2012 MERCEDES-BENZ M-Class warning light

If
you wish tocancel theres tart:
X Pre ssthe% button.
or
X Ifth e Tir
ePre ssureNow OK? mes
sage
appear s,pre ss9 or: tosele ct Can
cel .
X Pre ssthea button.
The tirepre ssur evalues store dat thelast
res tartw illcon tinue tobe mon itored. Tir
epr essur emonit or
Imp ortant safety notes If
atir epress uremon itorsyst emisinst alled,
the vehic le'swheels havesensors that
mon itorthetirepress uresinall four tires. The
tir epress uremon itorwarns youifthe
press uredrops inone ormor eof the tires. The
tir epress uremon itoronly functionsif the
cor rectwheel electronic sunits areinstalled
on allwheels.
The tirepressure monitorhasayell ow
warning lampinthe instrumen tcluster for
indicating pressureloss/malfunction s(USA)
or pressure loss(Canada ).Whether the
warning lampflashes orlights upindicates
whether atire pressure istoo low orthe tire
pressure monitorin gsystem is
malfunctionin g:
R ifthe warning lampislit cont inuously ,the
tire pressure onone ormore tiresis
significantly toolow. Thetirepressure
monitor isnot malfunctionin g.
R USA only: ifthe warning lampflashes for
60 seconds andthen remains litconst antly,
the tire pressure monitorismalfunctionin g. G
WARNING Each
tire,including thespare (ifprovided),
should becheck edatleast once amont h
when coldandinflated tothe pressure
recommen dedbythe vehicle manufacturer
on the Tire andLoading Informationplacard
on the driver's doorB-pillar orthe tire
pressure labelonthe inside ofthe fuel filler flap.
Ifyour vehicle hastires ofadifferent size
than thesize indicated onthe Tire andLoading
Inform ationplacard orthe tire pressure label,
you should determine theproper tirepressure
for those tires.
As anadded safetyfeature, yourvehicle has
been equipp edwith atire pressure monitorin g
system (TPMS)thatilluminates alow tire
pressure telltalewhenoneormore ofyour
tires aresignificantly underinflated.
Acc ordingly, whenthelow tirepressure
telltale illuminates, youshould stopandcheck
your tires assoon aspossible, andinflate
them tothe proper pressure. Drivingona
significantly underinflated tirecauses thetire
to overheat andcanlead totire failure.
Underinflation alsoreduces fuelefficiency
and tiretread life,and may affect thevehicle's
handling andstopping ability.
Please notethattheTPMS isnot asubstitute
for proper tiremaintenanc e,and itis the
driver's responsibility tomaintain correcttire
pressure, evenifunderinflation hasnot
reached thelevel totrigger illumination ofthe
TPMS lowtirepressure telltale.
USA only:
Your vehicle hasalso been equipp edwith a
TPMS malfunction indicatortoindicate when
the system isnot operating properly.The
TPMS malfunction indicatoriscombined with
the low tirepressure telltale.Whenthe
system detects amalfunction, thetelltale will
flash forapproximately oneminute andthen
remain continuously illuminated. This
sequence willberepeated everytimethe
vehicle isstarted aslong asthe malfunction
exists.
When themalfunction indicatorisillu minated,
the system maynotbeable todetect orsignal
low tirepressure asintended. TPMS
malfunctions mayoccur foravariety of
reasons, including theinstallation of
incompatible replacementoralternate tires
or wheels onthe vehicle thatprevent the
TPMS fromfunctioning properly. Always
check theTPMS malfunction telltaleafter Tire
pressure
359Wheels and tires
Z

mounted
isnot thesame asthe spare
whee l/emerg encyspare wheel'scurrent
tire pressu re.
Tire pressure monitorwarning
message s If
the tire pressu remonitor detectsa
signifi cantpressu reloss onone ormore tires,
a warni ngmessa geisshow nint he
multifunction display.Aw arning tone also
soun dsand thetir epres sure warninglamp
light sup intheins trumen tcluster .
Eac htir ethat isaffec tedbyasign ificant loss
of press ureishighligh tedwith acolor .
If the Corr
ect Tire Pressure mess
age
appears inthe mult ifunc tiondisplay:
X Check thetirepress ureonallfour wheels
and correctit ifnec essary. i
If
the wheel positionsonthe vehic leare
int erc hang ed,the tirepress uresmaybe
displayed forthe wron gposit ionsfora
shor ttime. Thisisrec tified afterafew
min utes ofdrivin g,and thetirepress ures
are displayed forthe correctpositions.
Restar tingthetire pressur emonitor G
WARNIN
G It
is the driver's responsibility toset the tire
pressure tothe recommen dedcold tire
pressure. Underinflatedtiresaffect theability
to steer orbrake thevehicle. Youmight lose
cont rolover thevehicle.
When yourestart thetire pressure monitor,
all existin gwarning messages aredeleted and
the warning lampsgoout. Themonit oruses
the current lyset tire pressures asthe
referen cevalues formonit oring. Inmost
cases, thetire pressure monitoringsystem
recogn izesthenew referen cevalues
automatically. However,
youcan also define referen ce
values manually asdescribed here:
X Set thetire pressure (Ypage 353)tothe
value recomm endedforthe correspon ding
driving situation onthe Tire andLoading
Infor mation placard onthe driver's side
B-pillar.
Additional tirepressure valuesfordriving
at high speeds orwith heavy loadscanbe
found inthe tire pressure tableonthe
inside ofthe fuel filler flap.
X Make surethatthetire pressure iscorrec t
on allfour wheels.
X Make surethattheSmart Keyisin position
2 in the ignition lock.
X Press the= or; button onthe
steerin gwheel toselect the Serv. menu.
X Press the9 or: button toselect Tire
Pressure .
X Press thea button .
The multifunct iondisplay showsthe
current tirepressure ofthe individual tires
or the Tire
pressure willbe displayed
afterdriving afew minutes message.
X Press the: button .
The Use
Current Pressures asNew Reference
Values message
appearsin
the multifunct iondisplay .
If you wish toconfirm theresta rt:
X Press thea button .
The Tire
Press. Monitor Restarted message
appearsinthe multifunct ion
display .
Aft erdriving forafew minutes, thesystem
check swhether thecurrent tirepressures
are within thespecified range.Thenew tire
pressures arethen accepted asreferen ce
values andmonit ored.
If you wish tocancel theresta rt:
X Press the% button .
The tirepressure valuesstored atthe last
restart willcont inue tobe monit ored. Tir
epr essure
361Wheels and tires Z

Tire
size des ignati on,load -bea ring
cap acit yand speed ratin g :
Tire width
; Nom inalaspec tratio in%
= Tire code
? Rim diame ter
A Load bearingindex
B Spe edrating i
Tire
datais veh icle-spec ificand may
devi atefrom thedat ain theex ample .
Gener al:depen dingon theman ufacturer's
st and ards ,th esiz eimpr inted inthetir ewall
may notco ntain any letters or may contain
on elet tert hat precedes thesize description.
If there isno letter preceding thesize
description (asshown above): theseare
passenger vehicletiresaccording to
European manufacturing standards.
If "P" precedes thesize description: theseare
passenger vehicletiresaccording toU.S.
manufacturing standards.
If "LT" precedes thesize description: these
are light truck tiresaccording toU.S.
manufacturing standards.
If "T" precedes thesize description: theseare
compact emergency sparewheels athigh tire
pressure, tobe used onlytemporarily inan
emergency.
Tire width: tirewidth :shows thenominal
tire width inmillimeters.
Nominal aspectratio: aspect ratio;isthe
size ratio between thetire height andthetire
width andisshown inpercent .The aspect ratio
iscalculated bydividing thetire width by
the tire height.
Tire code: tirecode =specifies thetire type.
"R" represents radialtires."D"represents
diagonal tires,"B"represents diagonalradial
tires.
Optionally, tireswithamaximum speedof
over 149mph(240 km/h)mayhave "ZR"in
the size description dependingonthe
manufacturer (e.g.245/ 40ZR18).
Rim diamet er:rim diameter ?isthe
diameter ofthe bead seat,notthediameter
of the rim flange. Therimdiameter is
specified ininches (in).
Load bearing index:loadbearing indexA
is anumerical codewhich specifies the
maximum load-bearing capacityofatire. G
WARNING The
tireload rating mustalwaysbe atleast
half ofthe GAWR ofyour vehicle. Otherwise,
sudden tirefailure maybethe result which
could cause anaccident and/orserious injury
to you orothers.
Always replace rimsandtires withrims and
tires having thesame specifications
(designation, manufacturer andtype) as
shown onthe original part. G
WARNING Do
not overload thetires byexceeding the
specified loadlimit asindicated onthe Tire
and Loading Informationplacard onthe
driver's doorB-pillar. Overloading thetires
can overheat them,possibly causinga
blowou t.Overloading thetires canalso result
in handling orsteering problems, orbrake
failure.
Example:
The load bearing index91isequiva lenttoa
maximum loadof1356 lbs(615 kg)that the
tire can carry. Forfurther information onthe
maximum tireload inkilograms andpounds,
see (Ypage 365). 368
Tire
labeli ngWheels and tires

Fuel
Imp ortant safety notes G
WAR
NING Gasoli
neand dies elfuel sare high lyflam mabl e
and poisonous. They burnviolen tly and can
caus eser ious injury.
Nev erallow sparks,flam esorsmo king
mat erialsne ar gaso lineor dies elfuel !
Turn offtheen gin ebef ore refuelin g.
When everyou are around gasoline ordiesel
fuel, avoid inhaling fumesandanyskin or
clothin gcont act.Extinguish allsmokin g
materials.
Direct skincontactwith fuels andthe
inhalation offuel vapors aredamaging your
health.
Premium -gradeunleaded gasoline !
Toensure thelongevity andfull
performanc eof the engine, onlypremium-
grade unleaded gasolinemaybeused.
If there isno premium-grade unleaded
gasoline availableand regular-grade
unleaded gasolinemaybeused; please
observe thefollowing precautions:
R only fillthe fuel tank tohalf fullwith
regular-grade unleadedgasolineandfill
the rest with premium-grade unleaded
gasoline assoon aspossible.
R do not drive atthe maximum speed.
R avoid sudden acceleration.
R ifthe vehicle iscarrying alight load, e.g.
two passengers withoutluggage, donot
allow theengine torev above
3,000 rpm.
R ifthe vehicle isfully loaded orisbeing
operated inmountainous terrain,donot
depress theaccelerator pedalfurther
than Ôofthe pedal travel. Flexibl
efuel vehicles Import
antsafety notes
Flexible fuelvehicles canberecogn izedby
the stick eron the inside ofthe filler flap.
Flexible fuelvehicles canbeoperated with
premium-grade unleadedgasolineand
ethanol (E85)oramixt ureofboth. Ethanol
fuel (E85) isam ixture ofapprox imately85%
eth anol and15% unleaded gasoline. G
WARN
ING Et
hanol fuel(E85)and itsvapor sare highly
flamm able,poison ousand highly
com bustib le.Ethanol fuelcauses serious
inj ury ifit ignit es,ifit com esintocon tactwith
your skinorifyou inhale thevapors .Avoid
inhal ingethanol vaporsand ethanol coming
into contact withyourskin. Before refueling,
extingui shallnaked flames.Never allow
sparks orsmoking materialsnear ethanol .
Chang ingthe fuel type
For best performa nceand driva bility, itis
recommended thatyouuseeither oneorthe
other fuel.Avoid alterna tingregu larly
betwe enthe two differe nttypes offuel .
When changing betweenthe fuel types ,
ensure thatthefollowi ngconditions aremet:
R the fuel levelis bel ow halffull.
R thefuel levelis abov eth eres erveleve l.This
is iden tifiabl eby thefuel tankreserve
warning lampnotbeing lit.
R you add more than5gallon s(20 liters )of
fuel.
R you switchoff theen gin eb efore refueling.
R the engin eis start edand runs foratleast
five minut esimmediately afterrefueling.
These precaution sshould preventthe
possibili tyof engine difficulties arisingfrom
changing toadifferent fueltype.
If the engine stilldoesn't runcorrect ly,refuel
with atleast 3USgal(12 l)of prem ium-grad e
unle aded gasoline.This may improve the
running ofthe engine. Service
products andcapacities
385Technical data Z

or
go tothe Internet site
htt p:// www.mbusa.com (USAonly).
Diese lengines –fuels containi ngbio -
dies el(FAME [fatty acidmethyl ester])
Merced es-Benz USAapproves theuse ofB5
for alldie sel engines withcommon raildire ct
injection (CDI)andBlue TEC. The
concentration ofbio -dies elin ULSD maybea
maximu mof up to5% byvolu me.
Pure bio-dies eland diesel fuel sthat have a
high erconcentration ofbio -dies el,e.g. B20,
can dama gethe fuel system andtheengine.
They aretherefore notapproved.
For further informa tion,please askthegas
station personnel.Thelabel onthe gas pump
must indicate clearlythat theB5bio-dies el
ble nd fulfillsthe ULSD standa rd.Ifthe label
is not clea r,do not refue lthe vehi cle.
Do not refue lyou rvehicle withfuels unless
they have been approved byMercedes- Benz.
Addit ivesingasoline One
ofthe main problems ofpoor fuelquality
is the formin gof deposits thatarecreat ed
during thegasoline combustionprocess .
Mercedes- Benzrecom mends thatyouuse
fuel brands thathave theadditives.
Deposit smay form ifyou usefuels without
additives overalonger period oftime. These
deposits aremost likely toform onthe inlet
valves andinthe combust ionchamber.
This could leadtoengin eproblems, e.g.:
R longer enginewarm-up phase
R uneven idle
R engin enoise
R misfirin g
R loss ofpower
Carbon deposits mayform ifthe availabili ty
of gasoline withrelevant additives is
insuffic ient(incert ainregions). Inthis case,
Mercedes- Benzrecom mends theuse of
additives thathave been approved for
Mercedes- Benzvehicles. Consult
anauthoriz edMercedes- BenzCent er
or go tothe Internet site
htt p:// www.mbusa.com (USAonly)foralist
of approved products.Comply withthe
inst ruct ions foruse onthe product label.
Do not mix other fueladditives withfuel. This
causes unnecessary costsand could damage
the engin e.
! Donot refuel withlow-grade fuelanddo
not use fuel additives thatarenot tested
and approved forMercedes- Benzvehicles.
Damage toor malfunct ionsofthe fuel
system mayother wiseoccur. DEF
Impor tantsafet ynotes i
For
BlueTEC vehiclesonly.
DE Fisa non- flammable ,non- toxic, colorless,
odorless andwater-solubl efluid.
! Rinse surfaces thathave come into
cont actwith DEFimmediately withwater or
remove DEFusing adamp clothandcold
water. Ifthe DEF hasalrea dycrystallized,
use asponge andcold water toclean it.DEF
residues crystallize aftertimeand
cont aminate theaffected surfaces.
High outside temperatures If
DEF heats uptoover 122‡(50 †)for
extended periods,e.g.asaresult ofdirect
sunlight onthe DEF reservoir, DEFcan
decompose. Ammoniavapors develop asa
result. G
WARNING When
opening thefiller capofthe DEF tank
ammonia gasvapors mayescape. RefillDEF
in awell ventilated areaonly. Ammonia gas
vapors haveapungent odorandare
particularly irritatingforyour skin, mucous
membranes, andeyes. Inhaling ammonia gas
vapors willcause burning eyes,nose, and
throat, aswell ascoughing andwatering eyes. Service
productsand capacities
387Technical data Z