Coolant
Coolant temperature gauge
A
Cold area
›
Avoid high engine speed.
B
Operating range
C
High temperature range
Checking the ll level and topping up
Test conditions
✓ The vehicle is on a horizontal surface
✓ The engine is turned o and cooled
Checking the level
The ll level must be
within the marked range.
›
If the ll level is below
the mark
, top up
the coolant.
NOTICE
Danger of damage to the engine compartment!
▶
Do not top up the coolant above the marked area.
The coolant could be forced out of the cooling sys-
tem when heated.
NOTICE
There must be a small quantity of coolant in the tank.
▶
Do not add coolant when the tank is empty.
▶
Stop driving! Seek the help of a specialist garage.
Relling
CAUTION
Risk of scalding!
The cooling system is pressurised.
▶
Do not open the cap of the coolant expansion tank
while the engine is warm. Let the engine cool
down.
›
Place a wipe on the lid of the tank and carefully un-
screw the lid.
›
Rell with coolant of the correct specication.
›
Screw on the cap until it clicks into place.
Specication
To rell the coolant additive use G12evo (TL 774 L).
NOTICE
Risk of damage to the cooling system and the en-
gine!
Adding coolant that does not conform to the correct
specication can reduce the corrosion protection of
the cooling system.
Troubleshooting
Coolant level is too low
illuminates together with
or
illuminates together with
Message concerning the required coolant
check
›
Check the coolant level.
If the coolant level is OK:
›
Check the fuse for radiator fan, replace if re-
quired » page 160, Replacing a fuse.
If the fuse is OK but the indicator light lights up
again:
›
Stop driving! Seek the help of a specialist garage.
Coolant temperature too high
illuminates together with
or
illuminates together with
Report regarding the engine overheating
›
Stop driving.
›
Stop the engine and allow it to cool.
›
Drive on after the indicator light goes out.
Engine fault
illuminates together with
or
illuminates together with
›
Stop driving!
›
Stop the engine and seek the help of a specialist
garage.
There is no coolant of the correct specication
available
›
Top up with distilled or demineralised water.
›
Have the correct coolant mixing ratio corrected by
a specialist garage as soon as possible.
150
Engine, exhaust system and fuel › Coolant