Mercedes-Benz C-Class Convertible 2021 Operator's Manual page 455

Warning/indicator lamp Possible causes/consequences and
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* The red electrical fault warning lamp is lit.
There is a fault in the electrics.
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Electrical malfunction warn‐
ing lamp
8
* The yellow fuel reserve warning lamp lights up while you are driving.
or
The yellow fuel reserve warning lamp lights up while the engine is running.
Fuel reserve warning lamp
The yellow fuel reserve warning lamp lights up while you are driving:
There has been pressure loss in the fuel system. The fuel filler cap is not closed correctly or the fuel system is leak‐
ing.
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If the fuel filler cap has already been closed correctly:
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The yellow fuel reserve warning lamp lights up while the engine is running:
The fuel supply has dropped into the reserve range.
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M M
Note the messages on the multifunction display.
Close the fuel filler cap.
Consult a qualified specialist workshop.
Refuel.
Display messages and warning/indicator lamps 453
Solutions