Mercedes-Benz S-Class 2019 Operator's Manual page 499

Display messages
Active Lane Keeping Assist
Inoperative
Malfunction Drive at Max.
50 mph
Possible causes/consequences and
Once the cause of the problem is no longer present, driving systems and driving safety systems will be available
again.
If the display message does not disappear:
Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.
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Clean the windshield.
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* Active Lane Keeping Assist is malfunctioning.
Consult a qualified specialist workshop.
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* AIRMATIC is functioning only to a limited extent. The vehicle's handling characteristics may be affected.
* NOTE The tires of the front axle or the front fenders could be damaged by large steering movements
Avoid large steering movements while driving and listen for scraping sounds.
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If you hear scraping sounds, pull over and stop the vehicle safely, paying attention to road and traffic con‐
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ditions, and set a higher vehicle level if possible.
Drive in a manner appropriate for the current level, but do not exceed 50 mph (80 km/h).
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Visit a qualified specialist workshop.
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Active Body Control is malfunctioning. The vehicle's handling characteristics may be affected.
* NOTE The tires of the front axle or the front fenders could be damaged by large steering movements
Avoid large steering movements while driving and listen for scraping sounds.
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Display messages and warning/indicator lamps 497
M M Solutions