See also:

Releasing the parking brake manually
In the event of an electrical power loss or electrical malfunction, you can release the parking brake manually. Secure the vehicle against rolling Before releasing the parking brake manually, ...

Malfunction
The yellow warning lamp flashes and then lights up continuously. A Check Control message is displayed. No flat tire can be detected. Display in the following situations: ► A wheel wi ...

The concept
The parking brake is primarily intended to prevent the vehicle from rolling while parked; it brakes the rear wheels. ...