2012 MERCEDES-BENZ M-Class light

have
been especiall ydeveloped fordriving
on snow.
An electronic speedlimiter prevents your
vehicle fromexceeding aspeed of
130 mph (210 km/h).
The speed ratingoftires mounted atthe
factory maybehigher thanthemaximum
speed thattheelectronic speedlimiter
permits.
Make surethatyour tires have therequired
speed ratingasspecified inthe "Tires"
section (Ypage 375), e.g.ifyou buy new
tires.
Further information aboutreading tiredata
can beobtained fromanyqual ified specialist
workshop, e.g.anauthorized Mercedes-Ben z
Center. Load
index i
Tire
data isvehicle-specific andmay
deviate fromthedata inthe example.
In addition tothe load bearing index,load
index :may beimprinted aftertheletters
that identify speedratingB(Ypage 368)on
the sidewa llof the tire.
R Ifno specification isgiven: notext (asinthe
example above),represents astand ard
lo ad (SL )tir e
R XL orExtra Load:rep resents arei nfor ced
tir e R
Ligh tload: represent sa light loadtire
R C, D, E:represent sa load range that
depends onthe maximum loadthatthetire
can carry atacert ainpressure DOT,
TireIdentification Number(TIN)
U.S. tireregulations prescribethatevery
manufacturer ofnew tires orretreader hasto
imprint aTIN inor on the sidewal lof each tire
produced. The
TINisaunique identificat ionnumber. The
TIN enables thetire manufacturer sto inform
purchasers ofrecalls andother safety-
relevant matters.Itmakes itpossible forthe
purchaser toeasily identify theaffect edtires.
The TINismade upofmanufacturer
identificat ioncode ;,tire size =,tire type
code ?and manufacturin gdate A. i
Tire
data isvehicle-specif icand may
deviate fromthedata inthe example.
DOT (Departm entofTransport ation):tire
symbol :indicates thatthetire complies
with therequirements ofthe U.S. Departm ent
of Transport ation.
Manufa ctureridentification code:
manufacturer identificationcode ;provides
details onthe tire manufacturer .New tires
have acode withtwosymbols. Retreaded
tires have acode withfoursymbols.
Further informationabout retreaded tires
(Y page 350).
Tire size: identifier =describes thetire size. 370
Tir
elabelingWheels and tires

Maximum
loadrating
The maximu mload rating inkilograms or
pounds isthe maximum weightforwhich a
tire isapproved. Maximu
mperm issible tirepressur e
Maximum permissible tirepressure forone
tire. Maximu
mload onone tire
Maximum loadonone tire. This iscalculated
by dividing themaximum axleload ofone axle
by two. PSI
(pounds persquar einch)
As tand arduni tofm easure fortire pressure. Aspect
ratio
Relationship betweentireheight andtire
width inpercen t. Tir
epr essure
This ispressure insidethetire applying an
outward forceto each square inchofthe tire's
surface. Thetirepressure isspecified in
pounds persquare inch(psi), inkilopascal
(kPa) orinbar. Thetirepressure shouldonly
be corr ectedwhen thetires arecold. Tir
epr essure ofcold tires
The tires arecold:
R ifthe vehicle hasbeen parked without
direct sunlight onthe tires foratleast three
hours and
R ifthe vehicle hasnotbeen driven morethan
1 mile (1.6km). Tr
ead
The part ofthe tire that comes intocon tact
with theroad. Bead
The tirebead ensures thatthetire sits
securely onthe wheel. Thereareseveral steel
wires inthe bead topreven tthe tire from
comin gloose fromthewheel rim. Sidewall
The part ofthe tire between thetread andthe
bead. Weight
ofoptional extras
The combin edweight ofthose option alext ras
that weigh morethanthereplaced standard
part andmore than2.3kilograms (5lbs).
These optionalext ras, such ashigh-
perform ancebrakes, levelcontrol, aroof rack
or ahigh-perf ormancebatter y,are not
included inthe curb weight andaccesso ry
weight. TIN
(Tire Identificat ionNum ber)
This isaunique identifierwhich canbeused
by atire manufact urertoident ifytires, for
example foraproduct recall,andthus ident ify
the purchasers. TheTINismade upofthe
manufact urer'sidentitycode, tiresize, tire
type code andthemanufact uringdate. Load
bearing index
The load bearing index(alsoloadindex) isa
code thatcontains themaximum loadbearing
capacity ofatire. Definition
ofter ms fortires and loading
373Wheels and tires Z

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