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

See also:
Active Protection - preventative occupant protection
The Active Protection safety package is making its debut in the new BMW
3-Series Sedan under the banner of BMW ConnectedDrive. This assistance system is
activated shortly after the driver pulls aw ...
Capacities
...
Advanced chassis technology and optional Adaptive Drive deliver the perfect
balance of sports performance and comfort.
The driving experience in the new BMW 6-Series Coupe is defined by sporty
handling characteristics. However, the cutting-edge chassis technology of the
two-door car also delivers impressive ride c ...
