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Example: engine oil cap
X
Turn cap : counter-clockwise and remove it.
X
Add engine oil.
If the oil level is at or below the MIN mark on
the oil dipstick, add 1.1 US qt (1.0 liter) of
engine oil.
X
Replace cap : on the filler neck and turn
clockwise.
Ensure that the cap locks into place securely.
X
Check the oil level again with the oil dipstick
(Y page 261).
Further information on engine oil (Y page 322).
Checking and adding other service
products
Checking coolant level
G
WARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear protective gloves and protective
eyewear when opening. Open the cap slowly
to release pressure.
!
The coolant level must only be checked and
corrected when the engine has cooled down
(coolant temperature under 104 ‡ (40 †).
Checking the coolant level when the coolant
temperature is over 104 ‡(40 †) can lead to
damage to the engine or the engine cooling
system.
X
Park the vehicle on a level surface.
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
X
Turn the SmartKey to position 2 in the igni-
tion lock (Y page 123).
X
Check the coolant temperature display in the
instrument cluster.
The coolant temperature must be below
104 ‡ (40 †).
X
Turn the SmartKey to position g
(Y page 123) in the ignition lock .
X
Slowly turn cap : counter-clockwise and to
relieve excess pressure.
X
Turn cap : further counter-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the filler neck when cold, there is enough
coolant in coolant expansion tank ;.
X
If necessary, add coolant that has been tested
and approved by Mercedes-Benz.
X
Replace cap : and turn it clockwise as far as
it will go.
For further information on coolant, see
(Y page 323).
Windshield washer system
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
263
Maintenance and care
Z
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