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

See also:
General information
Front
Two different driver's seat, exterior mirror, and
steering wheel positions can be stored and retrieved
for each remote control. The adjustment
of the lumbar support is not stored.
Rear ...
Summer tires
Do not drive with a tire tread depth of less than
0.12 in/3 mm.
There is an increased danger of hydroplaning if
the tread depth is less than 0.12 in/3 mm. ...
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 ...
