2007 BMW 3 Series Owner's Manual - Page 93

HDC Hill Descent Control* HDC is a downhill driving assistant that controls your speed on steep downhill gradients and makes it even easier to control your BMW's handling under these conditions. The vehicle then moves slightly faster than double walking speed without the driver needing to intervene. HDC can be activated as long as you are driving under approx. 20 mph or 35 km/h. When driving downhill at a speed of under approx. 20 mph or 35 km/h, the vehicle's speed is automatically reduced to slightly more than double walking speed and maintained. Deactivating HDC Press the button again; the indicator lamp goes out. HDC is automatically deactivated in the following situations: > At speeds above approx. 40 mph or 60 km/h > After switching off the ignition. Using HDC In cars with manual transmission: Use HDC in lower gears and in reverse gear. With automatic transmission: You can use HDC in any drive position. Increasing or decreasing speed By accelerating or braking you can change the speed within a range from approx. 3 to 15 mph, approx. 5 to 25 km/h. You can specify a target speed within the same range using the cruise control* lever on the steering column. Displays in the instrument cluster* 1 2 Display for target speed HDC display Malfunction 1 2 To increase speed To decrease speed The HDC display disappears during HDC operation, or does not appear: HDC is temporarily unavailable due to excessive brake temperature, or DSC has failed. Activating HDC Drive-off assistant The drive-off assistant enables you to drive off smoothly on uphill gradients. It is not necessary to use the parking brake for this. 1. Hold the car in place by depressing the brake. Press the button; the indicator lamp lights up. The indicator lamp flashes when the vehicle is being braked automatically. 2. Release the brake and drive off without delay. 91 Online Edition for Part no. 01 41 0 013 670 - © 02/07 BMW AG Reference Mobility Communications Entertainment Navigation Driving tips Controls At a glance