Mercedes-Benz R 350, Operator'S Manual

Page: 352 / 561

351
Operation
Engine compartment
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.
1
Cap
2
Coolant expansion tank
3
Indicator wall
4
Coolant level
왘
Using a rag, turn cap
1
slowly approx-
imately one half turn counterclockwise
to release any excess pressure.
왘
Continue turning cap
1
counterclock-
wise and remove it.
Coolant level
4
is correct if the level:
앫
for cold coolant: reaches the top of
indicator wall
3
visible through the
filling opening
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 525).
Warning!
G
In order to avoid any possibly 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.