MERCEDES-BENZ METRIS 2021 MY21 Operator's Manual

Ti
re pressur emonitoring sy stem Fu
nction of thet irep ressur emonitoring sys‐
tem
The sy stem checks thet irep ressur eand thet ire
te mp eratur eofthe tires ins talled on thev ehicle
by means of atirep ressure sensor.
Ne wt irep ressur esensors, e.g. in winter tires,
ar ea utomatically taught-in during thef irst jour‐
ne yt heya reused.
It is thed rive r's responsibility tosetthe tir epres‐
sur etot herecommended cold tir epressur esuit‐
able fort he operating situation (/ page206).
No tethat thec orrect tir epressur efor thec urrent
ope rating situatio nmustfirst be taught-in tothe
tir ep ressur emonitoring sy stem. If asubs tantial
loss of pressur eoccu rs,t he warning thre shold for
th ew arning messag eisaligned tothet aught-in
re fere nce values. Restar tt he tir epressur emoni‐
to ra fter adju sting tothec old tir epressure
(/ page209). The cur rent pressures ar esaved
as ne wreference values. This will ensur ethat a
wa rning messag ewill onl yappear if thet irep res‐
sur edrops significant ly.
The 0077 warning lam pinthe instrument clus ter
displa ysad etected pressur elossoram alfunc‐
tion as follo ws:
R Ifthe 0077 warning lam pislit continuousl y,
th et irep ressur eono ne or mor etires is sig‐
nificantly tool ow .The tir epressur emonitor is
no tm alfunctioning.
R Ifthe 0077 warning lam pflashes fora round a
minut eand then remains lit cons tantl y,the
tir ep ressur emonitorism alfunctioning.
R Am essa gealso appear sinthe instrument
clus ter.
Sy stem limits
The sy stem ma ybeimpaired or ma ynotfunction
in thef ollowing situations:
R The tir epressur ehas been se tincor rectly.
R Thereisas udden pressur eloss caused, for
ex ample, byaforeign object penetratin gthe
tire.
R Ther eisam alfunction caused byano ther
ra dio signal source.
If th et irep ressur emonitor is malfunctioning, it
ma ytakem oret han tenm inutesf or the 0077 tire
pressur ewarning lam ptoinformyou of them al‐
function. When them alfunction has been recti‐ fi
ed, the 0077 warning lam pgoes out af tery ou
ha ve driven foraf ewminutes.
The tir epressur evalue indicated bytheo n-board
computer ma ydiffe rf romt hose measured at a
ga ss tatio nu singap ressur egauge.
The tir epressures shown bytheo n-boar dcom‐
puter refertot hose measured at sea le vel.At
high altitudes, thet irep ressur evalue indicated
by ap ressur egaug earehigher than those shown
by theo n-boar dcomputer .Inthis case, do not
re duce thet irep ressure.
Checking thet irep ressur eelectronically
(onl yvehicles wit hsteering wheel but tons)
Requ irements:
R The ignition is switched on. #
Press the0059 or0065 button toselect
Service. #
Press the0076 button. #
Press the0064 or0063 button toselect Tire
Pressure. #
Press the0076 button.
The displa yshows thec urrent tir epressur eof
ea ch wheel.
If th ev ehicle wasp arke df or longer than
20 minutes, theTire pressure will be displayed
after driving afew minutes messageappear sin
th ed ispla y.
Mak esuretoo bservethef ollowing fur ther rela‐
te ds ubject:
R Notesont irep ressur e(/pag e206)
Rest arting thet irep ressur emonitor
Requ irements:
R The ignition is switched on.
R The recommended tir epressu reis cor rectly
se tfor ther espectiv eoperating condition on
eac hoft hefour wheel s(/pag e207). Wheels and tires
209

Ve
hicles with steering-wheel but tons #
Use the0059 or00D0 button toselect
Service. #
Use the0064 or0063 button toselect Tire
Pressure. #
Press the0076 button toconfirm.
The displa yshows thec urrent tir epressures
of ea chwheel or theTire pressure will be dis-
played after driving afew minutes message. #
Press the0064 button.
The Use Current Pressures as New Refer-
ence Values: messageisshown in thed ispla y. #
Toconfir mrestar t:press the0076 button.
The Tire Press. Monitor Restarted messageis
shown in thed ispla y.
Af tery ou ha vedriven foraf ewminutes, the
sy stem checks whe ther thec urrent tir epres‐
su resa rewithin thes pecified range. The new
tir ep ressures ar ethen accep tedasr eference
va lues and monitored. #
Tocancel restar t:press the0038 button.
The tir epressur evalues stored at thel ast
re star tw ill continue tobe monitored.
Ve hicles without steering-wheel but tons
The vehicle mus tbeatastandstill .Use theb ut‐
to ns on thei nstrument clus ter. #
Press the00DC button toselect theTire Pres-
sure menu. #
Press the0078button toconfirm.
The Monitoring Active messageisshown in
th ed ispla y. #
Press the0078button toconfirm.
The TireP ressur eOK?messag eisshown in
th ed ispla y. #
Toconfir mrestar t:press the0074button.
The displa yshows theD ista nce menu.
Af tery ou ha vedriven foraf ewminutes, the
sy stem checks whe ther thec urrent tir epres‐
su resa rewithin thes pecified range. The new
tir ep ressures ar ethen accep tedasr eference
va lues and monitored. #
Tocancel restar t:press the0075button.
The displa yshows the Tire Pressure menu.
The tir epressur evalues stored at thel ast
re star tw ill continue tobe monitored. Ra
dio equipment appr oval of thet irep ressure
monitoring sy stem
Ra dio equipment appr oval numbers Countr
yRadio equipment appr oval
number
Argentina CNC
:H-12336
Model: Schrade rHSW4
Brazil MODELO: GG4
AN
ATEL: 0381-13-8001
Es te equipament ooper aem
caráter secundário, is toé, não
te md ireit oàp roteção cont rain‐
te rferência prejudicial, mesmo de
es tações do mesm otipo enão
pod ecausar inter ferê ncia asiste‐
mas operando em caráter pri‐
mário.
Jordan Kingdom of Jordan Type appr oval
fo rT yreP ressur eSensor and ECU
Manufacturer :Schrader Elect ron‐
ics Ltd.
Model :Mercedes HS Snap in 433
MHz
Ty pe Appr oval Numb er:
TRC/LPD/20 13/48
Ty pe Appr oval Numb er:L PD
Morocco AGREE PARL 'ANR TMAROC
MR79 07ANR T2013
Dat ed'agrement :05/03/20 13
Moldo va 210
Wheels and tires

Count
ry Radio equipment appr oval
number
Philip‐
pines NTC
Ty
pe Appr oved.
No: ESD-13 06995C
Singapo reComplies wit hIDA Standards
DA -103365
Sou th
Africa TA
-20 13/461
United
Arab Emi‐
ra tes
Abu Dhabi
and Dubai TRA
Re
gis tere dN o: ER0 104996/13
Dealer No: DA00470 74/10 Tir
elabeling Overvie
woftirel abeling 1
Unifor mTireQ uality Grading Standards
(/ page211 )
2 DOT(Depa rtment of Transpor tation), (TIN)
Ti re Identification Number (/ page212 )
3 Maximum tir eloa d( /pag e213 )
4 Maximum tirep ressur e(/ page 213)
5 Manu facturer
6 Characteristics of thet ire( /pag e213 ) 7
Tire size designation, load-beari ng capacity,
speed rating and load ind ex (/pag e213 )
8 Tire name
% The da
tashown in thei llustration is sample
data. Information on tir
equality grades Ac
cording tother equirements of theU .S.
Depa rtment of Transpor tation's "Uni form Tire
Quality Grading Standards" tir emanufacturers
mus tgrade their tires using thef ollowing three
per form anc efactors: 1
Tread weargrade
2 Traction grade
3 Temp eratur egrade
% The dat
ashown in thei llustration is sample
data.
% This grading is no
tlegall yprescribed forC an‐
ada,b ut specified in mos tcases anyw ay.
Tr ead weargrade
The tread wear grade is acomparativ egrading
based on tread wear grade testsc onducted
under controlled conditions on aspecified U.S.
Depa rtment of Transpor tatio nt esttrack .F or
ex ample, atireg raded 150w ould wear one and
one-half times as well on theg ove rnment test
trac kasat ireg 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 epractices and
dif fere nces in road characteristic sand climate
conditions. Wheel
sand tires 211

Tr
actio ngrade &
DANG ER Risk of acciden tdue toinade‐
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. #
Alwaysa dap tyour driving stylea nd
driv eatas peedtosuit thep reva iling
traf fica nd weather conditions. *
NO
TEDama getothed rive trai nfrom
wheelspin #
Avoid wheelspin. The traction grades
–fromh ighes ttolowest –
ar eA A, A, Band C. These grades relat etot he
tire's ability tocome toas tandstill on awetpave‐
ment under controlle dconditions on aspecified
U. S. go vernment test sur face mad efroma sphalt
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‐
lished forat iret hat is properly inflated and
no to verloaded. Excessiv espeed, underinfla‐
tion, or excessiv eloading, either separatel yor
in combination, can cause excessiv eheat
build-up and possible tir efailure. #
Obser vether ecommended tir epres‐
sures and regular lych eckt he tir epres‐
sur eofa ll tires including thes pare
wheel. #
Adjus tthe tir epressur easn ecessar y. The
temp eratur egrades ar eA(highes tgrade), B
and C. These relat etoat ire'sresis tance toheat
and its ability torelease heat on aspecified test
wheel in laborator ytests under cont rolled condi‐
tions. Sus tained high temp eratures can cause the
material of thet iretod egenerat eand reduce tire
life. In addition, excessivel yhigh temp eratures
can lead tosudden tir efailure. Grade Crefer sto
ap erform anc ewhicha ll passenger vehicle tires
mus texhibit, accordin gtotheU.S. Depa rtment
of Transpor tation's requ irements. Information on DO
Tand TIN (Tir eIdentifica‐
tion Number) U.
S. tir eregulations indicat ethat everyt irem an‐
ufacturer or retreade rmustimp rint aT IN in or on
th es ide wall of eac htirep roduced. %
The dat
ashown in thei llustration is sample
data.
The TIN is aunique identification number fort ires
and consists of thef ollowing components:
R DOT(Department of Transportation): tire
symbol 1indicates that thet irec omplies
wit hthe requ irements of theU .S. Depa rtment
of Transpor tation.
R Manufacturer identi fication code: manu‐
fa cturer identification code 2prov ides infor‐
matio nabout thet irem anufacturer .New tires
ha ve ac odew itht wo symbols. Retreaded
tires ha veac odew ithf our symbols.F or fur‐
th er information about retreade dtires, see
(/ page 216).
R Tire size: identifier 3describes thet ires ize.
R Tire type code: tiret ypec ode 4can be
used bythem anufacturer as acode to
describe specific characteristic softhe tire.
R Dat eofm anufactu re:date of manufacture
5 prov ides informatio nabout thea geof a
tire. The 1s tand 2nd number sindicat ethe
calendar week and the3 rdand 4t hnumbers
indicat ethe year of manufactur e(e.g. "3208"
re fers to the3 2ndw eek of they ear 2008). 212
Wheels and tires

Information on maximum tir
eload %
The dat
ashown in thei llustration is sample
data.
Maximum tir eload 1isthem aximum permissi‐
ble weight forw hichthe tir eisa pprove d.
Do no toverload thet ires by ex ceeding them axi‐
mum permissible load. The maximum permissible
load can be found on thev ehicle's Tire and Load‐
ing In form atio nplacar dont he B-pillar on thed riv‐
er's side . Information on maximum tir
epressure %
The dat
ashown in thei llustration is sample
data.
Maximum permitted tir epressure 1mus tnever
be exc eeded. Alw ayso bser vether ecommended
tir ep ressur efor your vehicle when adjusting the
tir ep ressur e(/pag e207). Information on tir
echaracteristics %
The dat
ashown in thei llustration is sample
data.
This information describes thet ype of tir ecord
and then umber of la yers in side wall1 and
under tir etread 2. Ti
re size designation, load-bearing capacity,
speed ratin ga nd load index &
WARNING Risk of inju rythro ugh exceed‐
ing thes pecified tir eload-bearing capa‐
city or thep ermissible speed rating
Exceeding thes pecified tir eload rating or the
permissible speed rating ma ylea dtot ire
dama geand tothet 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. 1
Firstletter(s)
2 Nominal tir ewidthinm illimeters
3 Aspect ratio (i npercent)
4 Tire code
5 Rimd iame ter
6 Load-bearing index
7 Load index
8 Speed rating
% The da
tashown in thei llustration is sample
data.
Fu rther information about reading tir edatac an
be obtaine dfroma nyqualified specialis twork‐
shop.
First letter(s) 1 1:
R "LT": light truc ktires in acco rdanc ewithUS
manufacturer standards.
R "C": tires forc ommercial usage in accordance
wit hE uropean manufacturer standards. Wheel
sand tires 213

Aspec
tratio (in percent) 3 3:
The size ratio betwee nthe tir eheight and tire
widt hand is shown in percent (tir eheight divided
by tirew idth ).
Tir ec ode 4
4 (tire type):
R "R": radial tire
Rim diam eter 5 5:
The diame teroft he bead seat (no tthe diame ter
of ther im flange). The rimd iame teriss pecified in
inches (in).
Load-bearing index 6 6:
Nu merical code whic hspecifies them aximum
load-bearing capacity of atire( "91" equals, e.g.
1, 356 lb (6 15kg)).
Th et irel oad-bea ring capacity mu stbe at least
half theg ross axle weight rating of thev ehicle.
Do no toverload thet ires by ex ceeding them axi‐
mum permissible load.
See also:
R Maximum permissible load on theT irea nd
Loading In form atio nplacard
R Maximum tir eload (/ page213 )
R Load index
Spee drating 8 8:
Specifies thea ppr ove dm aximum speed of the
tire.
% An electroni
cspeed limiter pr events your
ve hicle from exceeding aspeed of 130m ph
(2 10 km/h).
Ensu rethat your tires ha vether equired speed
ra ting .You can obtain information on the
re qu ired speed rating at aMercedes-Benz Com‐
mercial VanC enter.
Summe rtires Inde
xS peedrating
LU pto75mph (120 km/h)
MU pto81mph (130 km/h)
NU pto87mph (140 km/h)
PU pto93mph (150 km/h)
QU pto100mph(160k m/h)
RU pto106mph(170k m/h) Summer
,all-season and winter tires Inde
xS peedrating
LM +S1
Upto75 mph(120k m/h)
MM +S1
Upto81 mp h(130k m/h)
NM +S1
Upto87 mph(140k m/h)
PM +S1
Upto93 mph(150k m/h)
QM +S1
Upto100m ph (160 km/h)
RM +S1
Upto118m ph (170 km/h) 1
:or" M+S 004D"f or winter tires.
Wi nter tires ar emarke dw itht he 004D snowflake
symbol and fulfill ther equirements of theR ubber
Manufacturer sAssociation (RMA) and theR ubber
Associatio nofCanada (RAC) rega rding thet ire
traction on sno w.
Load index 7 7:
R "Light load": light load tire
R "C": commercial tires Information on definitions (tires and load‐
ing)
Ti re stru ctu reand characteristics: describes
th en umber of la yers or then umber of rubber-
coated la yers inthet iret read and thet irew all.
These ar emade of steel, nylon, pol yester and
ot her materials.
Bar: metric unit fort irep ressu re.
14 .5038 pounds per squar einc h( psi) and
10 0k ilopascals (kPa) ar ethe equivalent of 1bar.
DO T(Department of Transportation): DOT
mar kedt ires fulfill ther equirements of the
U. S. Depa rtment of Transpor tatio n.
Av erag eweight of vehicl eoccupants: the
number of occupants forw hichthe vehicle is
designed multiplied by150lbs (68 kg).
Un ifor mT ireQ uality Grading Standards: auni‐
fo rm standar dtog rade theq uality of tires with
re ga rdstot read quality ,tiret raction and temp er‐
atur echaracteristics. The quality grading assess‐
men tism adebythem anufacturer in accordance
wit htests pecifications of theU .S. go vernment.
The quality grade of atireisi mprinted on the
side wall of thet ire.
Re commended tir epressu re:ther ecommen‐
ded tir epressur eist he pressur especified fort he
tires ins talled on thev ehicle at thef actor y. 214
Wheels and tires

The
Tire and Loadin gInforma tionp lacar dcon‐
ta ins ther ecommended tir epressures forc old
tires, them aximum permissible load and the
maximu mpermissible vehicle speed.
The tir epressur etable con tains ther ecommen‐
ded tir epressures forc old tires under various
operating conditions, i.e. load and/or speed of
th ev ehicle.
Increased vehicl eweight due tooptional
equipment: thec ombined weight of all standard
and optional equipmen tavailable fort he vehicle,
re ga rdless of whe ther it is actually ins talled on
th ev ehicle or not.
Rim: thep artoft he wheel on whic hthe tir eis
ins talled.
GA WR (Gross AxleW eightRating): GAWR is the
gross axle weight rating .The actual load on an
axl em ustn eve rexceed theG ross Axle Weight
Ra ting .You can find theG ross Axle Weight Rating
on theB -pillar on thed rive r's side.
Speed rating: thes peed rating is pa rtof thet ire
identification .Itspecifies thes peed rang ef or
whic hatireisa pprove d.
GV W( Gross Vehicl eW eight): theG ross Vehicle
We ight includes thew eight of thev ehicle includ‐
ing fuel, tools, thes par ew heel, accessories
ins talled, occupants, luggag eand thet railer
dr aw bar nose weight if applicable. The Gross Vehi‐
cle Weight mus tnever exceed theG ross Vehicle
We ight Rating (GVWR )specifie donthe B-pillar on
th ed rive r's side.
GV WR (Gross Vehicl eW eight Rating): the
GV WR is them aximum permitted gross weight of
th ef ully laden vehicle (weight of thev ehicle
including all accessories, occupants, fuel, lug‐
ga ge and thet railer dr awbar nose weight if appli‐
cable). The Gross Vehicle Weight Rating is speci‐
fi ed on thev ehicle identification plat eonthe B-
pillar on thed rive r's side.
Maximum weight of thel aden vehicle: the
maximu mweight is thes um of thev ehicle's curb
we ight ,weight of thea ccessories, maximum load
and thew eight of thef actor yins talled optional
equipment.
Kilopascal (kPa): metric unitfort irep ressu re.
6.9 kP aarethee quivalent of 1psi. Ano ther unit
fo rt irep ressu reis bar .100 kilopascals (kPa) are
th ee quivalent of 1bar.
Load index: in additiontothel oad-bearing index,
th el oad inde xmayalso be imprinted on thes ide‐
wa ll of thet ire. This specifies thel oad-bearing
capacity mor eprecisel y. Cur
bw eight: thew eight of avehicle wit hstand‐
ar de quipmen tincludin gthe maximum capacity
of fuel, oil and coolant. It also includes thea ir-
conditioning sy stem and optional equipment if
th ese ar einstalled on thev ehicle, but does not
include passenger sorluggage.
Maximum tir eload: them aximum tir eload is
th em aximum permissible weight in kilog rams or
lbs forw hichat ireisa pprove d.
Maximum permissible tir epressure: maximum
permissible tir epressur efor one tire.
Maximum load on one tire: maximum load on
one tire. This is calculated bydividing them axi‐
mum axle load foro ne axle bytwo.
PSI (pounds per squar einch): standar dunit of
measuremen tfor tir epressu re.
Aspec tratio: relationship between tir eheight
and tir ewidthinp ercent.
Ti re pressure: pressureinside thet irea pplying
an outwar dforce toeve rysquar einc hoft he
tire's sur face. The tir epressur eiss pecified in
pounds per squar einc h( psi), in kilopascal (kPa)
or in bar .The tir epressur eshould onl ybecorrec‐
te dw hen thet ires ar ecold.
Ti re pressur eoncoldt ires: thet ires ar ecold
when thev ehicle has been par kedw itht he tires
out of direct sunlight foratl east thre eh our sand
th ev ehicle has been driven less than 1m ile
(1.6 km).
Ti re contact sur face: thep artoft he tir ethat
comes int ocontact wi th theroad.
Ti re bead: thep urpose of thet ireb ead is to
ensur ethat thet ires its securely on thew heel
ri m. Ther eareseveralw irec ores in thet ireb ead
to preve ntthet iref romc hanging lengt honthe
whee lrim.
Sid ew all: thep artoft he tir ebetwe en thet read
and thet ireb ead.
Special equipment weight: thec ombined
we ight of those optional extras that we igh more
th an ther eplaced standar dparts and mor ethan
5l bs (2. 3kg). These optiona lextras ,suc has
high-pe rformance brakes, le velc ontrol sy stem, a
ro of luggag erackorah igh-perform anc ebatter y,
ar en otincluded in thec urb weight and the
we ight of thea ccessories.
TIN (Tir eIdentification Number): auniqu eiden‐
tification number whic hcan be used byatire
manufacturer toidentify tires, fore xamp lefora
product recall, and thus identif ythe pur chasers.
The TIN is made up of them anufacturer identifi‐ Wheels and tires
215

cation code
,tires ize,tiret ypec ode and them an‐
ufacturing date.
Load-bearing index: thel oad-bearing inde x(also
load index) is acode that con tains them aximum
load-bearing capacity of atire.
Tr action: traction is ther esult of friction between
th et ires and ther oad sur face.
We ar indicator: narrow bars(tread wear bars)
th at ar edistributed overthe tir etread. If thet ire
tread is le velw itht he bars, thew ear limit of
1/1 6in( 1.6m m) has been reached.
Distribution of vehicl eoccupants: distribution
of vehicle occupants overdesignated seat posi‐
tions in avehicle.
Maximum permissible pa yload weight: nomi‐
nal load and luggag eload plus 150lbs (68 kg)
multiplied bythen umber of seats in thev ehicle. Changing
awheel Note
sons electing, installing and replacing
tires Yo
uc an ask fori nformation rega rding permit ted
wheel/tir ecombinations at aqualified specialist
wo rkshop. &
WARNING Risk of inju rythro ugh incor‐
re ct size sofwheels and tires
If wheels and tires of thew rong size are
ins talled, thew heel brakes or components in
th eb rake system and in thew heel suspen‐
sion ma ybedamaged. #
Alwaysr eplace wheels and tires with
th ose that fulfill thes pecification softhe
original part.
Fo rw heels, pa yattention tothef ollowing:
R Designation
R Type
Fo rtires, pa yattention tothef ollowing:
R Designation
R Manufacturer
R Type &
WARNING Risk of inju rythro ugh exceed‐
ing thes pecified tir eload-bearing capa‐
city or thep ermissible speed rating
Exceeding thes pecified tir eload rating or the
permissible speed rating ma ylea dtot ire
dama geand tothet 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
TEVehicle and tir edamag ethrough
tir et ype sand sizes that ha venotb een
appr oved Fo
rs afet yr easons, onl yuse tires, wheels and
accesso ries whic hhave been specially
appr ovedbyM ercedes-Benzf oryour vehicle.
These tires ha vebeen speciall yadap tedf or
use wit hthe contro lsystems, suc hasABS or
ESP ®
.
Otherwise, cer tain properties ,suc hash an‐
dling characteristics, vehicle noise and con‐
sum ption could be adversel yaffected. Fur‐
th ermore, other tir esize could result in the
tires rubbing agains tthe body and axle com‐
ponents when loaded. This could result in
damag etothe tireort hevehicle. #
Onlyuse tires, wheels and accessories
th at ha vebeen checkeda nd recommen‐
ded byMercedes-Benz. *
NO
TEDriving sa fety pu tatriskbyretrea‐
de dt ires Re
treade dtires ar enotcheckedorr ecom‐
mended byMercedes-Benz, as pr evious dam‐
ag eisn otalw aysd etected during ther etre ad
process.
Driving sa fety cannot, therefore, be guaran‐
te ed. #
Do no tuse used tires when their pr evi‐
ous usag eisunknown. *
NO
TEPossible wheel and tir edamage
when driving overobstac les Lar
gewheels ha vealow er tir esection width.
As thes ection widt hdecreases, ther isk of
wheel sand tires being damaged when driving
ove robstacles increases. 216
Wheels and tires

#
Avoid obs tacles or driv eoverthem with
particular care. #
Reduce speed when driving overcurbs,
speed bumps, manhol ecoversa nd pot‐
holes. #
Avoid especially high curbs. *
NO
TEDama getoelectronic component
parts thro ugh theu se of tire-ins talling
to ols Ve
hicles with atirep ressur emonitoring
sy stem: ther ea reelectronic component
parts in thew heel. Tire -ins talling tools should
no tbea pplied in thea reaoft hevalve.
Otherwise, thee lectronic componen tparts
could be damaged. #
Alwaysh ave tires changed at aqualified
specialis tworks hop. Ac
cessories that ar enotappr ovedfor your vehi‐
cle byMercedes-Benz, or ar enotbeing used cor‐
re ctly ,can impair ope rating sa fety.
Befor epurch asing and using non-appr oved
accesso ries, visit aqualified specialis tworks hop
and inquir eabout:
R Suitability
R Legal stipulations
R Factor yrecommendations
Obser vethef ollowing points when selecting,
ins talling and replacing tires:
R Use onl ytires and wheels of thes ame type,
design (winter tires, all-season tires) and
make.
R Onlyins tall wheels of thes ame size and tread
design on one axle (lef tand right).
It is onl ypermissible toins tallad iffe re nt
wheel size tothis in thee vent of aflat tir ein
order todriv etot he specialis tworks hop.
R Onlyins tall tires of thec orrect size ont othe
wheels.
R Ve
hicles with atirep ressur emonitoring
sy stem: all ins talled wheels mus tbeequip‐
ped wit hfunctioning sensor sfor thet irep res‐
sur em onitoring sy stem.
R Attemp eratures belo w50°F (10°C) use win‐
te rt ires or all-season tires wit hthe M+S
marking on all wheels. Wi
nter tires bearing the004D snowflak esym‐
bol in addition totheM +S marking pr ovide
th eb estp ossible grip in wintr yroad condi‐
tions.
R Only use tires wit hthe same tread.
R Obser vethem aximum permissible speed for
th ei nstalled tires.
If th is is belo wthe vehicle's maximum per‐
missible speed, this mus tbeindicated in an
appropriat elabel in thed rive r's field of vision.
R Break in ne wtires at moderat espeeds fort he
fi rs t60m iles (100 km).
R Replace thet ires af ters ixyearsatt he latest,
re ga rdless of wear.
Fo rm orei nformation on wheels and tires, con‐
ta ct aq ualified specialis tworks hop.
Be sur etoalso obse rvet he following fur ther rela‐
te ds ubjects:
R Notesont irep ressur e(/pag e206)
R Tire and Loadin gInforma tionp lacard
R Tire size designation, load-beari ng capacity,
speed rating and load ind ex (/pag e213 )
R Tire pressur etable
R Notesont he emer gency spa rewheel
(/ page222) Note
sonc hanging wheels &
WARNING Risk of inju rythro ugh dif fer‐
ent whee lsizes
Inter changing thef ront and rear wheels if the
wheels or tires ha vediffere nt dimensions may
se verely impair thed riving characteristics.
The wheel brakes or wheel suspension com‐
ponent smayalso be damaged. #
Rotate front and rear wheels onl yifthe
wheels and tires ar eofthe same dimen‐
sions. On
vehicles that ha vethes ame size front and
re ar wheels ,rotatet he wheels according tothe
inter vals in thet irem anufacturer's warrant ybook
in your vehicle documents. If this is no tavailable,
ro tate thet ires every3,000 (5,000) to
6,000 mile s(10 ,000 km) ,depending on the
degree of wear.E nsuret hat thed irection of rota‐
tio nism aintained. Wheel
sand tires 217

It is imperativ
etoobservethei nstruction sand
saf etyn otes on "Changing awheel" when doing
so. Size categories of wheels
The de
term ined vehicle speed is displa yedint he
instrument clus tera nd is impor tant forc ontrol‐
ling thed riving saf etys ystems and driving sys‐
te ms. The displa yaccuracy of thes peedome ter
and theo dome terisl egally prescribed .Determin‐
ing thes peed is dependent on thet ires ize or the
ro lling circumferenc eofthe tires. The rimd iame‐
te risa lway ss pecified in inches.
Fo rthis reason ,the vehicle contro lunit sc an be
coded fort he following wheel size categories: Wheel size categor
y1
19 5/65 R16C
205/65 R16C
225/60 R16C
225/55 R17C
225/55 R17XL
24 5/45 R18XL Wheel size categor
y2
225/55R17XL
235/55R17XL
24 5/55 R17XL
24 5/45 R18XL
24 5/50 R18XL
24 5/45 R19XL %
Mercedes-Benz
recommends that yous tay
within awheel siz ecategor ywhen changing a
tire. In this wa y,yo ua void recoding thec on‐
trol units. Due
tothel egall yprescribed accuracy of the
speedome tera nd odome terd ispla ys,the follow‐
ing tires ar enotpermit tedf or taxis and hir ecars:
R Wheel size catego ry 1
- 195/65 R16C
R Whee lsize categor y2
- 225/55 R17XL
- 245/45 R18XL
If th ew heel size categor ychanges, youm ust
ha ve your vehicle's contro lunit srecoded at a
qu alified specialis tworks hop. Information on
thed irection of thet ires' rota‐
tion Ti
re sw ithas pecified direction of rotatio nh ave
additional benefits ,e.g.ift hereisar isk ofhydro‐
planing. Youw ill only gain these benefits if the
cor rect directio nofrotation is obser ved.
An ar rowonthes ide wall of thet irei ndicates its
cor rect directio nofrotation.
Yo um ayalso ins tallas par ew heel agains tthe
direction of rotation. Obser vethet ime restriction
on use as well as thes peed limitation specified
on thes par ew heel. Information on
storing wheels Obser
vethef ollowing when storing wheels:
R Wheels that ha vebeen remo veds hould be
st ored in acool, dr yand, if possible, dark
place.
R Protect thet ires from oil, grease and fuel. Preparing
thev ehicle foraw heelchange Requ
irements:
R The tire-chang etool kit is available.
R The vehicle is no tonaslope.
R The vehicle is on solid, non-slipper yand le vel
ground. #
Appl ythe parking brake. #
Movethef ront wheels tothes traight-ahead
position. #
Vehicles with automatic transmission:
shif tthe transmission toposition 005D. #
Switc hoffthee ngine. #
Mak esuret hat thee ngine cann otbe star ted. 218
Wheels and tires