Mercedes-Benz S-Class 2020, Owner'S Manual

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Display messages
Possible causes/consequences and M M Solutions
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Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.
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Uncouple the trailer and secure it against rolling away.
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Initiate a new swivel movement and do not re-couple the trailer until the warning/indicator lamp goes out.
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Initiate a new swivel movement (
/
page 294).
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When the display message disappears, couple up the trailer and drive on.
If the display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not locked.
#
Do not couple up the trailer. Drive on without the trailer. Note the reduced ground clearance due to the
unlocked ball neck.
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Consult a qualified specialist workshop.
* The trailer hitch will not be operational when the vehicle is stationary.
#
Uncouple the coupled trailer and secure it against rolling away.
#
If the ball neck has been retracted: initiate a new swivel movement (
/
page 294).
The ball neck will engage vertically in the locked position and then engage beneath the bumper.
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If the ball neck has been extended: initiate a new swivel movement (
/
page 294).
The ball neck will engage beneath the bumper.
If the display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not locked.
Display messages and warning/indicator lamps 515