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Lane Keeping Assist
The lane keeping assist system initiates corrective steering intervention to bring the vehicle back into the lane when it detects that the driver is inadvertently straying from the lane or is changing lanes without indicating. The system also alerts the driver by issuing an acoustic and visual warning. The driver can override the corrective steering intervention at any time.
A camera on the windshield (Fig. 108) is used to view the lane markings in order to continuously recalculate the road ahead.
If the system assesses the distance from the lane lines as critical at a speed of over approx. 40 mph (65 km/h), it initiates corrective steering intervention and the vehicle is guided back into the lane. In addition, a warning tone sounds when the vehicle drives over the lane marking and the lane line in question is identified on the multifunction display.
Exceptions for lane keeping assist
Lane keeping assist is not available in the following situations, for example:
Lack of attention
The driver remains responsible at all times when driving, e.g. staying in lane, even if lane keeping assist is on. The system does not replace the driver's attentiveness.
Failure of camera to detect the lane
The camera's view can be reduced by different influencing factors (e.g. rain, snow, ice, heavy water spray and backlight). Sometimes, the camera cannot detect the lane lines, or cannot detect them correctly. When this happens, no steering intervention or an unexpected steering intervention can occur.
No corrective steering intervention in tight bends
On tight bends, corrective steering intervention is not enough to keep the vehicle in the lane. Lane keeping assist is deactivated and there is no corrective steering intervention.