Operation Manual

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 127).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
Y page 127).
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 in the ignition
lock (
Y page 127).
X
Slowly turn cap : half a turn counter-clock-
wise to allow excess pressure to escape.
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 334).
Adding washer fluid to the windshield
washer system/headlamp cleaning
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
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 234).
Further information on windshield washer fluid/
antifreeze (
Y page 335).
Maintenance
ASSYST PLUS
Service messages
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).
Maintenance
277
Maintenance and care
Z