Mercedes-Benz E CLASS 2020 Operator's Manual page 500

498 Display messages and warning/indicator lamps
Warning/indicator lamp Possible causes/consequences and
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If there is an additional warning tone, the coolant temperature has exceeded the maximum permissible temperature.
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If the coolant temperature display is at the lower end of the temperature scale:
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or
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The air supply to the radiator is obstructed
The radiator fan is faulty
& WARNING Danger of burns when opening the hood
If you open the hood when the engine has overheated or during a fire in the engine compartment, you could
come into contact with hot gases or other escaping operating fluids.
Before opening the hood, allow the engine to cool down.
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In the event of a fire in the engine compartment, keep the hood closed and call the fire service.
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Stop the vehicle immediately in accordance with the traffic conditions and switch off the engine. Do not continue
driving under any circumstances.
Note the messages on the multifunction display.
Consult a qualified specialist workshop.
Exit the vehicle and keep a safe distance from it until the engine has cooled down.
Check the coolant level ( page 365).
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Make sure that the air supply to the radiator is not impaired.
M M Solutions