2009 BMW 5 Series Owner's Manual - Page 95

The indicator lamp lights up: DTC is activated. iDrive, for operating principle refer to page 16. 1. Press the button. This opens the start menu. 2. Press the controller to open the menu. 3. Select "Settings" and press the controller. 4. Select "Vehicle / Tires" and press the controller. 5. Change to upper field if necessary. Turn the controller until "HDC" is selected and press the controller. Deactivating DTC Press the button again; the DTC indicator lamp in the instrument cluster goes out. xDrive* xDrive is the 4-wheel drive system of your BMW. The combined effects of xDrive and DSC further optimize the traction and dynamic driving characteristics. The 4-wheel drive system xDrive variably distributes the drive torque to the front and rear axle depending on the driving situation and prevailing road conditions. HDC Hill Descent Control* The concept HDC is a system for driving downhill in steep terrain. This system reduces vehicle speed on steep downhill gradients, thus allowing you to maintain even better control of your BMW under these conditions. The vehicle moves at approximately twice walking speed without active intervention from the driver. HDC is available for activation at vehicle speeds below approx. 22 mph/35 km/h. When driving down steep hills with a speed below approx. 22 mph/35 km/h, the vehicle reduces speed automatically down to approximately twice normal walking speed, approx. 7 mph/12 km/h, and then keeps this speed constant. You can use the accelerator or brakes to vary this automatically controlled speed within a range extending from approx. 3 mph/5 km/h to 15 mph/25 km/h. You can specify a target speed within the same range by using the lever of the cruise control*. 6. Select "HDC on" and press the controller. HDC is shown in the instrument cluster. If the vehicle applies the brakes, a message is displayed on the Control Display for approx. 20 seconds. Deactivating HDC When you use the programmable buttons on the steering wheel or via iDrive, the HDC display goes out. HDC is automatically deactivated at speeds greater than approximately 37 mph/60 km/h. Using HDC Manual transmission: Use HDC in low gears and reverse gear. Automatic transmission: You can use HDC in every drive position. Activating HDC You can activate HDC: > with the programmable buttons on the steering wheel, refer to page 56 > using iDrive 93 Online Edition for Part no. 01 41 2 600 721 - © 08/08 BMW AG Reference Mobility Communications Entertainment Navigation Driving tips Controls At a glance