2012 MERCEDES-BENZ M-Class change wheel

i
Vehicles
equipped withMOExt endedtires
are not equi pped withaTIREFIT kitatthe
factory. Itis therefore recommended that
you addi tionally equipyou rvehicle witha
TIREF ITkit ifyou mount tiresthatdonot
feature run-flatpropert ies,e.g. winter tires.
A TIREF ITkit can beobtained froman
authoriz edMercedes- BenzCenter .
X Make surethathighway levelis
select ed25
(Y page 180).
X Stop the vehicle onsolid, non-slippery and
level ground, asfar away aspossible from
traff ic.
X Switc hon the hazard warning lamps.
X En gage theelectr icparkin gbrake manually
(Y page 156).
X Brin gthe fron twheels intothestraight-
ahead position.
X Move theDIRECT SELECT lever toP.
X Switch offthe engine.
X Vehicles withoutKEYLESS-GO: remove
the SmartK eyfrom theignition lock.
X Vehicles withKEYLESS-GO: openthe
driver's door.
The on-board electronic shave status 0,
which isthe same asthe SmartK eyhaving
been removed.
X Vehicles withKEYLESS-GO: removethe
Start /Stopbutton fromtheignition lock
(Y page 139).
X All occupants mustgetout ofthe vehicle.
Make surethatthey arenot endangered as
they doso.
X Make surethatnoone isnear thedanger
area while awheel isbeing changed.
Anyone whoisnot directly assisting inthe
wheel change should,forexample, stand
behind thebarrier.
X Get outofthe vehicle. Payattent ionto
traffic condition swhen doing so.
X Close thedriver's door.
X Unload heavyluggage. i
Only
operate thetire inflation compressor
using a12 Vsocket (Ypage 297), evenif
the ignition isturned off.
An emergency cut-offensures thattheon-
board electrical systemvoltage doesnot
drop toolow. Ifthe on-board electrical
system voltage istoo low, power tothe
socket sis automatically cutoff. This
ensures thatthere issufficient powerto
start theengine. TIREFIT
kit
Using theTIREFIT kit You
canusetheTIREFIT kittoseal small
punctures, particularly thoseinthe tire tread.
You canuseTIREFIT atoutside temperatures
down toÒ4 ‡(Ò20 †). G
WARNING TIREFIT
isalimited repairdevice. TIREFIT
cannot beused forcuts orpunctures larger
than approximately 0.16in(4 mm) andtire
damage causedbydriving withextrem elylow
tire inflation pressure, oron aflat tire, ora
damaged wheel.
Do not drive thevehicle undersuch
circumstan ces.
Contact thenearest authorized Mercedes-
Benz Center forassistance orcall Roadsi de
Assistanc e.
X Do not remove anyforeign objectswhich
have penetrated thetire, e.g.screws or
nails.
X Remove thetire seala ntbottle, the
accompanying "max.80km/h" stickerand
the tire inflation compressor fromthe
stowage wellunderneath thecargo
compartmen tfloor (Ypage 328).
25 Vehicles withtheAIRMATIC package. 330
Flat
tireBreakdown assistance

X
To incre ase thetire pres sure :sw itch on
the tire inflation comp ressor . E
Pressu rerelease button
F Pressu regaug e
X To reduc ethe tire pres sure :pre ss
pre ssu rerelease button Eonthe filler
hos e.
X Stow thetire sealant bottle and thetire
infl ation comp ressor .
X Driv eto the nearestworkshop andhave the
tire changed there.
X Have thetire sealant bottlereplaced as
soon aspossible ataquali fiedspecialist
workshop, e.g.atan authorized Mercedes-
Benz Center. H
Environmental
note Have
theused tiresealant bottledisposed of
professionally, e.g.atan authorized
Mercedes-B enzCenter.
X Have thetire sealant bottlereplaced every
four years ataquali fiedspecialist
workshop, e.g.anauthorized Mercedes-
Benz Center. Changing
awhee land mountin gthe
spare wheel
Preparing thevehi cle G
WARNING The
wheeland tiresize ofthe emerge ncy
spa rewhe el/sp arewhe elmay differtothat of
the damaged wheel.Whenusingan
emergenc yspare wheel/spare wheelthe
handling character isticsofthe vehicle may
change.
Adapt yourstyle ofdriving accordingly.
Never operate thevehicle withmore thanone
emergenc yspare wheel/spare wheelthat
differs insize.
Only useanemergenc yspare wheel/spare
wheel ofadiffering sizebriefly anddonot
switch offESP ®
.
When usinganemergenc yspare wheel, you
must notexceed themaximum speedof
50 mph (80km/ h). G
WARNING Have
theemergenc yspare wheel/spare
wheel replaced withanew wheel assoon as
possible ataquali fiedspecialist workshop
which hasthenecessary specialistknowledge
and tools tocarry outthework required.
Mercedes-B enzrecommen dsthat youusean
authorized Mercedes-B enzCenter forthis
purpose. Inparticular, workrelevant tosafety
or on safety-related systemsmustbecarried
out ataquali fiedspecialist workshop. i
Vehicles
withoutaspare wheel/
emergenc yspare wheel arenot equipped
with atire-c hange toolkitatthe factor y.For
more informat iononwhich toolsare
required toperform awheel change onyour
vehicle, e.g.wheel chock,lug wrench or
alignment bolt,consult anauthorized
Mercedes-B enzCenter. Flat
tire
333Breakdown assistance Z

X
Prepare thevehicle asdescribed
(Y page 329).
X Ifatrailer iscoupled tothe vehicle,
uncouple it.
X Remove thefollowing items(depending on
the vehicle's equipment) fromthestowage
well under thetrun kfloor:
R the emer gencyspare wheel26
R the lugwren ch
R the foldin gwheel chock
R the jack
R the ratchet wrench
R the alignm entbolt
X Sec ure thevehic leto prev entitfro mr olling
away .
Securing thevehicle toprevent itfrom
rolling away G
WARNIN
G Only
jackupthe vehicle onlevel ground oron
slight inclines/ declines. Thevehicle could
otherwise falloffthe jack andinjure youor
others.
If your vehicle isequipped withawheel chock,
it can befound inthe vehicle toolkit
(Y page 328).
The folding wheelchock isan additional
securing measure toprevent thevehicle from
rolling away,for example whenchanging a
wheel. X
Fold both plates upwards :.
X Fold outlower plate;.
X Guide thelugs onthe lower platefullyinto
the openings inbase plate =. Securing
thevehicle onlevel ground
X On level ground: placechock sor other
suitable itemsunder thefront andrear of
the wheel thatisdiagonally oppositethe
wheel youwish tochange. Securing
thevehicle onslight downhill gradients
X On downhill gradients: placechock sor
other suitable itemsinfront ofthe wheels
of the front andrear axle.
Raising thevehicle G
WARNIN
G When
jackingupthe vehicle, onlyusethejack
which hasbeen specifically approvedby
Mercedes-B enzforyour vehicle.
The jack isdesigned exclusively forjack ingup
the vehicle atthe jack ingpoints builtintoboth
26 Vehicles withanemergenc yspare wheel. 334
Flat
tireBreakdown assistance

sides
ofthe vehicle. Thejack saddle mustbe
placed centrally under thejacking point.The
jack must alwaysbe vertical wheninuse,
especiall yon inclines ordeclines.
The jack isintended onlyforlifting thevehicle
briefly forwheel changes. Itis not suited for
performing maintenance workunder the
vehicle. Tohelp avoid personal injury,usethe
jack onlytolift the vehicle duringawheel
change.
Never getbeneath thevehicle whileitis
supported bythe jack. Keep hands andfeet
awa yfrom thearea under thelifted vehicle.
Always lowerthevehicle ontosufficient
capacity jackstandsbefore working underthe
vehicle.
Always firmlyengage theparking brakeand
block thewheels withwheel chocks orother
sizable objects beforeraising thevehicle with
the jack. Donot disengage theparking brake
while thevehicle israised.
Make surethattheground onwhich the
vehicle isstanding andwhere youplace the
jack issolid, levelandnotslippery .If
nece ssary,us ealarge underlay.O ns lippery
surfac es,such astiled floors,you should use
a non -slip under lay,forexam plearubber mat.
Do not use wooden blocksor similar objects
as ajac ku nde rlay.Othe rwise, the jack may
not beableto ach ieve its load -be aring
cap acityifit is not atits fullhei ght.
Nev ersta rtthe engi newhen the vehicleis
rai sed .
Als oob ser vethe notes onthe jack. X
Usi nglug wre nch :,loose nthe bolts on
the wheel youwish tochange byabout one
full turn. Donot unscrew thebolts
completely.
The jackin gpoints arelocated justbehind the
wheel housings ofthe front wheels andjust
in front ofthe wheel housings ofthe rear
wheels (arrows). G
WARNING The
jack isdesigned exclusively forjackin gup
the vehicle atthe jackin gpoints. Thejack
saddle mustbeplaced centrally under the
jackin gpoint.
If you donot position thejack correct lyin the
jackin gpoint, thevehicle canfalloffthe jack
and seriously orfatally injureyouorothers.
! The jack isdesigned exclusively for
jackin gup the vehicle atthe jackin gpoints.
Otherwise, yourvehicle couldbedamaged.
X Take theratchet wrench outofthe vehicle
tool kitand place iton the hexagon nutof
the jack sothat theletters AUFarevisible. X
Position jack=atjackin gpoint ;. Flat
tire
335Breakdown assistance Z

G
WARNING Make
suretouse theorigi nallength wheel
bolts when remou ntingtheorigi nalwhee l
after ithas been repaired.
X Cle anthe whee land whee lhub contact
surfa ces.
! Toprevent damagetothe paintwork, hold
the whee lsecure lyaga inst thewhee lhub
whi lescrewi nginthe first whee lbolt. X
Slide theemerge ncysparewhee lonto the
ali gnment boltandpushit on.
X Tigh tenthewhee lbolts untiltheyare
finger-tigh t.
X Unscrew thealignment bolt.
X Tigh tenthelastw heel boltuntil itis finger-
tight.
Low ering thevehicle X
Place theratchet wrench ontothehexagon
nut ofthe jack sothat theletters ABare
visible.
X Turn theratchet wrench untilthevehicle is
once again standing firmlyonthe ground.
X Place thejack toone side. X
Tighten thewheel boltsevenly ina
crosswise patterninthe sequence
indicated (: toA). Thetighten ingtorque
must be110 lb-ft (150 Nm). G
WARNING Have
thetighten ingtorque checked
immediately afterawheel ischanged. The
wheels couldcome looseifthey arenot
tighten edtoatorque of110 lb/ft
(150 Nm).
X Turn thejack back toits initial position and
store ittogether withtherest ofthe tire-
change toolkitinthe cargo compartmen t.
Vehicles withanemergency sparewheel:
X Wrap thedefective wheelinthe protect ive
film included withtheemergency spare
wheel andtransport thewheel inthe cargo
compartmen t.
or
X Depending onthe size ofthe wheel, you
may alsobeable tosecure thedefective
wheel inthe emergency sparewheel well.
In this case, youmust remove thestowage
tray from theemergency sparewheel well
and store itsecurely inthe cargo
compartmen t. i
When
youaredriving withthecollapsibl e
spare wheel mounted, thetire pressure
loss warning systemorthe tire pressure
monitorin gsystem cannotfunction
reliabl y.Only restart thetire pressure loss
warning system/t irepressure monitorin g Flat
tire
337Breakdown assistance Z

system
whenthedefective wheelhasbeen
replaced withanew wheel.
Vehicles withtirepressure controlsystem:
all wheels mounted mustbeequip pedwith
function ingsensors. Thedefective wheel
should nolonger beinthe vehicle. MOExtended
tires(tires withrun-flat
propert ies)
MOExt ended tires(tires withrun-flat
properties) allowyou tocont inue driving your
vehicle evenifone ormore tiresareentirely
deflated.
MOExt ended tiresmayonlybeused in
conj unction withtheactivated tirepressure
loss warning systemorwith theactivated tire
pressure monitoring system.
The maximum permissible distancewhich
can bedriven inrun-flat modedepends onthe
load inthe vehicle. Youcandrive 50miles
(80 km) ifthe vehicle ispartiall yladen and
18 miles (30km) ifit is fully laden.
The maximum permissible distancewhich
can bedriven inrun-flat modeiscounted from
the moment thetire pressure losswarning
appea rsinthe multifunction display.
You must notexceed amaximum speedof
50 mph (80km/h). G
WARNING The
handling characteristics ofyour vehicle
deteriorate inrun-flat mode,forexample:
R when cornering
R when braking
R when accelerating rapidly
Adapt yourdriving styleaccordingly andavoid
sudden changes indirection andsudden
acceleration, aswell asdriving overobstacles
(i.e. curbs, potholes), anddriving off-road.
This isparticularly thecase when thevehicle
is heavily laden.
The maximum permissible distancethatcan
be driven inrun-flat modedepends toalarge
extent onthe loads placed onthe vehicle. It can
beshorter duetohigh speeds, aheavy
load, sudden changes indirection, theroad
surface condition, outsidetemperature, etc.,
or further ifyou drive carefully and
conservatively.
Do not cont inue todrive inrun-flat modeif:
R you hear banging noises.
R the vehicle startstoshake.
R you seesmoke andsmell rubber.
R ESP ®
is intervenin gconst antly.
R there aretears inthe sidewa llsofthe tire.
Aft erdriving inrun-flat mode,youmust have
the wheel( s)checked fordamage ata
qual ified speciali stworkshop whichhasthe
necessary specialistknowledge andtools to
carry outthework required. Thedefective tire
must bereplaced inevery case.
Mercedes-Benz recommendsthatyouusean
authorized Mercedes-Benz Centerforthis
purpose. Inparticular, workrelevant tosafety
or on safety-related systemsmustbecarried
out ataqual ified speciali stworkshop. i
When
replacing oneorall tires, make sure
that youonly usetires marked
MOExt ended andofthe specified sizefor
the vehicle. Bat
tery Importa
ntsafety notes
In order forthe battery toachieve the
maximum possibleservicelife,itmust always
be sufficiently charged.
! Have thebattery checked regularlyata
qual ified speciali stworkshop, suchasan
authorized Mercedes-Benz Center.
Adhere tothe service intervals indicated in
the service booklet orask aqual ified
speciali stworkshop, suchasan authorized
Mercedes-Benz Center.
Have thebattery chargechecked more
frequently ifyou usethevehicle mainlyfor 338
Bat
teryBreakdown assistance

If
the tire pressu reshave been settothe
lowe rvalues forlight erloads and/or lower
road speeds,thepres suressho uld beres et
to thehigh ervalues :
R ifyou want todriv ewit han increas edload
and /or
R ifyou want todriv eat high erroad speeds. i
The
tirepres suresfor increas edloads
and /or high erroad speeds,sho wninthe
tir epres sure table,may have ane gat ive
eff ect ondriv ingcomf ort . i
For
trailer towing ,adj ust thetir epres sure
of therear tires tothemax imum tire
pres sure value state don thet able inside
th efuel fillerflap.
Opt ion 3)The tirepr essur efor the
emer gency/collap siblesparewheel
(depen dingonvehic leequipmen t)can be
foun d:
R prin tedinyellow onthe rim ofthe
emer gency/c ollapsible sparewheel
R in the "Wheel andtirecom binat ions"
sect ion(Ypage 375)in this manual
R on the Tire andLoadin gIn for mat ionplacard
on the B-pillar onthe drive r'sside.
If the tirepress ureisnot setcorrectly, this
can lead toan exc essiv ebuild upofheat and
a sudde nloss ofpressure.
For further information,consult aquali fied
specialist workshop, e.g.anauthorized
Mercedes-B enzCenter. Import
antnotes ontire pressur e G
WARNIN
G Should
thetire pressure droprepeatedly:
R check thetire forforeign bodies.
R check whether thewheel islosing airorthe
valve isleaking.
R make surethatonly avalve capapproved
by Mercedes-B enzisused onthe tire valve.
Tire pressures thataretoo low have a
negative effectonvehicle safety,whichcould
lead youtocause anaccident .
To test tirepressure, useasuitable tire
pressure gauge.Theouter appearance ofa
tire does notpermit anyreliable conclusion
about thetire pressure. Onvehicles equipped
with theelectron ictire pressure monitoring
system, thetire pressure canbecheck ed
using theon-board computer.
The tiretemperat ureand pressure increase
when thevehicle isin motion .This is
dependent onthe driving speedandtheload.
Therefore, youshould onlycorrect tire
pressures whenthetires arecold.
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).
The tiretemperature changesdepending on
the outside temperature, thevehicle speed
and thetire load. Ifthe tire temperature
changes by18 ‡(10 †),the tire pressure
changes byapproximately 10kPa (0.1 bar/
1.5 psi). Take thisinto account when
check ingthe pressure ofwarm tiresandonly
correct thetire pressure ifit is too low forthe
current operating conditions.Ifyou check the
tire pressure whenthetires arewarm, the
resulting valuewillbehigher thanifthe tires
were cold.Thisisnormal. Donot reduce the
tire pressure tothe value specified forcold
tires. Thetirepressure wouldotherwise be
too low. Tire
pressure
355Wheels and tires Z

Check
ingthetir epr essu res
Imp ortant safety notes G
WAR
NING Fol
low recomm ended tireinf lati onpres sures.
Do notunde rinflat etir es. Underi nflate dtir es
wear exces sively and /or unevenly,adve rsely
aff ect handlingand fuel economy, and are
mor elik ely tofail from bein gove rheated.
Do notoverinfla tetires. Overinfla tedtires can
adve rsely affect handlingand ride comfort,
wea runeve nly,incre asestop ping dista nce,
and resulti ns udden deflation (blowo ut)
bec ause they are mor elik ely tobec ome
pun ctured ordamag edbyroad debris,
pot hole set c.
Do noto verloa dthe tires byexceedi ngthe
specifi edloadlimi tasindicated onthe Tire
and Loading Information placardonthe
driver's doorB-pillar. Overloading thetires
can overheat them,possibly causinga
blowou t.Overloading thetires canalso result
in handling orsteering problems, orbrake
failu re.
Check thetire pressure atleast once amonth.
Only check andcorrect tirepressures when
the tires arecold (Ypage 353).
Checki ngtire pressures manually To
determine andsetthe correct tire
pressure, proceedasfollows:
X Remove thevalve capofthe tire that isto
be checked.
X Press thetire pressure gaugesecurely onto
the valve.
X Read thetire pressure andcompare itwith
the recommended valueonthe Tire and
Loading Information placardonthe
B-pillar onthe driver's sideofyour vehicle.
X Ifnecessary, increasethetire pressure to
the recommended value(Ypage 353).
X Ifthe tire pressure istoo high, release air
by pressing downthemetal pininthe valve
using thetipofapen, forexample. Then check
thetire pressure againusing thetire
pressure gauge.
X Screw thevalve caponto thevalve.
X Repea tthese steps forthe other tires. Tire
pressur eloss warning system
(Canada only)
Import antsafety notes While
thevehicle isin motion, thetire
pressure losswarning systemmonitors the
set tire pressure usingtherotational speedof
the wheels. Thisenables thesystem todetect
significant pressurelossinatire. Ifthe speed
of rotation ofawheel changes asaresult of
a loss ofpressure, acorresponding warning
message willappea rint he multifunction
displa y. G
WARNING If
the Check Tire Pressure Soon message
appears inthe multifunction display,one or
more tiresaresignificantly underinflated.
Stop thevehicle assoon aspossible and
inflate thetires tothe pressure specified on
the vehicle's TireandLoading Information
placard or(where available)inthe tire
pressure table.
Driving onasignificantly underinflated tire
causes thetire tooverheat andcanlead to
tire failure. Underinflation alsoreduces fuel
efficiency andtiretread life,and may affect
the vehicle's handlingandstopping ability.
Check alltires when cold,including thespare
tire, atleast once amont h.The tires should
be inflated tothe recommen dedpressure.
This information canbefound:
R on the Tire andLoading Informationplacard
on the B-pillar onthe driver's side
or
R in the table forthe tire pressure onthe
inside ofthe fuel filler flap Tire
pressure
357Wheels and tires Z