Hill Descent Control (HDC)

HDC is a type of low-speed automatic engine brake and makes it possible to increase or decrease the vehicle's speed on steep downhill gradients using only the accelerator pedal, without applying the brakes.

HDC is particularly useful when driving down steep hills with rough surfaces, and where the road may have slippery patches.

 Warning

HDC does not function in all situations, and is a supplementary braking aid. The driver has full responsibility for driving in a safe manner.

Function

HDC allows the vehicle to roll forward or in reverse at very low speed with enhanced engine braking. However, speed can be adjusted to a higher level with the accelerator pedal. When the accelerator pedal is released, the vehicle will return to very low speed regardless of the steepness of the hill and without applying the brakes. The brake lights illuminate when HDC is functioning.

The driver can use the brakes to slow or stop the vehicle at any time.

HDC is activated along with Low Speed Control (LSC), which together make driving on slippery surfaces at low speeds easier.

When HDC and LSC are activated, this changes the response from the accelerator pedal and engine.

Activating HDC

This function can be activated in different ways, depending on how the vehicle is equipped.

Using the drive mode control*

P5-1507-drive mode scroll wheel

Select the Off Road drive mode to activate the function.

Select a different drive mode to turn HDC off. If this is done while the vehicle is on a steep downgrade, engine braking will decrease gradually.

From the center display's Function view

P5-1507-Hill descent control

Models without the drive mode control have a button for Hill Descent Control in the center display's Function view.

  • Tap the button to activate. A light in the button illuminates when the function is activated.

 Note

HDC can be used:
  • Automatic gear shifting: in Drive or Reverse.
  • Manual gear shifting: in gears 1 or 2. It is not possible to manually shift to a higher gear when HDC is active.

 Note

The function is deactivated when driving at higher speeds and must be reactivated at lower speeds if so desired.
  1. * Option/accessory.