2012 MERCEDES-BENZ M-Class top up coolant

Furth
erinfor mationonengi neoil
(Y page 388). Che
cking and adding otherserv ice
pr odu cts
Checkin gth ecoolant level On
lyche ckthecoo lant level when theveh icle
is on alevel surface and theeng inehas cooled
down .
X Turn theSm artKey toposit ion
2 (Y page 139)intheign itio nlock .
On veh icleswith KEYLE SS-GO ,pres sth e
St art /S topbutt ontwic e(Ypage 139).
X Check thecoolant temperaturegauge in
the multifun ction display.
The coolant temperaturemustbebelow
158 ‡(70 †). G
WARN
ING In
order toavoid anypoten tiallyserious burns:
R use extreme caution whenopenin gthe
hood ifther eare any signs ofsteam or
coolant leakingfromthecoolin gsystem ,or
if the coolant temperaturedisplay indicates
that thecoolant isoverheat ed.
R do not remov ethe pressure caponthe
coolant reservoirifthe coolant temperature
is above 158‡(70 †). Allow theengine to
cool downbefore removin gthe cap. The
coolant reservoircon tains hotfluid andis
under pressure.
R using arag, slowly turnthecap
approximat ely1
/ 2 turn
torelieve excess
pressure. Ifopened immediately, scalding
hot fluid andsteam willbeblown outunder
pressure.
R do not spill antifreeze onhot engine parts.
An tifr eeze contains ethylene glycolwhich
may burn ifit comes intocontact with hot
engine parts. X
Slowly turncap:half aturn count er-
clock wiseandallow excesspressure to
escape.
X Turn cap:furth ercount er-clockwise and
remove it.
If the coolant isat the level ofmarker bar
= inthe filler neck when cold,there is
enough coolant incoolant expansion
tank ;.
If the coolant isapproximat ely0.6 in
(1.5 cm)above marker bar=inthe filler
neck when warm, thereisenough coolant
in coolant expansion tank;.
X Ifneces sary,addcoolant thathasbeen
test edand approved byMercedes- Benz.
X Replace cap:and turn itclock wiseasfar
as itwill go.
For furth erinfor mation oncoolant ,see
(Y page 389).
Windshield washersystemand
headla mpcleaning system The
washer fluidreservo iris used forboth the
windshield washersystemandtheheadlamp
cleanin gsystem. i
Vehicle
compon entsand their servic e
product smust match.You should,
theref ore,only useproduct sthat have been
test edand approved byMercedes- Benz.
Inf ormation ontest edand approved
product scan beobtained atany authorized
Mercedes- BenzCenter oron the Internet at
htt p://ww w.mbu sa.com (USAonly). Engine
compartment
315Maintenance and care Z

as
ares ult ofagin g,soot andfuel depos its.It
is the refore stron gly recomm endedthat you
carr yout regular oilchan gesusing an
approv edeng ineoilwith theappropr iateSAE
class ification . Refr
igera ntoftheair -cond itioning
syst em
The air-c ondit ioningsyst emisfilled with
R134 aref riger antand aspec ialPAG
lubrican t.
! Neve ruse refriger antR12 (CFC) or
min eral lubrican ts.O the rwise, youcou ld
da ma gethe air-co nditioning syste m. Brake
fluid G
WA
RNI NG Ove
raperiod oftime, thebrake fluidabsorbs
moist urefrom theair;this lowers itsboiling
point .
If the boiling pointofthe brake fluidistoo low,
vapor pocketsmay form inthe brake system
when thebrakes areapplied hard(e.g.when
driving downhill). Thiswould impair braking
effic iency.
You should havethebrake fluidrenewed at
regular intervals. Thebrake fluidchang e
int ervals canbefound inthe Serv iceBook let.
Only usebrake fluidapproved byMercedes -
Ben z.Inf ormat ionabout approved brake
fluids canbeobtained fromanyauthoriz edMercedes
-Benz Center oron the Internet at
htt p:// bevo.m ercedes- benz.com . Coolant
Impor tantsafet ynotes The
coolant isamixt ureofwater and
antif reeze/ corrosion inhibito r.Itperfor ms
the following tasks:
R corr osion protection
R antif reeze protection
R raising theboiling point
The engin ecooling systemisfilled atthe
fact orywith coolant thatcontains an
antif reeze/ corrosion inhibito rthat ensures
protect iondown toapproximately -35‡
(-37 †).
! Only addcoolant thathasbeen premixed
with thedesired antifreez eprotect ion.
Otherwise, theengine couldbedamaged.
Further information oncoolants andon
filling canbefound inthe Mercedes-Ben z
Specifications forService Products, MB
Approval 310.1,e.g. onthe Internet at
http: //bevo.m ercedes-benz .com.You can
also consult anauthorized Mercedes-B enz
Center.
! Always useasuitable coolantmixture,
even incount rieswhere hightemperat ures
prevail.
Otherwise, theengine cooling systemisnot
sufficient lyprotec tedfrom corrosion and
overheating.
If the coolant hasantifr eezeprotec tiondown
to -35 ‡(-37 †),theboiling pointofthe
coolant underoperating conditionsis
approximately 266‡(130 †).
Your vehicle hasarange ofaluminum
compon ents.Aluminum componentsinthe
engine makeitnecessary touse antifr eeze/
corrosion inhibitorcoolantthathasbeen
specifically formulatedtoprotec tthe
alumi numparts. Usingotherantifreez e/ Service
products andcapacities
389Technical data Z

corro
sioninhi bitors withou tthese
characterist icsaffects theservice life.
The coolant mustbeused throughout theyear
in order tomaintain thenecessary corrosion
protect ionand toprovide protectionfrom
overheating. Inthe Service Booklet, youcan
find information onthe intervals forrenewal.
The renewal intervalisdetermined bythe
coolant typeandtheengine cooling system
design. Therenewal intervalinthe Service
Booklet isonly valid ifthe coolant isrenewed
or filled upwith Mercedes-Ben zapproved
product s.Therefo re,only useMB325 .0or
326 .0antic orrosion /antifreez eor anot her
Mercede s-Benz approved productofthe
same specific ation.
Inf ormat iononother product swith thesame
specific ationsthatareapproved by
Mercede s-Benz can beobtaine dat an
authoriz edMercede s-Benz Cente roro nthe
Int ernet athttp: //bevo.m ercedes-benz .com.
The coolant ischeck edatevery maintenanc e
interval atan authorized Mercedes-Ben z
Center.
The antifreez e/corrosion inhibitor
conc entration inthe engine cooling system
should:
R be atleast 50%.Thiswillprotect theengine
cooling systemagainst freezing downto
approximately -35‡(-37 †).
R not exceed 55%(antifreeze protectionto
-49 ‡[-45 †]);othe rwise, heatwillnot
dissipate aseffec tively.
If the coolan tlevel istoo low, MB325 .0or
326 .0ant icorr osion /antifreez eshould be
added. Havetheengin ecoolin gsystem
chec kedforpossible leaks. Wind
shield/h eadlampcleaning
syst em G
WARN
ING Washer
solvent/ant ifreez eis highly
flammable. Donot spill washer solvent/
ant ifreez eon hot engin eparts,bec ause itmay ign
ite and burn .You could beseriously
burned.
Use MBSummerF itwindshield washer
conc entrateattemperatures abovefreezin g:
X Mix 1part MBSummerF itwith 100parts
water.
Use MBWinterF itwindshield washer
conc entrateattemperatures belowfreezin g:
X At temperatures downto14 ‡(Ò10 †):
mix 1part MB WinterF itwit h2p artswate r.
X At temper aturesdown toÒ4 ‡ (Ò20 †):
mix 1part MBWinterF itwit h1 part wate r.
X At temper aturesdown toÒ20 .2‡
(Ò 29 †): mix2part sMB WinterF itwit h1
part wate r.
! OnlySum merFitand WinterF itcan be
mix ed. Other wise, theje ts could become
bloc ked. Veh
icle data Pleas
eno te that for thespec ifiedveh icle
dat a:
R theheig htsspec ifiedmay varyas ares ult
of:
- tires
- load
- co nd ition ofthesuspe nsion
- opt ionalequipm ent All
mod els Veh
icle lengt h 18
9.1in (48 04mm ) Veh
icle widt h
inclu dingext erior
mir rors 84
.3in(21 41mm ) Veh
icle heigh t 70
.7in(17 96mm ) Wh
eelba se 11
4.8in (29 15mm ) Fron
ttr ack 64
.7in(16 42mm ) Rea
rtr ack 65
.2in(16 57mm ) 390
Veh
icle dataTechnical data