Mercedes-Benz E-Class Convertible, Operator'S Manual

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Engine
Display messages
Possible causes/consequences and M Solutions
* The coolant level is too low.
* NOTE Engine damage due to insufficient coolant
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Avoid long journeys with insufficient coolant.
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Add coolant.
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* The coolant is too hot.
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Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.
& 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.
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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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Wait until the engine has cooled down.
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Make sure that the air supply to the radiator is not obstructed.
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Avoiding high loads on the engine, drive on 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 421