2012 MERCEDES-BENZ M-Class cooling

Problems
withtherear window
defroster The
rear window defroster hasdeactivated
itself prematurely orcannot beactivated.
X Switch offany consumers thatarenot
required, e.g.reading lampsorinterior
lighting.
When thebattery issufficiently charged,
the rear window defroster isactivated
again automatically. Activating/deactivating
air-
recirculation mode
You candeactivate theflow offresh airif
unpleasant odorsareenterin gthe vehicle
from outside. Theairalready insidethe
vehicle willthen berecirculated.
The operation ofair-recirculation modeisthe
same forallcont rolpanels. G
WARNING Fogged
windows impairvisibility,
endangering youand others. Ifthe windows
begin tofog onthe inside, switching offthe
air recirculation modeimmediately should
clear interior window fogging. Ifinterior
window foggingpersists, makesuretheair
condition ingisactivated, orpress the¬
button.
X Turn theSmartK eytoposition 2in the
ignition lock.
X To activate: pressthed button.
The indicator lampinthe d button lights
up. i
In
the event ofhigh pollu tionlevels 13
or at
high outside temperatures, air-
recirculation modeisautomatically
activated. Whenair-recirculation modeis
activated automatically ,the indicator lamp
in the d button isnot lit.
Outside airisadded afterabout 30
minutes. X
To switch off:press thed button.
The indicator lampinthe d button goes
out. i Air-r
ecirculation modedeactivates
automatically :
R after approximately fiveminutes if
outside temperatures areless than about
41 ‡(5 †)
R after approximately fiveminutes if
cooling withairdehumidi ficationis
deactivated
R after approximately 30minutes ifoutside
temperatures areover about
41 ‡(5 †)
R ifyou press the¿/Á buttonand
switch oncooling withair
dehumidi fication Activating/deactivating
theresidual
heat function
The residual heatfunct ionisonly availa blein
Canada
It is possible tomake useofthe residual heat
of the engine tocont inue heating the
stationary vehicleforupto30 minutes after
the engine hasbeen switched off.The heating
time depends onthe temperature thathas
been set. i
The
blower willrun atalow speed
regardless ofthe airflow setting. i
If
you activate theresidual heatfunct ion
at high temperatures, onlythevent ilation
will beactivated. Theblower runsat
medium speed.
X Turn theSmartK eytoposition 0in the
ignition lockorremove it.
X To activate: presstheÌ/Á button.
The indicator lampinthe Ì/Á
button lightsup.
13 Automatic climatecontrolonly. Operat
ingthe climate controlsystem
133Climate control Z

X
To dea ctivate :pre ssthe Ì/Á
bu tton.
The indicator lamp inthe Ì/Á
bu tton goesou t. i Re
sidu alhea tisdeactivated
automaticall y:
R after about30 minutes
R when theignition isswitched on
R ifthe battery voltage drops
R ifthe coolant temperature istoo low Setting
theairvents Importa
ntsafety notes G
WARNING When
operating theclimate control,the air
that enters thepassenger compartment
through theairvents canbevery hotorvery
cold (depending onthe settemperature). This
could cause burnsorfrostbite tounprotected
skin inthe immediate areaofthe airvents.
Always keepsufficient distancebetween
unprotected partsofthe body andtheair
vents. Ifnecessary, usetheairdistribution
adjustment todirect theairtoair vents inthe
vehicle interior thatarenot inthe immediate
area ofunprotected skin.
In order toensure thedirect flowoffresh air
through theairvents intothevehicle interior,
please observe thefollowi ngnotes:
R keep theairinlet grille onthe hood andin
the engine compartment onthe front -
passenger sidefreeofblockages, suchas
ice, snow orleaves.
R never covertheairvents orair intake grills
in the vehicle interior. i
For
virtually draft-free ventilation, adjust
the sliders ofthe airvents tothe cent er
position. Setting
thecenter airvents :
Center airvent, left
; Center airvent, right
= Center ventthumbwheel, right
? Center ventthumbwheel, left
X To open/c lose:turnthumbwheels =
and ?tothe right orleft. Setting
theside airvents X
To open/c lose:turn thumbwheel =upor
down. Setting
theglove boxairvent
When automatic climatecontrolisactivated,
the glove boxcanbecooled, forinstance to
cool itscont ents. Thelevel ofairflow depends
on the airflow andairdistribution settings.
At high outside temperatures, opentheair
vent andactivate the"cooling withair
dehumid ification" function. 134
Setting
theairventsClimate control

!
Close theairvent ifyou donot wish to
cool theglove boxoryou have notswitched
on cooling withairdehumid ification.
Moisture-sensitive itemsstored inthe
glove boxcould otherwise bedamage d. :
Airvent thumbwheel
; Airvent
X To open: turnthumbwheel :counter-
clockwise.
X To clos e:turn thumbwheel :clockwise. Setting
therear- compart mentair
vents
Setting thecenter ventsinthe rear
compart ment Example:
centerventsinthe rear compartment
with rearcontr olpanel
: Rear-compartment airvent thumbwheel
; Rear-compartment airvent, right
= Rear controlpanel
? Rear-compartment airvent, left X
To open/c lose:turn thumbwheel :upor
down.
Setting therear- compart mentsideair
vents These
rear-compartment sideairvents are
only available ifyour vehicle has3-zone
automatic climatecontrol. :
B-pillar airvent
; Thumbwhe elfor B-pillar airvent
X To open/c lose:turn thumbwheel ;tothe
left orright. Setting
theairvents
135Climate control Z

Engine
Displ
aymes sage s Possib
lecau ses/cons equences andM Solu
tions +
Che
ckCoolant Lev
elSee Ope
rator'sMan ual The
coolant levelis toolow.
X Add coolant ,obse rving thewarn ingnoteswhen doingso
(Y page 315).
X Ifcoo lant needs tobe added moreoft en than usual, havethe
en gin ecoo lant systemcheck edataqualifie dspec ialist
work shop. G
WAR
NING Do
notspill antif reeze onhot engin eparts. Antifr eeze contains ethylene glycolwhich mayburn
if it comes intocon tact with hotengin eparts. Youcould beseriously burned.
! The coolant levelistoo low. Avoid makin glong journ eyswith toolittlecoolant inthe cooling
system. Theengin ewill other wisebedamaged.
The display messages andthecorr espondin gsymbol thatindicat ethat thecoolant levelis
too low must notbeignored. 254
Display
messagesOn-board computer and displays

Cap
acities
Miss ingvalues werenota vail ablea ttime ofgoin gto prin t. Model Capa
city Fuel,
coolant ,
lubr icant s,etc. Engine
oiland
filt er 4MA
TIC 8.
5US qt(8.0l) Appr
oved engine
oils 7.
4US qt(7.0l) Cooling
system All
models MB
325 .0or
MB 326 .0
ant icor rosio n/
ant ifre eze Ta
nk capa city All
models Gasoline
engines :
prem ium-g rade
unleaded gasoline
(at least 91octane,
average value
betwe en96 RON/
86 MON)
Dies eleng ines :
ULTRA -LOW
SUL FUR HIGH WAY
DI ES EL FUE L(ULS D,
maxim umsulfur
con tent15 ppm) Reser
ve All
models DEF
tank 4MA
TIC 7.
3US gal (27.5l) DE
Fin acc ordan ce
with ISO22241 Wind
shield /
head lamp
cleaning
syst em All
models MB
winds hield
washer
con centrate 33
(Y page 390)
Mixin grat iofor
washer fluid
(Y page 390) 33
Mixe dwith water orprem ixedwasher fluidwithantifre eze prot ection. 384
Serv
iceprodu ctsand capacit iesTechnical data

ML 350 BlueTEC
ML 350 4MATIC
ML 350 BlueTEC

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

All
mod els Gr
ound clearance 8.
0in (20 2mm ) Tu
rning circle 38
.7ft(11 .80m) Ma
xim um roof
load Max
imum 220lb
(10 0kg ) Tr
ailer towhitch Mou
nting dim ension s G
WAR
NING On
lyhave atrailer tow hit ch retrofitted ata
qualif iedspec ialist workshopwhic hhas the
ne ces sary specialist knowled geand tools to
car ryout thework required .Mercedes- Benz
recom mends thatyouuseanauthorized
Mercedes- BenzCenter forthis purpose. In
particular, workrelevant tosafety oron
safety-r elatedsystems mustbecarried outat
a qualified specialist workshop.
! Ifyou have atrailer towhitchretr ofitt ed,
changes tothe cooling systemanddrive
train maybeneces sary,depending onthe
vehicle type.
If you have atrailer towhitchretr ofitt ed,
observe theanchor agepoint son the
chassis frame. An
chorage pointsforthe trailer towhitch
(example)
: Anchorage points
; Rear axlecenterline Tr
ailer loads
Missing valueswerenotavailable attime of
going toprint . All
models Perm
issible trailer load,
unbra ked Perm
issible trailer load,
brak ed34 Maxim
umdrawbar
noseweig ht35 Perm
issible rearaxle
load when towing atrail er 34
At ami nim um gradient-c limbi ngcap ability of12% fromastandstill.
35 The drawba rnoseweight isnot included inthe trailer load. Tr
ailer towhitch
391Technical data Z