for cost reasons, the customer or insurance company must bear the full responsibility for the further use of the steering gear and all the resultant technical and legal consequences. DC recommends having this confirmed in writing by the customer or insurance company. TESTING & REPAIR > TESTING AND REPAIR WORK: SMART: STEERING - AR46.00-Z- 9451CA > MODEL 451 Remove/install bellows MODEL 451.3/4 AR46.40-P-9998MCC Remove/install bellows MODEL 451.3/4 AR46.40-P-9998MCU
Remove/install clock spring contact¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2049 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-0200MCC, AR46.10-P-0200MCU, AR46.10-P-0400MCC, AR46.10-P-0400MCU, AR46.10-P-8001MCC (+5 more)
MODEL 451.3/4 AR46.10-P-0200MCC Remove/install clock spring contact MODEL 451.3/4 AR46.10-P-0200MCU Remove/install jacket tube MODEL 451.3/4 AR46.10-P-0400MCC Remove/install jacket tube MODEL 451.3/4 AR46.10-P-0400MCU Remove/install paddle shift on steering wheel MODEL 451.3/4 with CODE (I75) Leather sport steering wheel with steering wheel rocker switch system AR46.10-P-8001MCC Remove/install power steering control unit MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) AR46.35-P-1000MCC Remove/install power steering control unit MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) AR46.35-P-1000MCU Remove/install power steering electric motor MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) AR46.35-P-1002MCC Remove/install rack-and-pinion steering MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) AR46.20-P-0600MCB Remove/install rack-and-pinion steering MODEL 451.3/4 except CODE (V26) Power steering, EPS (FFO) AR46.20-P-0600MCC Remove/install steering wheel MODEL 451.3/4 AR46.10-P-0100MCC Remove/install steering wheel spoke covers MODEL 451.3/4 AR46.10-P-0105MCC Remove/install tie rod ball joint MODEL 451.3/4 AR46.40-P-0210MCC Remove/install wiring harness on steering wheel MODEL 451.3/4 AR46.10-P-0150MCC TESTING & REPAIR > REMOVE/INSTALL STEERING WHEEL - AR46.10-P-0100MCC > MODEL 451.3/4
connector (7) and¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2053 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-0150MCC
4 connector (7) and remove steering wheel gear shifter PLUS (S112s1) and steering wheel gear shifter MINUS (S112s2) For vehicles with code (I75) Leather sport steering wheel with steering wheel rocker switch system
5 Unscrew bolt (4) For vehicles with code (I75) Leather sport steering wheel with steering wheel rocker switch system Installation: Carefully tighten bolt (4) and make sure that the front covering (6) is not damaged as otherwise it will have to be replaced.
6 Remove rear covering (3) from steering wheel (2)
7 Undo bolts (5) and remove front covering (6) from steering wheel (2) Installation: Carefully tighten bolts (5) and make sure that the front covering (6) is not damaged as otherwise it will have to be replaced. With code (V27) Cruise control/Temposet release front cover (6), detach electrical connector from cruise control switch at right and then remove front cover (6).
8 Install in the reverse order
TESTING & REPAIR > REMOVE/INSTALL WIRING HARNESS ON STEERING WHEEL - AR46.10-P-0150MCC > MODEL 451.3/4 Shown on the steering wheel with code (I75) Leather sport steering wheel with steering wheel rocker switch system Fig 1: Identifying Steering Wheel Wiring Harness Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Shown on the steering wheel with code (I75) Leather sport steering wheel with steering wheel¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2055 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-0400MCU
rocker switch system Remove/install
1 Remove airbag unit from steering wheel (1)
AR91.60- P- 0660MCU 2 Detach electrical connector (3) at fanfare horns and airbag clock spring contact (A45) The electrical connector (2) of the driver airbag unit must not be detached at the fanfare horns and airbag clock spring contact (A45) as otherwise the fanfare horns and airbag clock spring contact (A45) will have to be replaced.The wiring harness with the electrical connector (3) must not be detached from the steering wheel (1), as otherwise the steering wheel (1) will have to be replaced.
3 Release latches (arrows) of fanfare horns and airbag clock spring contact (A45) by applying suitable screwdriver to steering wheel (1)
4 Remove fanfare horns and airbag clock spring contact (A45) with mounted wiring harness for driver airbag unit
5 Install in the reverse order
TESTING & REPAIR > REMOVE/INSTALL JACKET TUBE - AR46.10-P-0400MCU > Fig 1: Identifying Clock Spring Contact Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
*BA46.10-¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2059 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-8001MCC
P-1003- 01F 11 Loosen boot (12) of the jacket tube (8) from the firewall
12 Remove jacket tube (8) upwards
13 Install in the reverse order
STEERING SHAFT Number Designation Model 451.3/4 BA46.10-P-1001- 01F Bolt, steering coupling to rack-and-pinion steering Nm 20 BA46.10-P-1002- 01F Bolt to upper bearing shell Nm 25 BA46.10-P-1003- 01F Bolt to lower bearing shell Nm 25 TESTING & REPAIR > REMOVE/INSTALL PADDLE SHIFT ON STEERING WHEEL - AR46.10-P-8001MCC > MODEL 451.3/4 with CODE (I75) Leather sport steering wheel with steering wheel rocker switch system
TESTING & REPAIR > REMOVE/INSTALL POWER STEERING CONTROL UNIT - AR46.35-¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2074 · Applies to: 450, 451, 452, 454 · AR: AR46.35-P-1002MCC
P-1000MCU > MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO)
Remove/install
Notes on avoiding damage to electronic components due to electrostatic discharge
AH54.00-P- 0001-01A 1 Remove SAM control unit and place together with attached electrical lines to one side Do not disconnect ground lead from battery. AR54.21-P- 1254MCU 2 Unscrew nuts (1) and remove ground line (2) Replace self-locking nuts (1).
3 Remove power steering control unit (N68)
4 Separate electrical connectors (3)
5 Install in the reverse order
6 Read out fault memory, erase if necessary
Connect STAR DIAGNOSIS and read out fault memory
AD00.00-P- 2000- 04MCC TESTING & REPAIR > REMOVE/INSTALL POWER STEERING ELECTRIC MOTOR - AR46.35-P-1002MCC > MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) Fig 1: Identifying Power Steering Control Unit Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
REPAIR MATERIALS¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2079 · Applies to: 450, 451, 452, 454 · AR: AR46.40-P-0210MCC
Number Designation Order number BR00.45-Z-1059-06A Syntheso GLK 1 grease Q0012978V000000000 TESTING & REPAIR > REMOVE/INSTALL TIE ROD BALL JOINT - AR46.40-P-0210MCC > MODEL 451.3/4 Fig 3: Identifying Holding Device (129 589 01 21 00) Courtesy of MERCEDES-BENZ OF NORTH AMERICA. Fig 4: Identifying Removal Assembly (450 589 02 62 00) Courtesy of MERCEDES-BENZ OF NORTH AMERICA. Fig 1: Identifying Tie Rod Ball Joint Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
BA46.40-P-1002-¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2081 · Applies to: 450, 451, 452, 454 · AR: AR46.40-P-9998MCU
01F Lock nut to tie rod Nm 50 TESTING & REPAIR > REMOVE/INSTALL BELLOWS - AR46.40-P-9998MCU > MODEL 451.3/4 Shown on left boot
Remove/install
Risk of death caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. AS00.00-Z- 0010-01A 1 Raise vehicle using the vehicle lift and remove underfloor paneling Rechargeable drill / screwdriver gotis://G_58.0_01.1
2 Remove left or right tie rod end
AR46.40-P- 0210MCC Installation: Replace clamp (2) and click- Fig 2: Identifying Puller (450 589 01 33 00) Courtesy of MERCEDES-BENZ OF NORTH AMERICA. Fig 1: Identifying Bellows Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Install¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2084 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-0100MCC
6 Install steering wheel with steering wheel rocker switch system
AR46.10-P-0100MCC 7 Activate steering wheel rocker switch system using STAR DIAGNOSIS The software can only be programmed after enable by a transaction number.The order form for enable is available from the Market Performance Center.To activate the steering wheel rocker switch system follow the instructions in STAR DIAGNOSIS.
Connect STAR DIAGNOSIS and read out fault memory
AD00.00-P-2000- 04MCC 8 Conduct function test of steering wheel rocker switch system
9 Add special equipment to the vehicle data card and to the online vehicle data card Code (I75) Leather sport steering wheel with steering wheel rocker switch system to be added.
TORQUE SPECIFICATIONS > TIGHTENING TORQUES: SMART: STEERING - BA46.00-Z- 9999CZ > MODEL all Steering gear MODEL 454.0 BA46.20-P-1000-01H Steering gear MODEL 450.3 /4, 451.3 /4, 452.3 /4 BA46.20-P-1000- 01G Steering shaft MODEL 450.3 /4, 451.3 /4, 452.3 /4 BA46.10-P-1000-01F Steering wheel MODEL 450.3 /4 BA46.10-P-1000-02E Steering wheel MODEL 450.3 /4, 451.3 /4, 452.3 /4 BA46.10-P-1000- 02D Steering wheel, jacket tube, steering shaft MODEL 454.0 BA46.10-P-1000-05A Tie rod MODEL 450.3 /4, 451.3 /4, 452.3 /4 BA46.40-P-1000-01F Tie rod MODEL 454.0 BA46.40-P-1000-01I TORQUE SPECIFICATIONS > STEERING SHAFT - BA46.10-P-1000-01F > Model 450, 451, 452
BASIC KNOWLEDGE > ELECTRIC STEERING, FUNCTION - GF46.35-P-0002MCU >¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2087 · Applies to: 450, 451, 452, 454 · AR: GF46.35-P-0002MCU
MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) General The electric steering is based on a conventional rack and pinion steering gear which is assisted by the power steering motor. The steering power assistance takes place steplessly and speed-dependent. Functions Power steering assistance Steering reset assistance "active center feeling" function Function requirements Circuit 15 On Engine speed > 500 RPM No overvoltage or undervoltage The steering assist control unit requires the following information to calculate the steering power assistance: Steering torque from torque sensor Vehicle speed via CAN from ESP control unit Fig 1: Electric Steering Function Diagram Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Steering angle and steering speed via CAN from steering angle sensor¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2088 · Applies to: 450, 451, 452, 454 · AR: PE46.35-P-2000MCU, GF54.30-P-6000MCU, GF46.35-P-5100MCC, GF46.35-P-6600MCC, GF07.61-P-6000MCU
Engine speed via CAN from motor electronics control unit Steering power assistance By turning the steering wheel a torque on the control rod is produced by which is recorded by the torque sensor and passed on to the power steering control unit. By means of the steering torque determined, the steering angle and vehicle speed the assistance torque is established by the steering assist control unit and the power steering motor actuated accordingly. This assists the driver's steering torque at the drive pinion of the rack-and-pinion steering via a worm gear. The direction of rotation of the power steering motor depends on the direction of motion of the steering wheel. The steering power assistance is at a maximum at low speeds and when the vehicle is stationary and decreases as the vehicle speed increases. Once the engine is switched off and the vehicle stops the steering power assistance is deactivated in steps after approx. 3 s. Steering reset assistance The steering reset is introduced due to the shaft kinematics (after-run). As a result the power steering motor is excited passively and operates as a generator. On the basis of this signal the power steering control unit detects the assistance requirement and assists the return force by the corresponding energizing of the power steering motor. "active center feeling" function When the steering wheel center position is detected and in the absence of steering movements, the power steering motor is energized by the power steering control unit so that an adequate torque is produced in order to hold the steering in the center position. As a result the driver has an improved "feel" for the center position of the steering. Limp-home function The steering assist control unit permanently checks all input signals for plausibility. In the event of a faulty component the power steering assistance is switched off, a fault is stored in the power steering control unit and the electric steering indicator lamp in the instrument cluster is actuated. Actuation takes place by the power steering control unit via CAN. The steering then continues to function as a conventional rack-and-pinion steering.
Electric steering, location of components
GF46.35-P-0002- 01MCU Wiring diagram of electric steering
PE46.35-P-2000MCU
Instrument cluster, component description A1 GF54.30-P-6000MCU
Electric steering torque sensor, component description B23 GF46.35-P-5100MCC
Electric steering actuator motor, component description M19 GF46.35-P-6600MCC
ME-SFI [ME] control unit, component description N3/10 GF07.61-P-6000MCU
BASIC KNOWLEDGE > ELECTRIC STEERING ACTUATOR MOTOR, COMPONENT¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2090 · Applies to: 450, 451, 452, 454 · AR: GF46.35-P-6600MCC, GF46.35-P-7100MCU
DESCRIPTION - GF46.35-P-6600MCC > MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) Location The power steering motor is located on the steering gear. Task The power steering motor assists the steering torque applied by the driver via a worm gear. In the process the direction of rotation of the motor depends on the direction of rotation of the steering gear. If no torque is detected at the drag link and the steering wheel is not in the center position, the power steering motor assists the resetting of the steering wheel into the center position. The power steering motor is actuated via the steering assist control unit (N68). BASIC KNOWLEDGE > ELECTRIC STEERING CONTROL UNIT, COMPONENT DESCRIPTION - GF46.35-P-7100MCU > MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) Fig 1: Locating Power Steering Motor Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Location¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2091 · Applies to: 450, 451, 452, 454 · AR: GF46.35-P-9998MCU
The steering assist control unit is located on the left at the top of the vehicle firewall. Task The power steering control unit takes over control of the power steering motor (M19). The following signals are read in for this: Via Controller Area Network (data bus/CAN bus) (CAN): Vehicle speed from ESP control unit (N47-5) Steering angle and steering speed from steering angle sensor (N49) Direct signals: Steering torque from power steering torque sensor (B23) Resetting request from power steering motor By means of the input signals the steering assist control unit determines the direction of rotation and current intensity of the power steering motor (M19) and permanently checks all input signals for plausibility. In the event of a faulty signal the electric steering is switched off, the respective fault is stored in the internal fault memory and the electric steering indicator lamp in the (A1e18) instrument cluster (A1) is actuated. BASIC KNOWLEDGE > OVERVIEW OF SYSTEM COMPONENTS, ELECTRIC STEERING - GF46.35-P-9998MCU > MODEL 451.3/4 with CODE (V26) Power steering, EPS (FFO) Fig 1: Locating Steering Assist Control Unit Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
WIRING DIAGRAMS > STEERING WHEEL WIRING DIAGRAM - PE46.10-P-2102MCU >¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2098 · Applies to: 450, 451, 452, 454 · AR: PE46.10-P-2102MCU, OV00.01-P-1901MCU, GF00.19-P-1000MCU, GF00.19-P-2000MCU, GF00.19-P-3000MCU (+3 more)
MODEL 451 Steering wheel wiring diagram PE46.10-P-2102-97MCU Use of wiring diagrams OV00.01-P-1901-03MCC Search aid for all wiring diagram groups OV00.01-P-1901MCU Abbreviations for wiring diagrams OV00.01-P-1001-27MC Abbreviations of signal and circuit designations for wiring diagrams OV00.01-P-1001-28MC Location and assignment of line and plug connectors GF00.19-P-1000MCU Location and assignment of ground points GF00.19-P-2000MCU Location and assignment of Z connector sleeves (line connectors in wiring harness) GF00.19-P-3000MCU Engine 132Further wiring diagrams PE07.00-P-1100MCU Engine 780.009Further wiring diagrams PE08.00-P-1100MCC Transmission 717 (except model 451.391 /491)Further wiring diagrams PE26.00-P-1100MCU Fig 1: Electric Steering - Wiring Diagram Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
WIRING DIAGRAMS > WIRING DIAGRAM OF ELECTRIC STEERING - PE46.35-P-2000MCU¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2101 · Applies to: 450, 451, 452, 454 · AR: PE46.35-P-2000MCU, OV00.01-P-1901MCU, GF00.19-P-1000MCU, GF00.19-P-2000MCU, GF00.19-P-3000MCU (+1 more)
MODEL 451 Wiring diagram of electric steering PE46.35-P-2000-99MCU Legend for electric wiring diagram of hinged power windows PE46.35-P-2000-60MCU Use of wiring diagrams OV00.01-P-1901-03MCC Search aid for all wiring diagram groups OV00.01-P-1901MCU Abbreviations for wiring diagrams OV00.01-P-1001-27MC Abbreviations of signal and circuit designations for wiring diagrams OV00.01-P-1001-28MC Location and assignment of line and connectors GF00.19-P-1000MCU Location and assignment of ground points GF00.19-P-2000MCU Location and assignment of Z connector sleeves (line connectors in wiring harness) GF00.19-P-3000MCU Further wiring diagrams PE54.00-P-1100MCU Fig 1: Electric Steering - Wiring Diagram Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
MAINTENANCE > CHECK TRACK ROD AND DRAG LINK LINKAGE FOR PLAY, CHECK¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2103 · Applies to: 450, 451, 452, 454 · AR: AP46.00-P-4653MCU
RUBBER BOOTS - AP46.00-P-4653MCU > MODEL 451.3 /4 Removing
Risk of death caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. AS00.00- Z-0010- 01A 1 Raise vehicle using the vehicle lift and remove underfloor paneling Rechargeable drill / screwdriver
Checking
2 Stretch boot (1) by turning the steering onto left and right lock while checking for damage Never check boots (1) by pressing in or around the raised beads as this leaves behind damage on the plastic and leads to leaks in the long-term.If necessary: ↓Replace boot (1)
subject to separate repair order. AR46.40- P- 9998MCU 3 Check ball joint of the left and right tie rod end (3) for play by firmly pulling and pushing If necessary: ↓
Replace tie rod end (3) subject to separate repair order. AR46.40- P- 0210MCC 4 Check left and right rubber boot (2) on tie rod end (3) for leaks If necessary: ↓
Replace tie rod end (3) AR46.40- Fig 1: Identifying Bellows, Tie Rod End And Rubber Boot Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
and condition¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2104 · Applies to: 450, 451, 452, 454 · AR: AR46.40-P-9998MCC, AR46.40-P-9998MCU, AR46.10-P-0200MCC, AR46.10-P-0200MCU, AR46.10-P-0400MCC (+5 more)
subject to separate repair order. P 0210MCC Install
5 Install underfloor panelings and lower the vehicle with the vehicle lift
TESTING & REPAIR > TESTING AND REPAIR WORK: SMART: STEERING - AR46.00-Z- 9451CA > MODEL 451 Remove/install bellows MODEL 451.3 /4 AR46.40-P-9998MCC Remove/install bellows MODEL 451.3 /4 AR46.40-P-9998MCU Remove/install clock spring contact MODEL 451.3 /4 AR46.10-P-0200MCC Remove/install clock spring contact MODEL 451.3 /4 AR46.10-P-0200MCU Remove/install jacket tube MODEL 451.3 /4 AR46.10-P-0400MCC Remove/install jacket tube MODEL 451.3 /4 AR46.10-P-0400MCU Remove/install paddle shift on steering wheel MODEL 451.3 /4 with CODE (I75) Leather sport steering wheel with steering wheel rocker switch system AR46.10-P-8001MCC Remove/install power steering control unit MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) AR46.35-P-1000MCC Remove/install power steering control unit MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) AR46.35-P-1000MCU Remove/install power steering electric motor MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) AR46.35-P-1002MCC Remove/install rack-and-pinion steering MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) AR46.20-P-0600MCB Remove/install rack-and-pinion steering MODEL 451.3 /4 except CODE (V26) Power steering, EPS (FFO) AR46.20-P-0600MCC Remove/install steering wheel MODEL 451.3 /4 AR46.10-P-0100MCC Remove/install steering wheel spoke covers MODEL 451.3 /4 AR46.10-P-0105MCC Remove/install tie rod ball joint MODEL 451.3 /4 AR46.40-P-0210MCC
Remove/install wiring harness¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2105 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-0150MCC, AR46.10-P-0100MCC
on steering wheel MODEL 451.3 /4 AR46.10-P-0150MCC TESTING & REPAIR > REMOVE/INSTALL STEERING WHEEL - AR46.10-P-0100MCC > MODEL 451.3 /4
Remove/install
Risk of injury caused by performing testing or repair work on airbag or emergency tensioning retractor units. Store airbag units with deployment side facing up; do not expose to temperatures greater than 100°C. When working on these units, disconnect the power supply. AS91.00- Z-0001- 01A Notes on performing repair, body work and welding on vehicles with airbags and ETR units
AH91.00- P-0002- 01SM Legal requirements on handling and storing airbags and emergency
AH91.00- P-0004- Fig 1: Identifying Steering Wheel Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
wheel gear shifter PLUS¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2108 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-0150MCC
3 wheel gear shifter PLUS (S112s1) and steering wheel gear shifter MINUS (S112s2) until the electrical connector (7) is accessible For vehicles with code (I75) Leather sport steering wheel with steering wheel rocker switch system
4 Detach electrical connector (7) and remove steering wheel gear shifter PLUS (S112s1) and steering wheel gear shifter MINUS (S112s2) For vehicles with code (I75) Leather sport steering wheel with steering wheel rocker switch system
5 Unscrew bolt (4) For vehicles with code (I75) Leather sport steering wheel with steering wheel rocker switch system Installation: Carefully tighten bolt (4) and make sure that the front covering (6) is not damaged as otherwise it will have to be replaced.
6 Remove rear covering (3) from steering wheel (2)
7 Undo bolts (5) and remove front covering (6) from steering wheel (2) Installation: Carefully tighten bolts (5) and make sure that the front covering (6) is not damaged as otherwise it will have to be replaced. With code (V27) Cruise control/Temposet release front cover (6), detach electrical connector from cruise control switch at right and then remove front cover (6).
8 Install in the reverse order
TESTING & REPAIR > REMOVE/INSTALL WIRING HARNESS ON STEERING WHEEL - AR46.10-P-0150MCC > MODEL 451.3 /4 Shown on the steering wheel with code (I75) Leather sport steering wheel with steering wheel rocker switch system
horns and airbag¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2111 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-0400MCU
4 horns and airbag clock spring contact (A45) with mounted wiring harness for driver airbag unit
5 Install in the reverse order
TESTING & REPAIR > REMOVE/INSTALL JACKET TUBE - AR46.10-P-0400MCU > MODEL 451.3 /4 Fig 1: Identifying Jacket Tube Components (1 Of 3) Courtesy of MERCEDES-BENZ OF NORTH AMERICA. Fig 2: Identifying Jacket Tube Components (2 Of 3) Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
*BA46.10-¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2114 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-8001MCC
P-1003- 01F 11 Loosen boot (12) of the jacket tube (8) from the firewall
12 Remove jacket tube (8) upwards
13 Install in the reverse order
STEERING SHAFT Number Designation Model 451.3/4 BA46.10-P-1001-01F Bolt, steering coupling to rack-and-pinion steering Nm 20 BA46.10-P-1002-01F Bolt to upper bearing shell Nm 25 BA46.10-P-1003-01F Bolt to lower bearing shell Nm 25 TESTING & REPAIR > REMOVE/INSTALL PADDLE SHIFT ON STEERING WHEEL - AR46.10-P-8001MCC > MODEL 451.3 /4 with CODE (I75) Leather sport steering wheel with steering wheel rocker switch system Fig 1: Identifying Steering Wheel, Bolt, Electrical Connector And Steering Wheel Gear Shifter Plus And Minus Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Remove/install¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2129 · Applies to: 450, 451, 452, 454 · AR: AR46.35-P-1002MCC
Notes on avoiding damage to electronic components due to electrostatic discharge
AH54.00-P- 0001-01A 1 Remove SAM control unit and place together with attached electrical lines to one side Do not disconnect ground lead from battery. AR54.21-P- 1254MCU 2 Unscrew nuts (1) and remove ground line (2) Replace self-locking nuts (1).
3 Remove power steering control unit (N68)
4 Separate electrical connectors (3)
5 Install in the reverse order
6 Read out fault memory, erase if necessary
Connect STAR DIAGNOSIS and read out fault memory
AD00.00-P- 2000- 04MCC TESTING & REPAIR > REMOVE/INSTALL POWER STEERING ELECTRIC MOTOR - AR46.35-P-1002MCC > MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) Fig 1: Identifying Power Steering Control Unit Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
REPAIR MATERIALS¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2134 · Applies to: 450, 451, 452, 454 · AR: AR46.40-P-0210MCC
Number Designation Order number BR00.45-Z-1059-06A Syntheso GLK 1 grease Q0012978V000000000 TESTING & REPAIR > REMOVE/INSTALL TIE ROD BALL JOINT - AR46.40-P-0210MCC > MODEL 451.3 /4 MODIFICATION NOTES 4.11.08 Wheel alignment check with recording of vehicle level, added Step 6
Remove/install
Notes on self-locking nuts and bolts
AH00.00- N-0001- 01A Risk of death caused by vehicle slipping or toppling Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle AS00.00- Z-0010- 01A Fig 4: Identifying Removal Assembly (450 589 02 62 00) Courtesy of MERCEDES-BENZ OF NORTH AMERICA. Fig 1: Identifying Tie Rod Ball Joint Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
TESTING & REPAIR > REMOVE/INSTALL BELLOWS - AR46.40-P-9998MCU >¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2136 · Applies to: 450, 451, 452, 454 · AR: AR46.40-P-9998MCU
MODEL 451.3 /4 Shown on left boot
Remove/install
Risk of death caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. AS00.00- Z-0010- 01A 1 Raise vehicle using the vehicle lift and remove underfloor paneling Rechargeable drill / screwdriver
2 Remove left or right tie rod end
AR46.40- P- 0210MCC Installation: Replace clamp (2) and click-model clamp (3). Installation: The shackle on the clamp Fig 2: Identifying Puller (450 589 01 33 00) Courtesy of MERCEDES-BENZ OF NORTH AMERICA. Fig 1: Identifying Bellows Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
BASIC KNOWLEDGE > ELECTRIC STEERING, FUNCTION - GF46.35-P-0002MCU >¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2142 · Applies to: 450, 451, 452, 454 · AR: GF46.35-P-0002MCU
MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) Fig 1: Identifying Electric Steering Components Courtesy of MERCEDES-BENZ OF NORTH AMERICA. Fig 1: Electric Steering Function Diagram Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Limp-home function¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2144 · Applies to: 450, 451, 452, 454 · AR: PE46.35-P-2000MCU, GF54.30-P-6000MCU, GF46.35-P-5100MCC, GF46.35-P-6600MCC, GF07.61-P-6000MCU (+5 more)
The steering assist control unit permanently checks all input signals for plausibility. In the event of a faulty component the power steering assistance is switched off, a fault is stored in the power steering control unit and the electric steering indicator lamp in the instrument cluster is actuated. Actuation takes place by the power steering control unit via CAN. The steering then continues to function as a conventional rack-and-pinion steering.
Electric steering, location of components
GF46.35-P-0002- 01MCU Wiring diagram of electric steering
PE46.35-P-2000MCU
Instrument cluster, component description A1 GF54.30-P-6000MCU
Electric steering torque sensor, component description B23 GF46.35-P-5100MCC
Electric steering actuator motor, component description M19 GF46.35-P-6600MCC
ME-SFI [ME] control unit, component description N3/10 GF07.61-P-6000MCU
ESP control unit, component description N47- 5 GF42.45-P-5118MCU
Steering angle sensor, component description N49 GF42.45-P-5107MCC
Electric steering control unit, component description N68 GF46.35-P-7100MCU BASIC KNOWLEDGE > TABLE OF CONTENTS FOR FUNCTION DESCRIPTION OF ELECTRIC STEERING - GF46.35-P-0998MCU > MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO)
Electric steering, function GF46.35-P-0002MCUE
Electric steering, location of components GF46.35-P-0002-01MCU Wiring diagram of electric steering PE46.35-P-2000MCU
Overview of system components, electric steering GF46.35-P-9998MCU BASIC KNOWLEDGE > ELECTRIC STEERING TORQUE SENSOR, COMPONENT DESCRIPTION - GF46.35-P-5100MCC > MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO)
Location¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2145 · Applies to: 450, 451, 452, 454 · AR: GF46.35-P-6600MCC
The torque sensor is located on the drag link and is integrated in the steering gear. Task By turning the steering wheel a torque is produced in control rod which is read in by the torque sensor, converted into a voltage signal and passed on to the power steering control unit (N68). BASIC KNOWLEDGE > ELECTRIC STEERING ACTUATOR MOTOR, COMPONENT DESCRIPTION - GF46.35-P-6600MCC > MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) Fig 1: Identifying Power Steering Torque Sensor Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Location¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2146 · Applies to: 450, 451, 452, 454 · AR: GF46.35-P-7100MCU
The power steering motor is located on the steering gear. Task The power steering motor assists the steering torque applied by the driver via a worm gear. In the process the direction of rotation of the motor depends on the direction of rotation of the steering gear. If no torque is detected at the drag link and the steering wheel is not in the center position, the power steering motor assists the resetting of the steering wheel into the center position. The power steering motor is actuated via the steering assist control unit (N68). BASIC KNOWLEDGE > ELECTRIC STEERING CONTROL UNIT, COMPONENT DESCRIPTION - GF46.35-P-7100MCU > MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) Fig 1: Identifying Power Steering Motor Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Location¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2147 · Applies to: 450, 451, 452, 454 · AR: GF46.35-P-9998MCU
The steering assist control unit is located on the left at the top of the vehicle firewall. Task The power steering control unit takes over control of the power steering motor (M19). The following signals are read in for this: Via Controller Area Network (data bus/CAN bus) (CAN): Vehicle speed from ESP control unit (N47-5) Steering angle and steering speed from steering angle sensor (N49) Direct signals: Steering torque from power steering torque sensor (B23) Resetting request from power steering motor By means of the input signals the steering assist control unit determines the direction of rotation and current intensity of the power steering motor (M19) and permanently checks all input signals for plausibility. In the event of a faulty signal the electric steering is switched off, the respective fault is stored in the internal fault memory and the electric steering indicator lamp in the (A1e18) instrument cluster (A1) is actuated. BASIC KNOWLEDGE > OVERVIEW OF SYSTEM COMPONENTS, ELECTRIC STEERING - GF46.35-P-9998MCU > MODEL 451.3 /4 with CODE (V26) Power steering, EPS (FFO) Fig 1: Identifying Steering Assist Control Unit Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
WIRING DIAGRAMS > STEERING WHEEL WIRING DIAGRAM - PE46.10-P-2102MCU >¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2152 · Applies to: 450, 451, 452, 454 · AR: PE46.10-P-2102MCU
MODEL 451 PE46.10- P-2102- 97MCU Steering wheel wiring diagram
PE46.10- P-2102- 97MCU OV00.01- P-1901- 03MCC Use of wiring diagrams
OV00.01- P-1901- 03MCC OV00.01- P- 1901MCU Search aid for all wiring diagram groups
OV00.01- P- 1901MCU OV00.01- OV00.01- Fig 3: Steering Wheel Wiring Diagram (3 Of 3) Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
WIRING DIAGRAMS > WIRING DIAGRAM OF ELECTRIC STEERING - PE46.35-P-2000MCU¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2157 · Applies to: 450, 451, 452, 454 · AR: PE46.35-P-2000MCU
MODEL 451 PE46.35-P- 2000-99MCU Wiring diagram of electric steering
PE46.35-P- 2000-99MCU PE46.35-P- 2000-60MCU Legend for electric wiring diagram of hinged power windows
PE46.35-P- 2000-60MCU OV00.01-P- 1901-03MCC Use of wiring diagrams
OV00.01-P- 1901-03MCC OV00.01-P- 1901MCU Search aid for all wiring diagram groups
OV00.01-P- 1901MCU OV00.01-P- 1001-27MC Abbreviations for wiring diagrams
OV00.01-P- 1001-27MC Fig 2: Electric Stability Program Wiring Diagram (2 Of 2) Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
dashboard on driver's side¶
2007-2014 smart (450_451_452_454) - Workshop Repair Manual.pdf · p. 2996 · Applies to: 450, 451, 452, 454 · AR: AR46.10-P-0400MCU, AR88.00-P-1010MCC
31.8.10. 3 Loosen steering column tube from crossmember (1), tie upward with cable tie and cover with rag.
AR46.10-P-0400MCU 4 Mark installation position of crossmember (1) on both A-pillars with suitable pen. Only if markings are not removed during further repair, such as repair on A-pillar.
5 Remove front CBS
AR88.00-P-1010MCC 6 Unscrew nuts (2) from brackets (3) and remove bracket (3).
7 Remove protective foils above bolts (4, 5, 6, 7)
8 Disconnect electrical connectors (8) from power window convenience feature control unit (N57/2) On vehicles with code (V43) Power window
9 Disconnect electrical connectors (14) from restraint systems control unit (N2/7)
10 Loosen wiring harness on crossmember (1) and expose. Observe installation position of wiring harness on crossmember (1).
11 Unscrew bolts (13) on vertical strut (12) from crossmember (1).
12 Unscrew bolts (16) on diagonal strut (15) from crossmember (1).
13 Close doors
14 Unscrew bolts (6, 7) Ensure that bolts (6, 7) do not fall into A-pillar opening.
15 Unscrew bolts (4, 5) Ensure that bolts (4, 5) do not fall into A-pillar opening.
16 Open doors, slide assembly wedge (10) downward and remove crossmember (1) from vehicle with aid of helper.
17 Remove sheet metal nuts from crossmember (1). When replacing crossmember (1). Eight sheet metal nuts are on the crossmember (1).