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Display messages
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Check trailer hitch lock
Possible causes/consequences and
* The trailer hitch is not operational during a journey with a trailer.
& WARNING Risk of an accident if the ball neck is not locked
The trailer may become detached.
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 (
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When the display message disappears, couple up the trailer and drive on.
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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
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unlocked ball neck.
Consult a qualified specialist workshop.
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* The trailer hitch will not be operational when the vehicle is stationary.
Uncouple the coupled trailer and secure it against rolling away.
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If the ball neck has been retracted: initiate a new swivel movement (
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The ball neck will engage vertically in the locked position and then engage beneath the bumper.
Display messages and warning/indicator lamps 389
M M
Solutions
page 244).
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page 244).
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