Example: engine oil filler cap
X
Turn cap
:
anti-clockwise and remove it.
X
Top up the engine oil.
If the oil level is at or below the MIN mark on
the oil dipstick, top up with 1.0 l of engine oil.
X
Replace cap
:
on the filler neck and turn
clockwise.
Make sure that the cap locks securely into
place.
X
Check the oil level again with the oil dipstick
(
Y
page 278).
For further information on engine oil, see
(
Y
page 324).
Checking and adding other service
products
Checking the coolant level
G
WARNING
Certain components in the engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is a risk of injury when accessing the
engine compartment.
As far as possible, allow the engine to cool
down and only touch the components descri-
bed in the following.
G
WARNING
The cooling system is pressurised, particu-
larly when the engine 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 gloves and eye protection. Open
the cap slowly to release the pressure.
Example
X
Park the vehicle on a level surface.
Only check the coolant level if the vehicle is
on a level surface and the engine has cooled
down.
X
Turn the key to position 2 in the ignition lock
(
Y
page 132).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
Y
page 132).
X
Check the coolant temperature gauge in the
multifunction display.
The coolant temperature must be below
70 †.
X
Turn the key to position 0 (
Y
page 132) in the
ignition lock.
X
Slowly turn cap
;
half a turn anti-clockwise
to allow excess pressure to escape.
X
Turn cap
;
further anti-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
:
.
If the coolant level is approximately 1.5 cm
above marker bar
=
in the filler neck when
warm, there is enough coolant in coolant
expansion tank
:
.
X
If necessary, top up with coolant that has
been tested and approved by Mercedes-Benz.
X
Replace cap
;
and turn it clockwise as far as
it will go.
Further information on coolant (
Y
page 325).
Engine compartment
279
Mainten
ance
and
care
Z
