Mercedes-Benz C-Class Coupe 2019 Operator's Manual page 477

Warning/indicator lamp
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Electrical malfunction warn‐
ing lamp
8
Fuel reserve warning lamp
8
Fuel reserve warning lamp
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Coolant warning lamp
Possible causes/consequences and
The red electrical malfunction warning lamp is lit.
There is a malfunction in the electrics.
Observe the messages on the multifunction display.
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The yellow fuel reserve warning lamp lights up while driving.
There has been pressure loss in the fuel system. The fuel filler cap is not closed correctly or the fuel system is leaking.
Close the fuel filler cap.
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If the fuel filler cap has already been closed correctly:
Visit a qualified specialist workshop.
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The yellow fuel reserve warning lamp is lit while the engine is running.
The fuel supply has dropped into the reserve range.
Refuel.
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The red coolant warning lamp is lit while the engine is running.
Possible causes are:
The temperature sensor is malfunctioning
R
The coolant level is too low
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Display messages and warning/indicator lamps 475
M M Solutions