Mercedes-Benz E-Class Sedan Operator's Manual page 407

Engine
Display messages
?
Possible causes/consequences and
* The coolant level is too low.
* NOTE Engine damage due to insufficient coolant
Avoid long journeys with insufficient coolant.
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Add coolant .
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* The fan motor is malfunctioning.
Avoiding high loads on the engine, drive on to the nearest qualified specialist workshop. In doing so, ensure that
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the coolant temperature display remains below 248 °F (120 °C).
Display messages and warning/indicator lamps 405
M Solutions