Mercedes-Benz V-Class Operating Instructions Manual page 292

Warning and indicator lamps on the instrument cluster
290
Warning/
indicator
lamp
?
?
N Signal type
Possible causes/consequences and M Solutions
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 malfunctioning.
The coolant is too hot and the engine is no longer being cooled sufficiently.
X
Observe the display messages.
X
Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X
Secure the vehicle to prevent it from rolling away (
X
Exit the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X
Check the coolant level and top up the coolant, observing the warning notes
Y
( page 340).
X
If you have to top up the coolant more frequently, have the engine cooling sys-
tem checked.
X
Make sure that the air supply to the radiator is not obstructed – by frozen slush,
for example.
X
Monitor the coolant temperature gauge in the instrument cluster.
X
Do not start the engine again until the coolant temperature is below 120 †. The
engine could otherwise be damaged.
X
Drive to the nearest qualified specialist workshop.
Avoid heavy loads on the engine, e.g. driving in mountainous terrain, and stop-
start traffic.
N The red coolant warning lamp comes on while the engine is running. A warning
tone also sounds.
The coolant temperature has exceeded 120 †. The airflow to the engine radiator
may be blocked or the coolant level may be too low.
G
WARNING
The engine is not being cooled adequately and could become damaged.
Never drive with an overheated engine. Otherwise, fluids which may have leaked
into the engine compartment could catch fire.
In addition, steam from an overheated engine can cause serious burns, which can
occur just by opening the bonnet.
There is a risk of injury.
X
Observe the display messages.
X
Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X
Secure the vehicle against rolling away (
X
Exit the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X
Check the coolant level and top up the coolant, observing the warning notes
Y
( page 340).
X
If you have to top up the coolant more frequently, have the engine cooling sys-
tem checked.
Y
page 189).
Y
page 189).