Mercedes-Benz SL 550 BlueEFFICIENCY, Operator'S Manual

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Display messages Possible causes/consequences and
M
Solutions
?
Coolant Too Hot
Stop Vehicle Turn
Engine Off
The coolant is too hot.
A warning tone also sounds.
G
WARNING
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
X
Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (
Y
page 154).
X
Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X
Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X
Do not start the engine again until the display message goes out
and the coolant temperature is under 248 ‡ (120 †).
Otherwise, the engine could be damaged.
X
Pay attention to the coolant temperature display.
X
If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †).
Display messages
239
On-board computer and displays
Z