See also:

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

Brake Energy Regeneration: an energy-saving innovation.
The new BMW 5-Series sedan continues the roll-out of BMW's Brake Energy Regeneration system on US models. To save energy and reduce the vehicle's fuel consumption over time, this system manages th ...

Cruise control
The conceptYou can use the cruise control feature beginning at approx. 20 mph/30 km/h. The car then stores and maintains the speed that you specify using the lever on the steering column. Do not ...