Steering assistance upon risk of run-off

The subfunction's task is to help the driver reduce the risk of the car accidentally leaving the road by actively steering the car back onto the road.

The function is active within the speed range 65-140 km/h (40-87 mph) on roads with clearly visible lane markings/lines.

A camera scans the edges of the road and the painted side markings. If the car is about to leave the side of the road, the car is steered back onto the road and if the steering intervention is not enough to avoid run-off, the brakes are also activated.

However, the function does not intervene with either steering assistance or brake intervention if the direction indicators are used. And if the function detects that the driver is actively driving the car, activation of the function will be delayed.

After automatic engagement, the driver display indicates that this has occurred via a text message:
  • Collision avoidance assistance Automatic intervention


  • The "Steering assistance at risk of lane departure" subfunction is supplementary driver support intended to improve driving safety – it cannot handle all situations in all traffic, weather and road conditions.
  • The function cannot detect barriers, rails or similar obstacles at the side of the road.
  • "Steering assistance at risk of lane departure" is not a substitute for the driver's attention and judgement. The driver is always responsible for ensuring the car is driven in a safe manner, at the appropriate speed, with an appropriate distance to other vehicles, and in accordance with current traffic rules and regulations.