Necessary preliminary work:
Release screws (1).
Remove engine support arm.
BMW X3 Owners Manual > 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 speed.
Hill Descent Control can be activated at
speeds below approx. 22 mph/35 km/h. When
driving downhill, ...