Mercedes-Benz SLC 300 2019 Operator's Manual page 216

Warning and indicator lamps
214
Warning/
N N Signal type
indicator
Possible causes/consequences and M M Solutions
lamp
? N The red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked
or the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooled sufficiently.
X
X
X
X
X
X
X
X
X
X
? N The red coolant warning lamp comes on while the engine is running.
The coolant temperature gage has exceeded the H marking (
airflow to the engine radiator may be blocked or the coolant level may be too
low.
The engine is not being cooled sufficiently and may be damaged.
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
X
X
X
X
X
Observe the additional display messages in the multifunction display.
Pull over and stop the vehicle safely and switch off the engine, paying atten-
tion to road and traffic conditions.
Secure the vehicle against rolling away (
Leave the vehicle and keep a safe distance from the vehicle until the engine
has cooled down.
Check the coolant level and add coolant, observing the warning notes
( page 242).
Y
If you have to add coolant frequently, have the engine cooling system
checked.
Make sure that the air supply to the engine radiator is not blocked, e.g. by
snow, slush or ice.
Do not start the engine again until the coolant temperature gage is below the
H marking ( page 168). Otherwise, the engine could be damaged.
Y
Drive to the nearest qualified specialist workshop.
Avoid heavy loads on the engine as you do so, e.g. driving in mountainous ter-
rain and stop-and-go traffic.
G
WARNING
Observe the additional display messages in the multifunction display.
Pull over and stop the vehicle safely and switch off the engine, paying atten-
tion to road and traffic conditions.
Secure the vehicle against rolling away (
Leave the vehicle and keep a safe distance from the vehicle until the engine
has cooled down.
Check the coolant level and add coolant, observing the warning notes
( page 242).
Y
If you have to add coolant frequently, have the engine cooling system
checked.
page 134).
Y
page 168). The
Y
page 134).
Y