2012 MERCEDES-BENZ M-Class low oil pressure

1,
2,3... 115
Vsocket .................. .................... 298
12 Vsocket
see Sockets
4ETS (Electr onicTract ion Syst em)....63
4MA TIC(permane ntfour-w heel
drive) .................................................. 208A
ABS
(Anti-lo ckBraking System)
Displ aymessa ge............................ 239
Function/notes ................................61
Importa ntsafe tynotes .................... 61
Warni nglamp ....... .......................... 272
Ac tivating /deactivating cooli ng
wi th air dehumidif ication ................. 128
Ac tive BlindSpot Assist
Activa ting/d eactiva ting(on-
boa rdcomp uter)............................ 232
Function/inform ation.................... 202
Trai lertowi ng................................. 205
Ac tive Curve System
Displ aymessa ge............................ 258
Function/notes ............................. 181
Ac tive DrivingAssistanc epackage .202
Ac tive Lane Keepin gAss ist
Activating/d eactivating (on-
boa rdcompu ter)............................ 233
Displ aymessa ge............................ 259
Function/inform ation.................... 205
Trai lertowi ng................................. 208
Ac tive LightSyste m
Displ aymessa ge............................ 253
Ac tive Parking Assist
Displ aymessa ge............................ 260
Importa ntsafe tynotes .................. 186
Tow ingatrail er.............................. 189
Ac tive servi cesyste mPLUS
see ASSYS TPLUS service interval
disp lay
AD APTIVE BRAKE.................... .............6 5
Ada ptive High beam Assist
Dis play message ............................ 253
Function/notes ............................. 112
Switchi ngon/off (on-boa rd
compu ter)...................................... 234Additi
ves(engi neoil)........................ 388
AD S(A daptive DampingSyste m)
Function/notes ............................. 180
Ai rb ags
Displ aymessa ge............................ 249
Front airbag (driver, front
pas senger )....................................... 42
Importa ntsafe tynotes .................... 40
Knee bag....... ................................... 42
PASSENGER AIRBAG OFF
indi cator lamp .................................. 44
Safety guidel ines ............................. 39
Side impactairb ag .......................... 43
Windo wcurtain airbag .................... 44
Ai r-con ditioningsyste m
see Clima tecontrol
Ai rf ilter (disp laymessa ge).............. 257
AI RF LOW ........................................... 129
AI RMATIC package
ADS (Adaptive Dampi ngSystem) ...180
Function/notes ............................. 180
Level control .................................. 181
Ai rpressure
see Tire press ure
Ai rv ents
Glove box....................................... 134
Imp ortant safet ynotes .................. 134
Rea r............................................... 135
Setting ........................................... 134
Setting thecenter airvents ........... 134
Setting thesideairvents ............... 134
Al arm syste m
see ATA (Anti-Theft Alarmsystem)
Ambi entlighting
Setting thebrightness (on-boa rd
compu ter)...................................... 234
Setting thecolor (on-boa rd
compu ter)...................................... 235
Anti -lockBraki ngSys tem
se eABS (Anti-lock Bra king Syste m)
An ti-Th eftAl arm system
se eATA (Anti -Theft Alarm syste m)
An ti-th eftsys tem
ATA (Anti -Theft Alarm syste m) ......... 68
Approac h/departure angle.............. 166
Ashtray ............................................... 2964
In
dex

Problems
withthetransmission Problem Possible
causes/co nsequences andM Solutions
The
transm issionhas
problems shiftinggear. The
transm issionislosing oil.
X Have thetransm issioncheckedataqual ified specialist
workshop, e.g.anauthorized Mercedes-B enzCenter,
immediately. The
acceleration ability
is deteriorating.
The transm issionno
longer changes gear. The
transm issionisin emergency mode.
It is only possible toshift intosecon dgear andreverse gear.
X Stop thevehicle.
X Shift thetransm issiontoposition P.
X Switch offthe engine.
X Wait atleast 10seconds beforerestartingthe engine.
X Shift thetransm issiontoposition Dor R.
If D is selected, thetransm issionshiftsintosecon dgear; ifR is
selected, thetransm issionshiftsintoreverse gear.
X Have thetransm issioncheckedataqual ified specialist
workshop, e.g.anauthorized Mercedes-B enzCenter,
immediately. Refueling
Import
antsafety notes G
WARNING Gasoli
neand diesel fuelsarehighly flammable
and poisonous. Theyburnviolently andcan
cause serious injury.
Never allowsparks, flamesorsmoking
materials neargasoline ordiesel fuel!
Turn offthe engine beforerefueling.
Whenever youarearound gasoline ordiesel
fuel, avoid inhaling fumesandanyskin or
clothing contact.Extinguish allsmoking
materials.
Direct skincontactwith fuels andthe
inhalation offuel vapors aredamaging your
health. G
WARNING Overfilling
ofthe fuel tank maycreate
pressure inthe system whichcouldcause a
gas discharge. Thiscould cause thegasoline to
spray backoutwhen removing thefuel
pump nozzle,which couldcause personal
injury. G
WARNING Do
not filldiesel tankswith gasoline. Donot
mix diesel fuelwith gasoline. Otherwise the
fuel system andengine couldbedamaged. In
addition, thevehicle couldcatch fire.
! Donot use gasoline torefuel vehicles with
a diesel engine. Donot use diesel torefuel
vehicles withagasoline engine.Evena
small quantity ofthe wrong fuelwill
damage thefuel system andengine.
! Donot switch onthe ignition ifyou
accidentally refuelwiththewrong fuel.
Otherwise, thefuel willenter thefuel lines.
Notify aqual ified specialist workshop and
have thefuel tank andfuel lines drained
completely. Refueling
149Driving and parking Z

Check
listbefor edr iving off-road X
Engine oillevel: check theen gin eoil and
add oilifne ces sary.
When drivingonsteep grad ients,th eoil
leve lmust besuff iciently high toensure a
co rrect oilsupply inthev ehicle.
X DEF tank (BlueTEC vehicles): checkthe
fluid level and,ifnec essary, refilltothe
maximum (13l)(Y page 152).
X Wheel-changing toolkit:chec kthat the
jack isworkin gand make sureyouhave the
lug wrenc h,arobust towcable andafolding
spade inthe vehicle.
X Wheels andtires: chec kthe tire tread
depth andtirepressure.
X Check fordamage andremove anyforeign
objec ts,e.g. small stones,from the
wheels/tir es.
X Replace anymissing valvecaps.
X Replace dentedordamaged wheels.
X Rims: dentedorbent rimscanresult ina
loss oftire pressure anddamage thetire
bead. Therefor e,chec kyour rims before
driving off-road andreplace themas
required.
! Ifthe engine oilwarning lamplights up
while thevehicle isin motion ,stop the
vehicle inasafe place assoon aspossible.
Check theengine oillevel. Theengine oil
warning lampwarning mustnotbeignored.
Continuing thejourney whilethesymbol is
display edcould leadtoengine damage.
Checklist afterdriving off-road G
WARNIN
G If
you notic esudden significant vibrationsor
unusual handling performanc eor ifyou
suspect thatdamage hasoccurred tothe
vehicle, youshould activate thehazard
warning lamps,gentlyreduce speedand
carefully headforanarea thatislocated ata
safe distance fromtheroad.
Check thetires andtheunderside ofthe
vehicle fordamage. Ifthe vehicle seems unsafe,
havethevehicle towedawaytothe
nearest Mercedes-B enzCenter ortire dealer
to be repaired.
! Ifyou detect damage tothe vehicle after
driving off-road, havethevehicle checked
immediately ataquali fiedspecialist
workshop.
Drivin gover rough terrain placesgreater
demands onyour vehicle thandriving on
normal roads.Afterdriving off-road, check
the vehicle. Thisallows youtodetect damage
promptly andreduce therisk ofan accident
to yourself andother roadusers.
X Deact ivateDSR(Ypage 208).
X Vehicles withtheAIRMATIC package:
lower thevehicle toaride height suitable
for the road condit ions,e.g.tothe
highway /high-speed level.
X Clean theheadlamps andrear lights and
check fordamage.
X Clean thefront andrear license plates.
X Clean thewheels/tires withawater jetand
remove anyforeign objects.
X Clean thewheels, wheelarches andthe
vehicle underside withawater jet;check
for any foreign objectsand damage.
X Check whether twigsorother partsof
plants havebecome trapped. These
increase therisk offire and candamage
fuel pipes, brakehoses orthe rubber
bellows ofthe axle jointsand propeller
shafts.
X Aft erthe trip, examine withoutfailthe
entire undercarriage, wheels,tires,brakes,
bodywork structure,steerin g,chassis and
exhaust systemfordamage.
X Aft erdriving forexten dedperiods across
sand, mud,gravel, waterorinsimilarly dirty
condit ions,havethebrake discs, wheels,
brake pads/linings andaxle jointscheck ed
and cleaned.
X Ifyou detect strongvibrations afteroff-road
travel, checkforforeign objectsin the
wheels anddrive trainandremove themif 164
Driving
tipsDriving and parking

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

Dir
ect ion ofrotation
Tir es wit haspe cifie ddir ection ofrotation
hav eaddit ionalben efits, e.g. ifth ere isaris k
of hydr oplaning .Y ou will only gain these
benefits ifthe correc tdirection ofrotat ionis
maintained.
An arrow onthe sidewal lof the tire indicates
its correc tdirection ofrotat ion.
You may mount aspare wheel/emergenc y
spare wheel against thedirection ofrotat ion.
Observe thetime restriction onuse aswell as
the speed limitspecified onthe spare wheel/
emergenc yspare wheel. Storing
wheels
Stor ewheels thatarenot being usedinacool,
dry and preferably darkplace. Protectthe
tires from oil,grease, gasoline anddiesel. Cleanin
gthe wheel s G
WARNING Do
not use power washers withcircular-jet
nozz les(dirt grinders) toclean yourvehicle, in
particular thetires. Youcould otherwise
damage thetires andcause anaccident. Wheel
andtirecombinations Please
bearthefollow inginmind
! For safety reasons, Mercedes-Ben z
recommen dsthat youonly useTires and
wheels whichhavebeen approved by
Mercedes-Ben zspecific allyforyour
vehicle. These
tireshave been specially adaptedfor
use with thecontrolsystems ,such asABS
or ESP®
,and aremark edasfollows:
R MO =Mercedes- BenzOriginal
R MOE =Mercedes- BenzOrigi nal Extended
(tires featuringrun-flat characteristics)
R MO1 =Mercedes- BenzOriginal (only
certain AMGtires)
Mercede s-BenzOriginalExtended tires
may onlybeuse don whee lsthat have been
speci ficallyapp roved byMercede s-Benz.
Only usetires, wheelsor accesso ries
tested andapproved byMercede s-Benz.
Certa inchara cteristics, e.g.handl ing,
vehicl enoise emissionsorfuel
consumptio n,may otherwi sebe adve rsely
affected. Inadd ition, when drivingwith a
loa d,tire dime nsion variations couldcaus e
the tires tocome intocontact withthe
body work andaxle components. Thiscould
resu ltin dama getothe tires orthe vehicl e.
Mercede s-Benzaccepts noliabil ity for
dama geresu lting from theuse oftires,
whee lsor accesso riesother thanthose
tested andapproved.
Further informati onabo uttires, wheelsand
app roved combina tionscanbeobtai ned
from anyauthorized Mercede s-Benz
Center. i
The
Tire andLoad Information placard
with therecommende dtire pressu resis
attached tothe B-pill aron the drive r'sside .
Further informati onabo utdrivi ngathigh
spee dsordrivi ngwith vehicl eloa dsthat are
lig hter than themaximu mvehicle loadcan
be found inthe tire pressure tableonthe
inside ofthe fuel filler flap.Check tire
pressures regularly,andonly when thetires
are cold. Comply withthemaint enanc e
recom mendat ionsofthe tire manufact urer
in the vehicle documen twallet .
For further inform ationon ther ecomm ended
tire inflation pressure andontire pressures
for specific drivingconditions (Ypage 353). Wheel
andtirecombinations
375Wheels and tires Z

Fuel
consu mption
Et han ol(E85 )co ntains lessenerg yper gallon
th an gaso line. To ensure that theen gin e
per forman cewithet han ol(E85 )is sim ilar to
th at when usinggaso line, thee ngine mu st
bu rn mor eetha nol.Asar esult, itis to be
expect edthat fuelconsumption willincrease
when usingethanolfuel (E85 ),compared to
gasoline.
Maint enance
Inf orm your authoriz edMercedes- Benz
Center thatyouareoperatin gor have
operated thevehicle withethan ol(E85 ).
Low outsid etemp eratures
St artin gtimes maysignific antlyincrease at
temper aturesbelow32‡(0 † ).At low
outside temperatures, Mercedes- Benz
recom mends theuse ofan auxiliary heater.
For furth erinfor mation ,con sult anauthoriz ed
Mercedes- BenzCent er.
Rough idlingmayalsobeexperien cedatlow
outside temperaturesuntiltheengin eis fully
warmed up.
Et hanol (E85)is unsuitable foruse ifoutside
temper aturesfallbelow 14‡(-10 †).
High outside temperatures
At outsi detempera turesabove95 ‡(35 †) ,
the timereq uired forthe starting pro ced ure
ma yincr ease and beacc omp anied byrou gh
id ling followi ng the start.
Fu elrequ iremen ts Gas
olin een gine s
Use onlypre mium -gra deunleade dga soline.
Th eocta nenum bers hould beatleast 91.
Details canbefound onthe gas pump. The
octane number isthe average valueofthe
Research OctaneNumber (RON)andthe
Motor Octane Number (MON):(RON+
MON) /2, also known asknoc kresistance. Reformulated
gasoline(RFG)and/or
unleaded gasolinewithadditives canbeused.
However, theconc entration ofadditives in
the fuel must beless than 10%, e.g.
R Ethan ol
R TAME
R ETBE
R IPA
R TBA
For MTBE, theconc entration should not
exceed 15%.
The conc entration ofmethanol ingasoline
including otheradditives mustnotexceed 3%.
Using mixtures ofmethanol andethanol isnot
permitted. Gasohol,amixture of10% ethanol
and 90% unleaded gasoline,canbeused.
All ofthese mixfuels must fulfillthefuel
requirements, e.g.:
R knoc kresistance
R boiling point
R vapor pressure
Diese lengine s–i mporta ntsaf ety notes
! Onlyus ecomm ercially av ailabl e ULT RA-
LOW SULF URDIESEL FUEL(ULSD, 15ppm
MAX IMUMSULF UR)tha tmee tsthe
ASTM D975standa rd.Failure to use
ULT RA-L OWSULF URDIESEL FUEL(ULSD)
can sever elyda ma gethe vehicle'sexh aust
ga saf tertr eatment syste m.
! Donot fill the tank with gasol ine .Do not
bl end dies elfuel with gasol ine orkero sene.
Othe rwise, the fuel syste ma ndthe engine
cou ldbe dama ged.
To pre vent malfunctio ns,diese lfu el with
imp rove dflo wcha racteri stics isavailabl e in
the winter month s.Ch eck with your gas
sta tion.
Info rma tiono nthe fuel grade canusua llybe
found onthe gas pump. Ifthe information
cannot befound onthe gas pump, askthegas
station personnel. Forfurther information ,
consult anauthorized Mercedes-Ben zCent er 386
Service
products andcapa citiesTechnical data