Mercedes-Benz C-Class Operator's Manual page 281

engine or to the catalytic converter. Have
excess engine oil siphoned off.
Example
Turn cap : counter-clockwise and remove
X
it.
Add engine oil.
X
If the oil level is at or below the MIN mark on
the oil dipstick, add 1.1 US qt (1.0 l) of
engine oil.
Replace cap : on the filler neck and turn
X
clockwise.
Ensure that the cap locks into place
securely.
Check the oil level again with the oil dip-
X
stick ( page 277).
Y
Further information on engine oil
( page 352).
Y
Additional service products
Checking coolant level
G
WARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
Engine compartment
G
WARNING
The engine cooling system is pressurized, par-
ticularly when the engine is warm. When
opening the cap, you could be scalded by hot
coolant spraying out. There is a risk of injury.
Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape.
Park the vehicle on a level surface.
X
Only check the coolant level when the vehi-
cle is on a level surface and the engine has
cooled down.
Turn the SmartKey to position 2 in the igni-
X
tion lock ( page 137).
Y
or
On vehicles with KEYLESS-GO, press the
X
Start/Stop button twice (
Check the coolant temperature display in
X
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
Turn the SmartKey to position 0 in the igni-
X
tion lock ( page 137).
Y
or
On vehicles with KEYLESS-GO, pull the
X
Start/Stop button from the ignition lock
( page 138).
Y
Slowly turn cap : half a turn counter-
X
clockwise to allow excess pressure to
escape.
279
page 138).
Y
Z