The concept
The parking brake is primarily intended to prevent the vehicle from rolling while parked; it brakes the rear wheels.
See also:
BMW X6: rear seats
The head restraints in the rear cannot be adjusted
and cannot be removed. ...
Engaging the transmission position
▷ Transmission position P can only be disengaged
if the engine is running and the brake
pedal is pressed.
▷ With the vehicle stationary, press on the
brake pedal before shifting out ...
BMW Maintenance System
The maintenance system directs you to required
maintenance measures and thereby supports
you in maintaining road safety and the operational
reliability of the vehicle. ...