See also:

Top-class performance from eight or six cylinders: BMW TwinPower Turbo in the new BMW 6-Series Coupe.
One V8 and one six-cylinder in-line engine are available for the new BMW 6-Series Coupe from market launch, and both can claim unique features. These power units are kitted out with BMW TwinPower ...

The concept
HDC is a downhill driving assistant that automatically controls vehicle speed on steep downhill gradients. Without the brakes being applied, the vehicle moves at slightly more than twice walki ...

Activation/deactivation
Press the button. ...