11.4.3 Distance Regulation Control Module - J428-, Removing And Installing

The Distance Regulation Control Module - J428- and/or Distance Regulation Control Module 2 - J850- are installed at the front of the vehicle next to the fog lamps.

The Distance Regulation Control Module - J428- cannot be disassembled and contains the Adaptive Cruise Control Sensor - G550-.

Distance Regulation Control Module 2 - J850- cannot be disassembled and contains the Adaptive Cruise Control Sensor 2.

• Turn off the ignition and all electric consumers and remove the key.
• Remove the front bumper cover. Refer to Body Exterior (Front Bumper Cover; Front Bumper Cover).
• Release and disconnect the connector -2-.
• Remove the nut -1- (20 Nm) and both bolts -4- (20 Nm) and then remove the Distance Regulation Control Module - J428- -3- together with the bracket.

Installing: 

Install in reverse order of removal. Note the following:

The Adaptive Cruise Control (ACC) sensors must be calibrated after:

• Removing, installing or replacing a Distance Regulation Control Module - J428-,
• Every removal and installation, and replacement of assembly carrier,
• If there is a suspicion of forceful impact on these two parts, an accident during driving or similar.

Calibrating the distance regulation (ACC). Refer to 11.5 Distance Regulation (ACC), Calibrating 

• Adapt the ACC when first using or replacing the Distance Regulation Control Module - J428- or Distance Regulation Control Module 2 - J850-. Refer to 11.6 Automatic Distance Regulation, Initializing