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

See also:
BMW X5 xDrive50i: BMW's Twin-Turbocharged V-8.
The new BMW X5 xDrive50i takes its place as the flagship of the X5 family,
yielding 400 horsepower at 5,500 rpm and 450 lb-ft of torque at 1,750 - 4,500
rpm from its twin-turbocharged 4.4 liter V- ...
Under the Hood
Both engines incorporate direct fuel injection and turbocharging. The
xDrive35i uses a new 3.0-liter inline-six-cylinder with one turbocharger, while
the xDrive50i uses a 4.4-liter V-8 with two. P ...
Contacts
Vehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equipment
is also described that is not avai ...
