User Manual - Page 488

For 2020 C-Class Sedan C 300.

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Warning/indicator lamp
Possible causes/consequences and M Solutions
Fuel reserve warning lamp If the fuel filler cap has already been closed correctly:
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Visit a qualified specialist workshop.
8
Fuel reserve warning lamp
The yellow fuel reserve warning lamp is lit while the engine is running.
The fuel supply has dropped into the reserve range.
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Refuel.
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Coolant warning lamp
The red coolant warning lamp is lit while the engine is running.
Possible causes are:
R
The temperature sensor is malfunctioning
R
The coolant level is too low
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The air supply to the radia tor is obstructed
R
The radiator fan is faulty
If there is an additional warning tone, the coolant temperature has exceeded the maximum permissible temperature.
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WARNING Danger of burns when opening the hood
If you open the hood when the engine has overheated or during a f ire in the engine compartment, you could come
into contact with hot gases or other escaping operating fluids.
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Before opening the hood, allow the engine to cool down.
488
Display messages and warning/indicator lamps
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