coolant reservoir MERCEDES-BENZ GL SUV 2012 Owners Manual

X
Slowl yturn cap :half aturn anti-clock-
wise to allo wexces spress uretoe scape.
X Turn cap :further anti-clockwise and
rem ovei t.
If the coolant is at the level of marker bar
= in the fille rneck when cold, ther eis
enough coolan tincoolant expansion
tank ;.
If the coolant leve lisapproximately
1.5 cm above marker bar =in the filler
nec kwhen warm, ther eisenoughcoolant
in coolant expansion tank ;.
X If necessary ,top up with coolant that has
been tested and approved by Mercedes-
Ben z.
X Replace cap :and turn it clockwise as far
as it will go.
For further information on coolant, see
(Y page 429).
Topping up the windscreen washer sys-
tem/headlam pcleaning system G
WAR
NING
Windscreen washer fluid/antifreeze is highly
flammable .Avoid spilling windscreen washer
fluid/antifreez eonh ot engin ecomponent sas
it can ignit eand burn. Severe burns could be
the resul t. Example: washer fluid reservoir
Example: washer fluid reservoir in AMG vehicles
X
To open: pull cap:upward sbythe tab.
X Top up with the premi xedw asher fluid.
X To close: press cap :ontothe filler neck
until it engages.
The washer fluid reservoi risu sed for both the
windscree nwasher system and th eheadlamp
cleaning system.
Further inf ormatio nonw indscreen washer
fluid/antifr eeze (Ypage 43 0). Service
ASSYST PLUS
Service messages The ASSYS
TPLUS service interva ldisplay
inform syou of the nex tservice due date.
In fo rmation on th etype of service and service
intervals (se eseparate Ser vice Boo klet).
You can obtain further information from a
Mercedes-Ben zService Cent re.364
ServiceMaintenance and care

!
Alway suseasuitabl ecoolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the engin ecooling system is not
sufficiently protected from corrosion and
overheating.
! The engin ecooling system is filled with
coolant, which must be renewed after
15 years or after 250,000 kilometres at the
latest.
The coolant is amixtur eofw ater and anti-
freeze/corrosio ninhibitor. It performs the
following tasks:
R anti-corrosio nprotection
R antifreeze protection
R raising th eboiling point
If antifreeze/ corrosion inhibitor is presen tin
the correct concentration, the boil ingp oint of
the coolant during operation will be approx-
imately 13 0†.
The antifreeze/ corrosion inhibitor concentra-
tion in the engin ecooling system should:
R be at least 50%. This will protect the engine
coolin gsystem against freezing down to
approximatel y-37 †.
R not exceed 55% (antifreeze protection
down to -45 †). Hea twill otherwise not be
dissipated as effectively.
If the vehicle has lost coolant, top it up with
equa lamounts of water and antifreeze/cor-
rosio ninhibitor. Mercedes-Benz recom-
mends an antifreeze/corrosion inhibito rcon-
cen trate in accordance with MB Specifica-
tions for Service Products 310.1.
The coolant is checked at every maintenance
interval at aqualified special istworkshop.
i When the vehicle is first delivered ,itisfil-
led with acoolant mixtur ethat ensures
adequate antifreeze and corrosion protec-
tion. Windscreen washe
rsystem an dhead-
lamp cleaning system
Important safety notes G
WARNING
Windscreen washer concentrat eishighly
flammable. If it comes into contact with hot
engine component sorthe exhaust system it
coul dignite. There is arisk of fire and injury.
Make sure that no windscreen washer con-
centrate is spille dnext to the filler neck.
! Only use washer fluid that is suitable for
plastic lamp lenses, e.g. MB SummerFit or
MB WinterFit. Unsuitable washer fluid
could damage the plastic lenses of the
headlamps.
! Do not use distilled or de-ionised water in
the washer fluid reservoir. Otherwise, the
level sensor may be damaged.
! Only the washer fluids SummerFit and
WinterFit can be mixed. Otherwise, the
spraying nozzles could become blocked.
At temperatures above freezing:
X Fill the washer fluid reservoir with amixture
of water and washer fluid, e.g. MB Sum-
merFit.
Mix 1part MB SummerFit to 100 parts water.
At temperatures below freezing:
X Fill the washe rfluid reservoir with amixture
of water and washer fluid, e.g. MB Winter-
Fit.
Adapt the mixin gratio to the outside temper-
ature.
R Down to Ò10 †: mix 1part MB WinterFit to
2p arts water.
R Down to Ò20 †: mix 1part MB WinterFit to
1p art water.
R Down to Ò29 †: mix 2parts MB WinterFit
to 1p art water.
i Add washe rfluid concentrate, e.g. MB
SummerFit or MB WinterFit, to the washer
fluid all year round. 430
Service products and capacitiesTechnical data