R
using a cloth, slowly turn the cap
approximately Ö turn to relieve excess
pressure. If
you open the cap immediately,
pressurized scalding hot fluid and vapor will
be blown out.
R do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. Example
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 135).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
Y page 135).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
X Slowly turn cap ;
half a turn counter-
clockwise and 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 fillerneck 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 563).
Windshield washer system and
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
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.
For further information on the windshield
washer system and headlamp cleaning
system, see ( Y page 564). Engine compartment
499
Maintenance and care Z
