Mercedes-Benz C-Class Saloon 2022 Owner's Manual page 489

486 Display messages and warning/indicator lamps
Display messages
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Vehicle is operational
Switch off vehicle before
exiting
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Trailer coupling Check
lock (white display message)
Possible causes/consequences and
If the driver's display fails, you may not recognise function restrictions affecting systems relevant to safety or the
speed display, for example. The operating safety of the vehicle may be impaired (
Have the vehicle checked by a qualified specialist workshop immediately.
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* You are leaving the vehicle in a ready-to-drive state.
Get out of the vehicle, secure it against rolling away and take the key with you.
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If you do not leave the vehicle, switch off the electrical consumers, e.g. the seat heating. Otherwise, the 12 V
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battery may discharge and starting the engine may be possible only with the help of a second battery (jump start).
* 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 swivelling procedure and do not re-couple the trailer until the display message disappears.
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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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Solutions
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page 299).
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page 334).
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