The function has two activation levels on intervention:
- Steering assistance only
- Steering assistance with brake intervention
Steering assistance only
Intervention with steering assistance
Steering assistance with brake intervention
Intervention with steering assistance and braking
Brake intervention helps in situations where steering assistance alone is not sufficient. The brake force is adapted automatically depending on the situation at the time of road run-off.
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.
When the function intervenes, a message is shown in the driver display.