Mercedes-Benz S-Class 2020 Owner's Manual page 552

Battery
Display messages
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12 V on-board electrical
system Visit workshop
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Stop vehicle See Owner's
Manual
Possible causes/consequences and
* The 12 V on-board electrical system is malfunctioning.
Consult a qualified specialist workshop immediately.
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* The 12 V battery is no longer being charged and the charge level is too low.
* NOTE Possible engine damage if you continue driving
Do not continue driving under any circumstances.
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Consult a qualified specialist workshop.
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Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.
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Switch off the engine.
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Consult a qualified specialist workshop.
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Display messages and warning/indicator lamps 549
M M Solutions