Warning/
indicator
lamp
N
N
Signal type
Possible causes/consequences and
M
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 not being cooled sufficiently.
X
Observe the additional display messages in the multifunction display.
X
Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X
Safeguard the vehicle against rolling away (
Y
page 168).
X
Leave 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 335).
X
If you have to top up the coolant frequently, have the engine cooling system
checked.
X
Make sure that the air supply to the engine radiator is not blocked, e.g. by frozen
slush.
X
Do not start the engine again until the coolant temperature is below 120 †. The
engine may otherwise be damaged.
X
Drive to the nearest qualified specialist workshop.
X
Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-start traffic.
?
N
The red coolant warning lamp comes on while the engine is running.
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 sufficiently and may be damaged.
Never drive with an overheated engine. Driving when your engine is overheated
can cause any fluids that may have leaked into the engine compartment to 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 additional display messages in the multifunction display.
X
Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X
Safeguard the vehicle against rolling away (
Y
page 168).
X
Leave 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 335).
X
If you have to top up the coolant frequently, have the engine cooling system
checked.
300
Warning and indicator lamps in the instrument cluster
On-bo
ard
computer
and
displays
