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.
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 139).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
Y
page 139).
X
Check the coolant temperature display in the
instrument cluster.
The coolant temperature must be below
70 †.
X
Turn the key to position 0 in the ignition lock
(
Y
page 139).
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 341).
Topping up the windscreen washer sys-
tem
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
If windscreen washer concentrate comes into
contact with hot components of the engine or
the exhaust system, it can ignite. There is a
risk of fire and injury.
Make sure the windscreen washer concen-
trate does not come into contact with the filler
neck.
X
To open: pull cap
:
upwards by the tab.
X
Top up with the premixed washer fluid.
X
To close: press cap
:
onto the filler neck
until it engages.
If the washer fluid level drops below the recom-
mended minimum of 1 litre, a message appears
in the multifunction display prompting you to
top up the washer fluid (
Y
page 252).
Engine compartment
293
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