Mercedes-Benz EQS 2021 Operator's Manual page 815

Display messages
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Trailer coupling Check
lock (red display message)
Possible causes/consequences and
Do not couple up the trailer. Drive on without the trailer. Note the reduced ground clearance due to the unlocked
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ball neck.
Consult a qualified specialist workshop.
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* When the vehicle is stationary with a coupled trailer, the trailer hitch is not operational.
Uncouple the coupled trailer and secure it against rolling away.
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If the ball neck has been folded in: unlock the ball neck (
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Swivel the ball neck into the end position manually and let it engage.
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If the ball neck has been folded out: unlock the ball neck (
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Swivel the ball neck beneath the bumper manually and let it engage.
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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 unlocked
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ball neck.
Consult a qualified specialist workshop.
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* 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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Solutions
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page 37).
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ohne
Display messages and warning/indicator lamps 813
page 37).