Mercedes-Benz V-Class 2021 Owner's Manual page 320

Warning/indicator
lamp
6
Fuel reserve warning
lamp
?
Coolant warning lamp
?
Coolant warning lamp
?
Coolant warning lamp
Display messages and warning and indicator lamps 317
Possible causes/consequences and
*The yellow fuel reserve warning lamp is on while the engine is run‐
ning.
The fuel supply has dropped into the reserve range.
Operation of the auxiliary heating (stationary heater) is deactivated in
the reserve range.
Refuel the vehicle.
#
*
The red coolant warning lamp is on while the engine is running and
the coolant temperature display is at the start of the scale.
The temperature sensor for the coolant temperature display is defec‐
tive.
The coolant temperature is no longer being monitored. If the coolant
is too hot, the engine may be damaged.
Stop immediately in accordance with the traffic conditions and
#
switch off the engine. Do not continue driving!
Secure the vehicle against rolling away.
#
Consult a qualified specialist workshop.
#
*The red coolant warning lamp is on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the air supply to the radiator may be
impaired or the radiator's electric fan may be faulty.
The coolant is too hot and the engine is not being adequately cooled.
Pay attention to the display messages.
#
Stop immediately in accordance with the traffic conditions and
#
switch off the engine.
Secure the vehicle against rolling away.
#
Exit the vehicle and keep a safe distance from it until the engine
#
has cooled down.
Check the coolant level and top up with coolant, complying with
#
the instructions (
If the coolant has to be topped up frequently, have the engine
#
cooling system checked at a qualified specialist workshop.
Ensure that the air supply to the radiator is not impaired, e.g. by a
#
plastic bag that has been blown onto the grille.
Monitor the coolant temperature display on the instrument clus‐
#
ter.
Do not restart the engine until the coolant temperature is below
#
120°C. If you do, the engine may be damaged.
Drive on to the nearest qualified specialist workshop. Avoid high
#
engine loads, e.g. driving on hilly roads or stop-and-go driving.
*The red coolant warning lamp is on while the engine is running. A
warning tone also sounds.
The coolant has exceeded the temperature of 120°C. 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.
M M Solutions
page 234).
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