Mercedes-Benz EQS 2021 Owner's Manual page 459

456 Display messages and warning/indicator lamps
Display messages
Head-up display currently
unavailable See Owner's
Manual
Head-up display inoperative
Head-up display Brightness
currently reduced See Own-
er's Manual
Possible causes/consequences and
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
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unlocked ball neck.
Consult a qualified specialist workshop.
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* The head-up display is temporarily unavailable. Possible causes:
malfunctions in the power supply
R
signal interference
R
Stop in accordance with the traffic conditions and switch the vehicle off and on again.
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If the display message still appears, consult a qualified specialist workshop.
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* The head-up display has an internal error.
Consult a qualified specialist workshop.
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* The brightness of the head-up display is reduced. Possible causes:
Dirt on the windscreen in the camera's field of vision
R
Faulty exterior brightness signals
R
Switch on the windscreen wipers.
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Clean the windscreen if necessary.
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M M Solutions