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

See also:
World firsts
The BMW 7-Series' drivetrain superiority is reinforced with a plethora of
automotive firsts. All BMW 7-Series can now be specified with the world's first
Head-up Display incorporating a speed limi ...
Going & Stopping
The xDrive28i's 3.0-liter, inline-six-cylinder engine is unexpectedly stout,
and it makes this two-ton crossover pretty quick; BMW cites a zero-to-60-mph
acceleration time of 6.7 seconds, and you ...
General driving notes
Closing the trunk lid
Drive with the trunk lid closed
Only drive with the tailgate closed; otherwise,
in the event of an accident or braking or
evasive maneuvers, passengers or other road
use ...
