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

See also:
Deactivating HDC
Press the button again and the
LED goes
out. HDC is automatically deactivated
above approx. 37 mph/60 km/h. ...
Interior: First-class ambience, intelligent functionality.
A generous and versatile spatial concept, high-grade materials and a
characteristic three-dimensional surface design provide the interior of the new
BMW X3 with a modern, premium ambience and inte ...
Compartments in the doors
Do not stow any breakable
objects
Do not store any breakable objects, e. g.
glass bottles, in the compartments, or there is
an increased risk of injury in the event of an accident. ...
