Mercedes-Benz S-Class Saloon 2021 Owner's Manual page 511

508 Display messages and warning/indicator lamps
508
Display messag Displa y messages es
Please teach in trailer cou-
pling again using the but-
ton in load compartment
Wait for it to extend/
retract
Head-up display currently
unavailable See Owner's
Manual
Head-up display inoperative
Possible causes/conseq P ossible causes/consequences and uences and
If the ball nec If t he ball neck has been e k has been ext xtended:
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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.
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 quali ed specialist workshop.
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* The swivel movement of the trailer hitch is impaired.
Use the button on the boot lid to trigger a new, complete swivel movement until the ball neck engages beneath the
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bumper.
* The head-up display is temporarily unavailable. Possible causes:
malfunctions in the power supply
R
signal interference
R
Stop in accordance with the tra c conditions and switch the vehicle o and on again.
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If the display message still appears, consult a quali ed specialist workshop.
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* The head-up display has an internal error.
Consult a quali ed specialist workshop.
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M M Solutions Solutions
ended: initiate a new swivel movement ( page 327).
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