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Home >> Smart >> 2012 >> Fortwo Pure >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes - Hydraulic & Mechanical Systems - 451 Chassis >> Testing & Repair >> Remove/install electronic stability program (ESP) control unit - AR42.45-P-0820MCU

Remove/install electronic stability program (ESP) control unit - AR42.45-P-0820MCU

MODEL 451.3/4 

Fig 1: Identifying Electronic Stability Program Control Unit Remove/Install Components
G10978481Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
1 Disconnect battery ground line   AR54.10-P-0003MCC
DANGER 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
2 Raise vehicle using the vehicle lift and remove underfloor paneling Cordless drill/driver, cordless drill  
3 Unclip the brake line to the rear axle from the bracket (1) IMPORTANT In order to prevent the brake lines to the rear axle being permanently deformed when the hydraulic unit (2) is subsequently lowered.  
4 Unclip brake line (3) from the bracket (4)    
5 Loosen nuts (5), unscrew bolts (6) and remove bracket (7) INSTALLATION IMPORTANT : Move guide pin (8) on the hydraulic unit (2) into the bracket (7).
TORQUE SPECIFICATION
*BA42.45-P-1008-01F 
6 Clean hydraulic unit (2) and ESP control unit (N47-5) NOTES Clean the hydraulic unit (2) and ESP control unit (N47-5) carefully in order to avoid damage due to contamination when separating the components.  
7 Unlock retainer of electrical connector (9) and disconnect electrical connector (9) on ESP control unit (N47-5)    
8 Carefully pull the hydraulic unit (2) downwards together with the ESP control unit ESP (N47-5) until the bolts (10) are accessible    
9 Carefully unscrew bolts (10) and remove ESP control unit (N47-5) from the hydraulic unit (2) NOTES It is essential to pay attention to cleanliness. No dirt may enter the ESP control unit (2) and the hydraulic unit (N47-5), otherwise its function may be impaired.
INSTALLATION IMPORTANT : Clean sealing surfaces on the hydraulic unit (2) and on the ESP control unit (N47-5).
Check gasket, replace if necessary.
TORQUE SPECIFICATION
*BA42.45-P-1003-01F 
    SPECIAL TOOL Fig 2
10 Install in the reverse order    
11 Flash the ESP control unit (N47-5) When replacing the ESP control unit (N47-5). AR54.21-P-0012MCU
ELECTRONIC STABILITY PROGRAM (ESP)

Number Designation Model 451.3/4
BA42.45-P-1003-01F Bolt, ESP [Electronic Stability Program] control unit to ESP module Nm 3
BA42.45-P-1008-01F Bolt, ESP hydraulic unit bracket to floor panel Nm 25
Fig 2: Identifying Set Of Torque Tools (452 589 03 99 00)
G10978482Courtesy of MERCEDES-BENZ USA