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 162).
or
X
Press Start/Stop button twice (
Y
page 162).
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 162)
in the ignition lock.
or
X
Remove Start/Stop button from ignition lock
(
Y
page 162).
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.
Vehicles with PLUG-IN HYBRID operation: the
second coolant expansion tank must not be fil-
led.
For further information on coolant, see
(
Y
page 431).
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 311).
Further information on windshield washer fluid/
antifreeze (
Y
page 431).
ASSYST PLUS
Service message
The ASSYST PLUS service interval display
informs you of the next service due date.
Information on the type of service and service
intervals (see the separate Maintenance Book-
let).
You can obtain further information from an
authorized Mercedes-Benz Center or at
http://www.mbusa.com (USA only).
ASSYST PLUS
357
Maintenance
and
car
e
Z
