See also:

Manual release
The parking brake can be released manually in the event of a power failure or electrical fault. Before releasing, secure the vehicle against rolling Before releasing the parking brake manually, ...

Resetting the system
Reset the system after each correction of the tire inflation pressure and after every tire or wheel change. 1. "Vehicle Info" 2. "Vehicle status" 3. "Reset" 4. S ...

After the ignition is switched off
The roof can still be operated for approx. 1 minute, as long as no door has been opened. ...