Coolant Level - Mercedes-Benz 2008 C-Class Operator's Manual

Coolant level

The engine coolant is a mixture of water
and anticorrosion/antifreeze. To check
the coolant level, the vehicle must be
parked on level ground and the engine
must be cool.
Warning!
In order to avoid potentially serious burns:
Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature gauge indi-
cates that the coolant is overheated.
Do not remove pressure cap on coolant
reservoir if coolant temperature is
above 158°F (70°C). Allow engine to
cool down before removing cap. The
coolant reservoir contains hot fluid and
is under pressure.
Using a rag, slowly open the cap approx-
imately a half-turn to relieve excess
pressure. If opened immediately, scald-
ing hot fluid and steam will be blown out
under pressure.
Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene gly-
col which may burn if it comes into con-
G
tact with hot engine parts.
The coolant expansion tank is located on
the passenger side of the engine compart-
ment.
1 Cap
2 Coolant expansion tank
3 Fluid level bridge
Engine compartment
Using a rag, turn cap 1 slowly approx-
imately a half-turn counterclockwise to
release any excess pressure.
Continue turning the cap 1 counter-
clockwise and remove it.
The coolant level is correct if the level
for cold coolant: reaches the white
marking (plastic bridge) 3 inside the
coolant expansion tank 2
for warm coolant: is approximately
0.6 in (1.5 cm) higher
Add coolant as required.
Replace and tighten cap 1.
For more information on coolant, see the
"Technical data" section ( page 484).
Operation
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