Parking Brake System: Service and Repair

34 41 ... Electromechanical parking brake - emergency release





Necessary preliminary tasks:
^ Remove parking brake actuator on left and right





Important!
Secure vehicle against rolling, e.g. with chocks.





Using an 7 mm WAF Allen key (1), turn back brake caliper spindle in clockwise direction.

Turn back until wheel can turn freely.

Important!
Do not turn the spindle to the end stop.
At the end stop a fault code is set which will cause the system to shut down!
If this is the case, clear the fault memory





Note:
Start-up after circuit interruption:
1. Switch on ignition.
2. Press brake button with brake pedal depressed.
3. The indicator lamp in the instrument cluster goes out as soon as the parking brake is released.