Parking Brake System: Service and Repair

34 41 ... Electromechanical Parking Brake - Emergency Release







Necessary preliminary tasks:
- Remove EMF actuators on left and right.







IMPORTANT: Secure vehicle against rolling, e.g. with chocks.







Using an 7 mm WAF hexagon socket wrench (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 open circuit:
1. Switch on ignition.
2. Press brake button with brake pedal pressed.
3. The indicator light in the instrument panel goes out as soon as the parking brake is released.