See also:

HDC Hill Descent Control
The concept HDC is a downhill driving assistant that automatically controls vehicle speed on steep downhill gradients. Without applying the brakes, the vehicle moves at slightly more than walking ...

Exterior
BMW says the front-end modifications for 2006 have been "executed with the utmost reserve and subtlety." In addition to the restyled hood, the 7 Series sedans have reshaped rocker panels ...

The concept
The system is functional at speeds beginning at approx. 20 mph/30 km/h. It maintains the speed that was set using the control elements on the steering wheel. The system brakes on downhill gradie ...