Hill Descent Control

Hill Descent Control (HDC) is included on vehicles equipped with the Off-Road Group (sales code AWL). It provides downhill assistance at a safe and controlled rate of speed without requiring the driver to touch the brakes or press a button. This feature operates in low and reverse gears. By means of electronics it replaces the gear reduction and engine braking that a traditional mechanical low-range transfer case provides. For ease of operation, HDC is activated and deactivated automatically according to changes in topography using grade sensing.