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

See also:
Having possible commands read aloud
You can have the available commands read out
loud for you: ›Voice commands‹
For example, if the "Settings" menu is displayed,
the commands for the settings are read out loud. ...
BMW ActiveHybrid X6
Like other so-called two-mode hybrids, the ActiveHybrid can accelerate
gradually on electric power alone, up to 37 mph in the X6's case. All-wheel
drive and a seven-speed automatic are standard. B ...
Pressure specifications
The tire inflation pressure table, contains all pressure specifications
for the specified tire sizes at the ambient temperature.
Pressure specifications apply to approved
tire sizes and recommen ...
