There are two versions of Lane assistance:
- Lane Departure Warning (LDW) - warns the driver with an acoustic signal or vibrations in the steering wheel.
- Lane Keeping Aid (LKA) - steers the car back into its lane and/or warns the driver by an acoustic signal or steering wheel pulsations.
Lane Keeping Aid is active within the speed range 65–200 km/h (40–125 mph) on roads with clearly visible side lines.
On narrow roads the function may be unavailable, in which case it goes into standby mode. The function becomes available again when the road is wide enough.
- Steering assistance activated (LKA only): When the car is approaching a lane line, LKA will actively steer the car back into its lane by applying a slight torque to the steering wheel.
- Warning activated (LDW or LKA): If the car is about to cross a lane line the driver is warned by means of an acoustic signal or vibrations in the steering wheel.
Lane assistance is merely a driver aid and does not engage in all driving situations or traffic, weather or road conditions.
The driver always bears ultimate responsibility for ensuring that the vehicle is driven safely and that applicable laws and road traffic regulations are followed.
A precondition for the functioning of the LKA steering assistance is that the driver’s hands are holding the steering wheel. The system monitors this continuously.
If this is not the case, a symbol and the Lane Assistance Apply steering message will be shown on the driver display, prompting the driver to actively steer the car.
If the driver does not respond to the message to steer the car, an acoustic warning signal sounds and LKA is set in standby mode. The function will then be unavailable until the driver begins steering the car again.
Lane assistance does not intervene
In certain cases, Lane assistance will allow the car to cross lane lines without activating the steering assistance or giving a warning. This occurs when for example the direction indicators are used or when the driver "straightens out" a sharp bend.
In certain demanding conditions Lane assistance may have difficulty helping the driver correctly. In such cases it is recommended to switch off this function.
- road works
- poor road surface
- sharp edges or lines other than the lane lines
- a very “sporty” driving style
- winter road conditions
- poor weather with reduced visibility.