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

See also:
Display on the Control Display
Switching on the backup camera via the
iDrive
With PDC activated:
"Rear view camera"
The backup camera image is displayed. The setting
is stored for the remote control currently in
...
Vehicle battery
Maintenance
The battery is maintenance-free, i.e., the electrolyte
will last for the life of the battery.
Your service center will be glad to advise you on
questions regarding the battery.
Batt ...
Controls
Before operation
Before operating a system using the
integrated universal remote control, ensure that
there are no people, animals, or objects within
the range of movement of the remote-controlle ...
