The concept

HDC is a downhill driving assistant that automatically controls vehicle speed on steep downhill gradients. The vehicle moves at approximately walking speed without braking intervention by the driver.

You can activate the Hill Descent Control at speeds below approx. 22 mph/35 km/h. When moving downhill at speeds below approx.

22 mph/35 km/h, the vehicle reduces its speed to approximately walking speed, approx. 5 mph/ 8 km/h and keeps it constant.

Only use HDC in transmission positions D or R.

    See also:

    Interior
    Even though it's relatively unchanged for 2009, the X3's interior remains very upscale for this segment. My test car's dark brown leather upholstery and black dashboard made for an especially clas ...

    Fuel gauge
    Fuel tank capacity: approx. 14 US gal/53 liters. You can find information on refueling on page 206. If the tilt of the vehicle varies for a longer period, when you are driving in mountainous ar ...

    Length, wheel base
    Length, wheel base 1 Wheel base: 110.6 inches/2,810 mm 2 Vehicle length: 182 inches/4,624 mm ...