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

See also:
Shoulder support
Also supports the back in the shoulder area:
Results in a relaxed seating position.
Reduces strain on the shoulder muscles.
...
Capacity
The ski bag can be used to transport up to three
pairs of skis with a length of up to 6 ft/2.10 m or
a snowboard of up to 5 ft/1.60 m. ...
BMW EfficientDynamics: BMW 5-Series increasing the lead.
BMW EfficientDynamics technologies are featured in appropriate combinations
on each model, including features such as Brake Energy Regeneration, Electric
Power Steering, a gearshift point indicato ...
