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

See also:
Initializing after a power failure
After a power failure during the opening or closing
process, the roof can only be operated to a
limited extent.
Initializing the system
The system can be initialized when the vehicle
is stationar ...
Vehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equipment
is also described that is not available in a vehicle, ...
Fuel gauge
The vehicle inclination may
cause the display to vary.
Notes on refueling. ...
