&WARNING Risk of accident caused by
re peated drop in tir epressure
If th et irep ressur edrops repeatedl y,the
wheel, valveort irem aybe damaged.
Insuf ficient tir epressur ecan cause thet ires
to bur st.
#Inspect thet iref or signs of fore ign
objects.
#Chec kwhether thew heel or valveh as a
leak.
#If yo ua reunab leto rectify thed amage,
conta ctaq ualified specialis tworks hop.
Yo uc an find informatio nontirep ressur efor the
ve hicle's factor y-ins talled tires on thef ollowing
labels:
RTi re and Loading Info rmatio nplacar dont he
B‑pi llarofyour vehicle (→pag e319).
RTire pressur etable on thei nside of thef uel
fi ller flap (→pag e314).
Obse rvet he maximum tir epressure
(
→pag e325). Use
asuitable pressur egaug etoc heckthe tire
pressure. The outer appearance of atired oes
no tp ermit an yreliable conclusion about thet ire
pressure.
Ve hicles with atirep ressur emonitoring sys‐
te m: Youc an also checkt he tir epressur eusing
th eo n-boar dcomputer.
Onl ycorrect tir epressur ewhent he tires are
cold. Conditions forc old tires:
RThe vehicle has been par kedw itht he tires
out of direct sunlight foratl east thre eh ours.
RThe vehicle has tr aveled less than 1m ile
(1.6 km).
Ar ise in thet iret emperatur eof18°F( 10°C)
increases thet irep ressur ebya pprox.10k Pa
(0. 1b ar/1.5 psi). Take this int oaccount when
ch ecking thet irep ressur eofw armt ires.
The tire pressure re commendedfori ncreased
load/speedint he tirepressur etable can af fect
th er ide comfort.
&
WARNING Risk of accident from unsuita‐
blea ccessori es onthet irev alves
If yo um ountunsuitable accessories onto tire
va lves, thet irev alves ma ybeoverloaded and
malfunction, whic hcan cause tir epressure
loss. Tire pressur emonitoring sy stems for
re trofitting will cause thet irev alvetor emain
open .This can als oresult in tir epressure
loss.
#Onl yscrew standar dvalvec aps or valve
cap sspecifically appr ovedby
Mercedes-Benzf oryour vehicle onto
th et irev alve.
Tire pressur etable
The tir epressur etable is on thei nside of the
fuel filler flap.
% The dat ashown in thei mages is example
data.
31 4
Wheels and tires
thes ystem is no toperating properly .The
TPMS malfunction indicator is combined with
th el ow tirep ressur eindicator lamp. When
th es ystem de tects am alfunction, thei ndica‐
to rlamp wil lflash fora pproxima tely am inute
and then remain continuously illumina ted.
This sequence will continue upon subsequent
ve hicle start-ups as longast he malfunction
ex ists.
When them alfunction indicator is illumina‐
te d, thes ystemm aynotbea bletodetect or
signal lo wtirep ressur easi ntended. TPMS
malfunctions ma yoccurf orav ariety of rea‐
sons, includingt he installation of incompati‐
ble replacemen toralternat etires or wheels
on thev ehicle that pr event theT PMS from
functioning proper ly.
Alw aysc hec kthe TPMS malfunction warning
lam pafter replacing one or mor etires or
wheels on your vehicle toensur ethat the
re placemen toralternat etires and wheels
allo wthe TPMS tocontinu etofunction prop‐
er ly.Using atirep ressur esensor ,the sy stem checks
th et irep ressur eoft he tires ins talled on the
ve hicle.
Ne wt irep ressur esensors, e.g. in winter tires,
ar ea utomaticall ytaught-in thef irst tim ethe
ve hicle is driven.
The tir epressur eappears inthem ultifunction
displa y(
→page197).
If th er eisas ubstantia lpressure loss or if the
tir et emperatur eisexcessive, awarning will be
given:
RVi ad ispla ymessages (→page382).
RViat he h warning lam pinthe instrument
clus ter(→pag e410).
It is thed rive r's responsibility tosetthe tire
pressur etotherecommended cold tir epressure
suitable fort he operating situation. Se tthe tire
pressur efor cold tires using atirep ressure
ga uge. Notethat thec orrect tir epressur efor the
cur rent operating situatio nmustfirst be taught-
in to thet irep ressur emonitoring sy stem.
In mos tcases, thet irep ressur emonitoring sys‐
te mw illautom atically updat ethe ne wreference va
lues af tery ou ha vechanged thet irep ressure.
Yo uc an,h ow ever,a lso updat ethe refere nce val‐
ues byrestartin gthe tir epressur emonitoring
sy stem manuall y(
→page318).
Sy stem borders
The tir epressur emonitoring sy stem does not
issue awarning:
RIfth et irep ressur eiss etincor rectly.
RIfth er eisas udden pressur eloss caused, for
ex ample, byaforeign object penetratin gthe
tire.
RIf th er eisam alfunction caused byano ther
ra dio signal source.
Be sur etoalso observ ethe following fur ther
re lated subjects:
RNo tesont irep ressur e(→page312)
Checking thet irep ressur ewitht he tir epres‐
sur em onitoring sy stem
Requ irements
RThe ignition is switched on.
Wheels and tires 317
Aftery ou ha vedriven foraf ewminutes, the
sy stem checks whe ther thec urrent tir epres‐
sure sarewithin thes pecified range. The cur‐
re nt tir epressures ar ethen accep tedasr ef‐
erence values and monitored.
Be sur etoalso observ ethe following fur ther
re lated subjects:
RNo tesont irep ressur e(→page312)
Ra dio-type appr oval of thet irep ressure
moni toring sy stem
Ra dio equipment appr oval number
Countr yRadio equipment appr oval
number
Canada
USA FCC ID: MRX
AG5SP4
FCC ID: MRXMFR
IC: 2546A -AG5SP4
Loading thev ehicle
Tire and Loading Information placard
&
WARNING Risk of accident from overloa‐
ded tires
Overloaded tires ma yoverheat and bur stas a
consequence. Overloaded tires can also
impair thes teering and handling characteris‐
tic sa nd lead tobrak efailure.
#Obser vethel oad rating of thet ires.
#The load rating must be at leasthalf the
permissible axle load of thev ehicle.
#Nevero verload thet ires by exc eeding
th em aximum load.
The Tire and Loading Info rmatio nplacar diso n
th eB -pillar on thed rive r's side of thev ehicle.
1Tire and Loading Info rmatio nplacard
Wheels and tires 31
9
and one-half times aswell on theg ove rnment
course as atireg rade d1 00.
The relativ eperform anc eoft ires depends upon
th ea ctual conditions of their use, ho wever,and
ma ydepar tsignificantl yfromt he nor mdueto
va riations in drivin ghabits, servic epractice sand
dif fere nces in road characteristic sand climate
conditions.
Tr actio ngrade
&
DANG ER Risk of accidentd uetoinade‐
qu atet raction
The traction grade assigned tothis tir eis
based on stra ight-ahead brakin gtraction
te sts, and does no tinclude either accelera‐
tion, cornering, hydroplaning or peak traction
ch aracteristics.
#Alw aysa dap tyour driving stylea nd
driv eatas peedtosuit thep reva iling
traf fica nd weather conditions.
* NO
TEDama getothed rive trai nfrom
wheelspin
#Av oid wheelspin.
The traction grades –fromh ighes ttolowest –
ar eA A, A, Band C. Those grades represent the
tire' sabili tyto stop on wetpave ment as meas‐
ured under controlle dconditions on specified
go vernment test sur faces mad eofasphalt and
concr ete.
Te mp eratur egrade
&
WARNING Risk of accident from tire
ove rheating and tir efailure
The temp eratur egrade fort his tir eisestab‐
lishedf oratiret hat is properly inflated and
no to verloaded. Excessiv espeed, underinfla‐
tion, or excessiv eloading, either separately
or in combination, can cause excessiv eheat
build-up and possible tir efailure.
#Obser vether ecommende dtirep res‐
sure sand regularly checkt he tir epres‐
sur eofa ll tires including thes pare
wheel.
#Ad jus tthe tir epressur easn ecessar y.
Thetemp eratur egrades ar eA(theh ighest), B
and C. The yrepresent thet ire's resis tance tothe
ge neration of hea tand its ability todissipate
heat when tested under controlled conditions on
as pecified indoor laborator ytestw heel. Sus‐
ta ined high temp eratures can cause them aterial
of thet iretod egenerat eand reduce tir elife. Fur‐
th ermore, excessiv etemperatures can lead to
sudden tir efailure. Grade Ccorresponds toa
le ve lofp erform anc ewhicha ll passenger car
tires mus tmeetu nde rthe requ irements of the
US Department of Transpor tation.
DO T,Tire Identification Numbe r(TIN)
US tir eregulations stipulat ethat everytirem an‐
ufactu rerorr etre ader must imprint aTIN in or
on thes ide wall of eac htirep roduced.
324
Wheels and tires
Nevere xceed maximum tir epressure 1speci‐
fi ed fort he tire.
Information on tir echaracteristics
%
The dat ashown in thei mag eise xamp le
data.
This information descri besthet ype of tir ecord
and then umber of la yers in side wall1 and
under tir etread 2.
Tire size designation, load-bearing capacity,
speed ratin ga nd load index
&
WARNING Risk of accident duet o
exc eeding thes tatedt irel oad rating or
th ea ppr ove dspeed rating
Exceeding thes pecified tir eload rating or
th ep ermissible speed rating ma ylea dtot ire
damage andtothet ires bur sting.
#Therefore, onl yuse tir etypes and sizes
appr ovedfor your vehicle model.
#Obser vethet irel oad rating and speed
ra ting requ ired fory our vehicle.
1Preceding letter
2Nominal tir ewidthinm illimeters
3Aspect ratio in %
4Tire code
5Rimd iame ter
6Load-bearing index
7Speed rating
8Loa dind ex
% The dat ashown in thei mag eise xamp le
data.
Info rmatio nabout readingt he tiredatac an be
obtained from an yqualified specialis tworks hop.
326
Wheels and tires
Changingawheel
Note sons electing, mounting and replacing
tires
Yo uc an ask fori nformation rega rding permitte d
wheel-tir ecombinations at an authorized
Mercedes-Ben zcenter.
&
WARNING Risk of accident duetoi ncor‐
re ct dimensions of wheelsa nd tires
If wheelsa nd tires of thew rong size are
ins talled, thew heel brakes or wheel suspen‐
sion components ma ybedamaged.
#Alwaysr eplace wheels and tires with
th ose that fulfill thes pecification sof
th eo riginal part.
When replacing wheels, mak esuretof itth e
cor rect:
RDesignation
RModel
Whe nreplacing tires, mak esuretoi nstallth e
cor rect:
RDesignation
RManufactu rer
RModel
&
WARNING Risk of accident duet o
exc eeding thes tatedt irel oad rating or
th ea ppr ove dspeed rating
Exceeding thes pecified tir eload rating or
th ep ermissible speed rating ma ylea dtot ire
damage andtothet ires bur sting.
#Therefore, onl yuse tir etypes and sizes
appr ovedfor your vehicle model.
#Obser vethet irel oad rating and speed
ra ting requ ired fory our vehicle.
* NO
TEDama getovehicle and tires due to
non-app rove dt iret ypes and sizes
Fors afet yr easons, onl yuse wheels, tires
and accessories whic hhave been appr oved
fo ry our vehicle byMercedes-Benz.
These tires ha vebeen speciall yadap tedf or
use wit hthe control sy stems, e.g. ABS or
ESP
®,a nd ar emarke dasf ollows:
RMO = Mercedes-BenzO riginal
RMOE = Mercedes-BenzO riginal Extended
(run-flat tires onl yfor cer tain wheels)
RMO1 = Mercedes-Benz Original (onl ycer‐
ta in AMG tires)
Cer tain characteristics, e.g .handling, vehicle
noise emissions or fuel consum ption, may
ot herwise be adversely af fected. In addition,
whe ndriving wi thaload, tir edimension var‐
iations could caus ethe tires tocome into
contact wi th thebody and axle components.
This could result in damag etothe tires or the
ve hicle.
Wheels and tires 331
RAttemp eratures belo w45°F(7°C), use win‐
te rt ires or all-seaso ntires mar kedM +Sfor
all wheels.
Wi nter tires bearing thei snowflak esym‐
bol in addition totheM +S marking pr ovide
th eb estp ossible grip in wintr yroad condi‐
tions.
RFo rM +S tires, only use tires wit hthe same
tread.
RObser vethem aximum permissible speed for
th eM +S tir emounted.
If th is is belo wthe vehicle's maximum speed,
th is mus tbeindicated in an appropriat elabel
in thed rive r's field of vision.
RBreak-in ne wtires at moderat espeeds for
th ef irst 60 mile s(10 0k m).
RReplace thet ires af ters ixyearsatt he latest,
re ga rdless of wear.
RWhen replacing with tires that do no tfea‐
tu re run-flat characteristics: vehicles with
MOExtended tires ar enotequipped wit ha
TIREFIT kit at thef actor y.Equi pthe vehicle
wit haT IREFIT kit af terr eplacing wit htires th
at do no tfeatur erun- flat characteristics,
e.g .winter tires.
Fo rm orei nformation on wheels and tires, con‐
ta ct aq ualified specialis tworks hop.
Be sur etoalso observ ethe following fur ther
re lated subjects:
RNo tesont irep ressur e(→page312)
RTire and Loading Info rmatio nplacard
(→pag e319)
RTire pressur etable (→pag e314)
Note sonr otating wheels
&
WARNING Risk of injury thro ugh dif fer‐
ent whee lsizes
Inter changing thef ront and rear wheels if the
wheels or tires ha vediffere nt dimensions
ma yseverel yimp air thed riving characteris‐
tics.
The wheel brakes or wheel suspension com‐
ponent smayalso be damaged.
#Rotate front and rear wheels only ifth e
wheels and tires ar eofthe same dimen‐
sions.
The wear patte rnsont he front and rear wheels
dif fer:
RFr ont wheels wear mor eonthe shoulder of
th et ire
RRear wheels wear mor einthe center of the
tire
On vehicles that ha vethes ame size front and
re ar wheels,r otatet he wheels according tothe
inter vals in thet irem anufacturer's warranty
book in your vehicle documents. If this is not
av ailable, rotate thet ires every
3000 to6000 mile s(5000to1 0000 km),
depending on thew ear.Ensuret hat thed irection
of rotatio nism aintained.
It is impe rativ etoo bservethei nstruction sand
saf etyn otes on "Wheel change" when doings o.
Wheels and tires333
Position of jac ksuppor tpoints
&
WARNING Risk of injury from incorrect
positioning of thej ack
If yo udon otpositio nthe jac kcorrectly at
th ea ppropriat ejacking point of thev ehicle,
th ej ackc ould tip wit hthe vehicle raised.
#Onl yposition thej ackatt he appropri‐
at ej acking point of thev ehicle. The
base of thej ackm ustbep ositioned ver‐
tically under thej acking point of the
ve hicle.
* NO
TEVehicle damag efromt he jack
Ifyo udon otpositio nthe jac kcorrectl ya t
th ea ppropriat ejacks uppor tpoint of the
ve hicle, thej ackc ould tip overwitht he vehi‐
cle raised.
#The jac kisdesigned exclusively for
jacking up thev ehicle at thej acks up‐
por tpoints.
#Take ther atche tbox wrenc houtofthev ehi‐
cle tool kit and place it on theh exagon nut of
th ej acksot hatthel ette rs "AUF" (up) are
visible.
#Po sition jack 2at jac ksuppor tpoint 1.
#Turn ratche tbox wrench 3clockwise until
jack 2sitsc omple tely on ja cksuppor tpoint
1 and theb ase of thej ackl ies evenlyo n
th eg round.
#Continue totur nratche tbox wrench 3until
th et ireisr aised amaximum of 1.2i n(3c m)
of ft he ground.
#Loosen and remo vethew heel (→pag e337).
336
Wheels and tires