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

See also:
Important features in the engine compartment
1 Vehicle identification number*
2 Jump starting, negative terminal
3 Washer fluid reservoir
4 Jump starting, positive terminal
5 Oil filler neck. 760i/Li: filler neck is located
under a flap. ...
Rear door controls
Roller blind for the side windows
Press the button.
The roller blind can only be extended or retracted
when the side window is closed.
Roller blind for rear window
Press the button.
Raising ...
Remove attached parts following use
Remove unneeded auxiliary mirrors, roof or rear
luggage racks after use.
Attached parts on the vehicle impair the aerodynamics
and increase the fuel consumption. ...
