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Warning/indicator
lamp
?
Coolant warning lamp
Display messages and warning and indicator lamps 267
Possible causes/consequences and
In vehicles without steering-wheel buttons – via the display on
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the on-board computer
In vehicles with steering-wheel buttons – via the analog dis‐
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play on the instrument cluster
Do not restart the engine until the coolant temperature is below
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the specified maximum value. If you do, the engine may be dam‐
aged.
Drive on to the nearest qualified specialist workshop. Avoid high
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engine loads, e.g. driving on hilly roads or stop-and-go driving.
During normal driving and if the coolant level is correct, the coolant
temperature display is permitted to rise to letter
*The red coolant warning lamp is on while the engine is running. A
warning tone also sounds.
The coolant temperature has exceeded the maximum value specified
below. The air supply to the radiator may be impaired or the coolant
level may be too low.
The engine has not been sufficiently cooled and may be damaged.
& WARNING Risk of burns when opening the hood
If you open the hood when the engine has overheated or when
there is a fire in the engine compartment, the following situations
may occur:
You could come into contact with hot gases.
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You could come into contact with other hot, escaping operat‐
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ing fluids.
Before opening the hood, allow the overheated engine to
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cool down.
In the event of a fire in the engine compartment, keep the
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hood closed and call the fire service.
Pay attention to the display messages.
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Stop immediately in accordance with the traffic conditions and
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switch off the engine.
Secure the vehicle against rolling away.
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Exit the vehicle and keep a safe distance from it until the engine
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has cooled down.
Check the coolant level and add coolant, complying with the
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instructions (
page 180).
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If the coolant has to be topped up frequently, have the engine
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cooling system checked at a qualified specialist workshop.
Ensure that the air supply to the radiator is not impaired, e.g. by a
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plastic bag that has been blown onto the grille.
Check the coolant temperature:
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M M
Solutions
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or the red mark.
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