Mercedes-Benz 2007 CL 550, Operator'S Manual

Page: 521 / 723

518
Operation
Engine compartment
Coolant level
The engine coolant is a mixture of water
and anticorrosion/antifreeze.
When checking the coolant level,
앫
the vehicle must be parked on level
ground
앫
the coolant temperature must be
below 158°F (70°C)
The coolant expansion tank is located on
the passenger side of the engine compart-
ment.
Example illustration from CL 550
1
Cap
2
Coolant expansion tank
왘
Using a rag, turn cap
1
slowly approx-
imately one half turn counterclockwise
to release any excess pressure.
왘
Continue turning the cap counterclock-
wise and remove it.
The coolant level is correct if the level
앫
for cold coolant: reaches the white
marking (plastic bridge) inside the cool-
ant expansion tank
앫
for warm coolant: is approximately
0.6 in (1.5 cm) higher
왘
Add coolant as required.
왘
Replace and tighten cap
1
.
For more information on coolant, see the
“Technical data” section (
컄
page 689).
Warning!
G
In order to avoid potentially serious burns:
앫
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.
앫
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.
앫
Using a rag, slowly open the cap approx-
imately
1
/
2
turn to relieve excess pres-
sure. If opened immediately, scalding
hot fluid and steam will be blown out un-
der pressure.
앫
Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene gly-
col which may burn if it comes into con-
tact with hot engine parts.