Coolant temperature too high
NOTICE
illuminates together with
There must be a small quantity of coolant in the
tank.
Or:
Do not add coolant when the tank is empty.
·
·
illuminates together with
Report indicates engine overheating.
Stop driving! Seek the help of a specialist garage.
Refuelling
1. Do not continue driving.
2. Stop the engine and allow it to cool.
CAUTION
3. After the indicator light goes out, your journey
can continue.
Risk of scalding!
The cooling system is pressurised.
Engine fault
Do not open the cap of the coolant expansion
tank while the engine is warm. Let the engine
cool down.
·
illuminates together with
1. Place a wipe on the lid of the tank and carefully
unscrew the lid.
Or:
illuminates together with
2. Refill with coolant with the correct specifica-
tion.
1. Do not continue driving!
3. Screw on the cap until it clicks into place.
2. Stop the engine and seek assistance from a spe-
cialist garage.
Specification
Use the G12evo (TL 774 L) coolant to top up.
There is no coolant of the correct specification
available
NOTICE
1. Top up with distilled or demineralised water.
Risk of damage to the cooling system and the en-
gine!
2. Have the correct coolant mixing ratio corrected
by a specialist garage as soon as possible.
Adding coolant that does not conform to the correct
specification can reduce the corrosion protection of
the cooling system.
Another substance was used for topping up, other
than distilled or demineralised water:
— Have the coolant changed by a specialist garage.
It is not possible to top up with a sufficient amount
of coolant
Troubleshooting
Coolant level too low
1. Do not continue driving.
2. Stop the engine and seek assistance from a spe-
cialist garage.
illuminates together with
Or:
There is a loss of coolant
illuminates together with
Message indicates the required coolant
check.
— Top up the coolant and seek assistance from
a specialist garage.
— Check the coolant level.
If the coolant level is OK:
Engine electronics
— Check or change the radiator fan fuse » page 108.
Troubleshooting
If the fuse is OK but the indicator light lights up
again:
Fault in the engine control system
— Do not continue driving! Seek assistance from
a specialist garage.
illuminated
102
Engine, exhaust system and fuel
English 
