Mercedes-Benz GLC 200 4MATIC Owner's Manual page 518

Display messages
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¸
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Restricted during trailer
operation
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Fault Drive at max. 80
km/h
Possible causes/consequences and
* When the trailer socket is occupied, some driving systems will be available only to a limited extent.
Drive carefully if you are towing a trailer or have the bicycle rack mounted.
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* AIRMATIC is functioning only to a limited extent. The vehicle's handling characteristics may be affected.
* NOTE The tyres on the front axle or the 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 in accordance with the traffic conditions, and set a
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higher vehicle level if possible.
Drive in a manner appropriate for the current level, but do not exceed 80 km/h.
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Consult a qualified specialist workshop.
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Solutions
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Display messages and warning/indicator lamps 515