Mercedes-Benz S-Class 2023, Operator'S Manual

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Warning/indicator lamp Possible causes/consequences and
M
Solutions
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Coolant warning lamp (yel-
low)
* The yellow coolant warning lamp is lit while the engine is running.
Possible causes are:
R
The temperature sensor is malfunctioning
R
The charge air, transmission oil or battery cooling is faulty
R
The radiator shutters are blocked or defective
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Avoiding high loads on the engine, drive to the nearest qualified specialist workshop.
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Check Engine warning lamp
* The yellow Check Engine warning lamp is lit while the engine is running.
A malfunction has occurred in the engine, the exhaust system or the fuel system.
The emissions limit value may have been exceeded and the engine may be running in emergency operation mode.
In some states, legal requirements stipulate that you must immediately consult a qualified specialist workshop as soon
as the yellow Check Engine warning lamp lights up.
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Have the vehicle checked as soon as possible at a qualified specialist workshop.
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Electrical malfunction warn-
ing lamp
* The red electrical malfunction warning lamp is lit.
There is a malfunction in the electrics.
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Note the messages on the driver's display.
570 Display messages and warning/indicator lamps