Mercedes-Benz GLC 2019, Owner'S Manual

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Engine
Warning/indicator lamp Possible causes/consequences and M M Solutions
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Engine diagnosis warning
lamp
The yellow engine diagnostics 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.
#
Have the vehicle checked as soon as possible at a qualified specialist workshop.
Vehicles with a diesel engine: the fuel tank may have been run dry.
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Start the engine three to four times after refuelling.
If the yellow engine diagnosis warning lamp goes out, emergency operation mode is cancelled. The vehicle need not
be checked.
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Electrical fault warning
lamp
The red electrical fault warning lamp is lit.
There is a fault in the electrics.
#
Observe the messages on the multifunction display.
æ
Fuel reserve warning lamp
The yellow fuel reserve warning lamp lights up while the engine is running.
The fuel supply has dropped into the reserve range.
#
Refuel.
590 Display messages and warning/indicator lamps