Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 526

524 Display messages and warning/indicator lamps
Display messages
Head-up display inoperative
Head-up display Brightness
currently reduced See Own-
er's Manual
Ù
Steering malfunction Drive
carefully Visit workshop
Possible causes/consequences and
* 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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Switch the ignition off and switch it back on.
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If the display message still appears, consult a qualified specialist workshop.
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* A power steering malfunction has occurred. Steering characteristics may be impaired as a result.
Drive on carefully.
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Consult a qualified specialist workshop.
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Solutions
M
P223 0288 02