Pilot Assist

Auto-hold braking with driver support

Updated 1/31/2020

Auto-hold braking with driver support

Pilot Assist and Adaptive Cruise Control* (ACCAdaptive Cruise Control) have a special brake function in slow traffic and while stationary.

Braking function in slow traffic and at a standstill

In slow-moving, stop-and-go traffic or when stopped at a traffic light, driving will resume automatically if the vehicle is stopped for less than approx. 3 seconds. If it takes more than 3 seconds for the vehicle ahead to begin moving again, the driver support function will go into standby mode and the auto-hold brake function will activate.

The function can be reactivated by:

  • Pressing the button on the steering wheel keypad.
  • Pressing the accelerator pedal.

The function will resume following the vehicle ahead if it begins to move within approx. 6 seconds.


Driver support can keep the vehicle stationary for no more than 5 minutes – after that time the parking brake is applied and the function is deactivated.

The parking brake must be released before driver support can be reactivated.

Deactivation of the Auto-hold brake function

In certain situations, auto-hold will be deactivated when the vehicle is at a standstill and the function will go into standby mode. This means that the brakes will be released and the vehicle could begin to roll. The driver must actively apply the brakes to keep the vehicle stationary.

This can occur if:

  • the driver depresses the brake pedal
  • the parking brake is applied
  • the gear selector is moved to the P, N or R positions
  • the driver puts the function in standby mode.

Auto Activate Parking Brake

In certain situations, the parking brake will be applied to keep the vehicle at a standstill.

This occurs if the function is keeping the vehicle stationary using the brakes and:

  • the driver opens the door or unbuckles his/her seat belt
  • the function has kept the vehicle at a standstill for more than approx. 5 minutes
  • the brakes overheat
  • the driver switches off the engine manually.

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