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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 274).
Further information on engine oil
(Y page 336).
Checking and adding other service
products
Checking coolant level
G
WARNING
The cooling system is pressurized, particu-
larly 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 protec-
tive 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 vehi-
cle 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 125).
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 125) 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 tes-
ted 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 337).
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.
276
Engine compartment
Maintenance and care
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