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

See also:
Safety
Both the coupe and convertible have front airbags plus side-impact airbags
built into the front seats. As required of all 2012 models sold in the U.S., the
640i has standard antilock brakes and an ...
Pairing and connecting cell phone
Pairing the mobile phone
To avoid becoming distracted and posing
an unnecessary hazard both to your own vehicle's
occupants and to other road users, only
pair the mobile phone while the vehicl ...
Changing the list view
The list view changes every time the first symbol
on the navigation bar is pressed.
Information on the channel is displayed
...
