Mercedes-Benz A-Class 2021 Operator's Manual page 385

Warning/indicator lamp Possible causes/consequences and
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If the coolant temperature display is at the lower end of the temperature scale:
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If the coolant temperature display is at the upper end of the temperature scale:
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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 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 255).
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Make sure that the air supply to the radiator is not obstructed.
Avoiding high loads on the engine, drive to the nearest qualified specialist workshop. In doing so, ensure that the
coolant temperature display remains below the red area.
Display messages and warning/indicator lamps 383
M M Solutions