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 ignition
lock (
Y
page 136).
or
X
Press Start/Stop button twice (
Y
page 136).
X
Check the coolant temperature display in the
instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
X
Turn the SmartKey to position 0 (
Y
page 136)
in the ignition lock.
or
X
Remove Start/Stop button from ignition lock
(
Y
page 136).
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
;
.
If the coolant level is approximately 0.6 in
(1.5 cm) above marker bar
=
in the filler neck
when warm, there is enough coolant in expan-
sion 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 360).
Adding washer fluid to the 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.
G
WARNING
Windshield washer concentrate could ignite if
it comes into contact with hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
X
To open: pull cap
:
upwards by the tab.
X
Place cap
:
on the edge of the filler neck and
engage in place.
X
Add 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 liter, a message appears
in the multifunction display prompting you to
add washer fluid (
Y
page 254).
Further information on windshield washer fluid/
antifreeze (
Y
page 361).
Engine compartment
293
Maintenance
and
car
e
Z
