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 307).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
Y
page 307).
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 307) in the ignition lock.
X
Slowly turn cap
:
half a turn counter-
clockwise 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 coolant expansion 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 536).
Adding washer fluid to the windshield
washer system/headlamp cleaning
system
G
WARNING
Washer solvent/antifreeze is highly
flammable. Do not spill washer solvent/
antifreeze on hot engine parts, because it may
ignite and burn. You could be seriously
burned.
Example: washer fluid reservoir
Depending on the engine, the washer fluid
reservoir may be installed in different
locations.
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.
The washer fluid reservoir is used for both the
windshield washer system and the headlamp
cleaning system.
Further information on windshield washer
fluid/antifreeze (
Y
page 537).
Brake fluid level
!
If the brake fluid level in the brake fluid
reservoir has fallen to the MIN mark or
below, check the brake system
immediately for leaks. Also check the
thickness of the brake linings. Visit a
qualified specialist workshop immediately.
Do not add brake fluid. This does not
correct the malfunction.
468
Engine compartment
Maintenance
and
care
