2019 MERCEDES-BENZ SLC ROADSTER tires

Tire
labelin g
Ov erv iew 0043
UniformTire Qu ality Grad ing Stand ard
(Y page 286 )
0044 DOT, Tire Ide ntifi cationNumbe r
(Y page 285)
0087 Maxim um tire load (Ypage 285 )
0085 Maxim um tire pressu re(Y page 273 )
0083 Manuf actu rer
0084 Tire ma teri al(Y page 286 )
006B Tire size designa tion,load -be aring capacity
and spee dra ting (Ypage 283 )
006C Loadind ex(Y page 285 )
006D Tire nam e
The markin gsdescri bedab ove areon the tire
in ad ditio nto the tire nam e(sales designa tion)
and themanuf actu rer'snam e.
i Ti
re data isveh icle-s pecificand mayde vi-
ate fromthe data inthe exampl e.
Tire size des ignati on,lo ad-b earing
ca pac ityand speedratin g G
WA
RNING
Excee ding the stated tire load -be aring capa-
city and theappro ved maxim um spee d
cou ldlead totire dama georthe tire burst-
ing .The reisaris kof acc ident.
The refore ,onl yus etire typesand sizes
ap pro ved foryour veh iclemod el.Ob ser ve the
tire load rating andspee dra ting
req uired foryour veh icle. 0043
Tire width
0044 Nom inalas pe ct ratio in%
0087 Tire cod e
0085 Rim diam ete r
0083 Loadbe aring index
0084 Spe edrating
Ge neral: dependi ng on the manuf actu rer's
sta nda rds,the size imp rinted inthe tire wall
ma ynot conta inany letters orma yconta in
one letter thatpre ced esthe size descri ption.
If the reisno letter preced ingthe size descri p-
tio n(a ssho wnabove ):the searepa sse nge r
veh icletire sacc ording toEur opeanma nuf ac-
tur ing standa rds.
If "P "pre ced esthe size descri ption: theseare
pa sse nge rveh icletire sacc ording toU.S. man-
uf actu ringsta nda rds.
If "L T" pre ced esthe size descri ption: theseare
li ght truck tire sacc ording toU.S. manuf actu r-
ing standa rds.
If "T "pre ced esthe size descri ption: comp act
eme rgency wheelswith high tire pressu retha t
ar eonl yde signe dfor temp oraryusein an
eme rgency .
Tire width: tirewidth 0043sho wsthe nomi nal
tire width inmil limete rs.
He ight-w idth ratio :as pe ct ratio 0044 isthe size
ra tio betwe enthe tire height and tirewidth
and issho wninpe rcen t.The aspe ct ratio is
cal cul ate dby divid ing the tire width bythe tire
he ight.
Tire code: tire code0087 speci fiesthe tire type.
"R "rep resents radial tire s;"D" represents
di ag ona ltire s;"B" represents diag ona lra dial
tire s. Al
labo utwhee lsan dtire s
283Whe elsand tires Z

Optionally
,tires withamaximum speedofover
149 mph (240km/h )may have "ZR"in the
size description, dependingonthe manufac-
turer (e.g.245/4 0ZR 18).
Rim diameter: rimdiameter 0085isthe diame-
ter ofthe bead seat,notthediameter ofthe
rim flange. Therimdiameter isspecified in
inches (in).
Load-bearing index:load-bea ringindex 0083is
a numerical codethatspecifies themaximum
load-bea ringcapacity ofatire.
Do not overload thetires byexceeding the
specified loadlimit. Themaximum permissible
load canbefound onthe vehicle's Tireand
Loading Information placardonthe B-pillar on
the driver's side(Ypage 279).
Example:
Load-bearing index91indicates amaximum
load of1,356 lb(61 5kg) that thetires can
bear. Forfurther information onthe maximum
tire load inkilograms andlbs,see
(Y page 285).
For further information onthe load bearing
index, see"Load index" (Ypage 285).
Speed rating: speedrating0084specifies the
approved maximum speedofthe tire.
i Tire
data isvehicle-specific andmay devi-
ate from thedata inthe example.
Rega rdless ofthe speed rating, alwaysobserve
the speed limits. Drivecarefully andadap t
your driving styletothe traffic conditions. Summer
tires Index Speed
rating Q up
to100 mph (160 km/h) R up
to106 mph (170 km/h) S up
to112 mph (180 km/h) T up
to118 mph (190 km/h) H up
to130 mph (210 km/h) V up
to149 mph (240 km/h) W up
to168 mph (270 km/h) Y up
to186 mph (300 km/h) ZR...Y up
to186 mph (300 km/h) Summer
tires Index Speed
rating ZR...(..Y) over
186mph (300km/h ) ZR over
149mph (240km/h ) R
Optionally ,tires withamaximum speedof
over 149mph (240 km/h) mayhave "ZR"in
the size description, dependingonthe man-
ufacturer (e.g.245/4 0ZR18 ).
The service specification ismade upofload-
bearing index0083and speed rating0084.
R Ifthe size description ofyour tireincludes
"ZR "and there arenoservice specifications,
ask thetire manufacturer inorder tofind
out themaximum speed.
If aservice specification isavail able, the
maximum speedislimited according tothe
speed ratinginthe service specification.
Example: 245/40ZR18 97Y.Inthis exam-
ple, "97Y"isthe service specifica tion.The
letter "Y"represents thespeed rating. The
maximum speedofthe tire islimi ted to
186 mph (300 km/h).
R The size descriptio nfor alltires withmaxi-
mum speed sof over 186mph (300 km/h)
must include "ZR",and theservice specifi-
cation mustbegiven inparentheses .Exam-
ple: 275/40 ZR18 (99 Y).Speed rating"(Y)"
indicates thatthemaximum speedofthe
tire isover 186mph (300 km/h). Askthe
tire manufacture rabou tthe maximum
speed . All
-
weather
tires
and win-
ter tires Index Speed
rating Q
M+S 1 up
to100 mph (160 km/h) T
M+S 1 up
to118 mph (190 km/h) H
M+S 1 up
to130 mph (210 km/h) V
M+S 1 up
to149 mph (240 km/h) 1
Or M+S 004D forwinter tires. 284
Al
labout wheelsand tiresWheel sand tires

i
Not
alltires withtheM+S marking provide
the driving characteristics ofwinter tires.In
addi tion tothe M+S marking, wintertires
also have the004D snowflake symbolonthe
tire wall.Tires withthismarking fulfillthe
requi rements ofthe Rub ber Manufa cturers
Association (RMA)andtheRub ber Associa-
tion ofCana da(RAC) regardi ngthe tire trac-
tion onsnow. Theyhave been especia lly
develo pedfordriving onsnow.
An electronic speedlimiter prevents yourvehi-
cle from exceeding aspeed of130 mph
(210 km/h).
The speed ratingoftires mounted atthe fac-
tory may behigher thanthemaximum speed
that theelectronic speedlimiter permits.
Make surethatyourtires have therequi red
speed rating, e.g.when buying new tires. The
requi redspeed ratingforyou rvehicle canbe
found inthe "tires" section (Ypage 292).
Further information aboutreadi ngtire data
can beobtained fromanyqualifiedspecia list
workshop.
Load index In
addi tion tothe load -bearing index,load
index 0043may alsobeimprinted onthe side-
wal lof the tire. Youwillfind thisafter thelet-
ter that identifies thespeed rating
(Y page 283).
R Ifno specifica tionisgiven: notext (asinthe
example above),represents astandard load
(SL) tire
R XL orExt raLoad: represents areinforced
tire
R Light Load: represents alight loadtire
R C, D, E:represents aload range that
depends onthe maximum loadthatthetire
can carry atacertain pressure i
Tire
data isvehicle-spe cificandmay devi-
ate from thedata inthe example .
Maximum loadrating Maximum
tireload 0043isthe maximum permis-
sible weightfor which thetire isapprove d.
Do not overloa dthe tires byexceeding the
specifie dload limit. Themaximum permissible
load canbefound onthe vehicle's Tireand
Loadi ngInformation placardon the B-pilla ron
the driver's side(Ypage 279).
i The
actual valuesfor tires arevehicle-spe -
cific andmay devia tefrom thevalu esinthe
illu stration.
DOT, TireIdentifi cationNumber (TIN) US
tire regul ations stipulatethat every tire
manufacturer orretreader mustimprint aTIN
in or on the sidew allofeach tireproduced . The
TINisauniqu eidentification number.The
TIN enable sthe tire manufacturers orretread-
ers toinform purchase rsof recalls andother
safety-rele vantmatters. Itmakes itpossib le
for the purchase rto easi lyidentify theaffected
tires. All
about wheelsand tires
285Wheelsand tires Z

The
TINismade upofmanufact ureridentific a-
tion code 0044,tire size 0087,tire type code 0085
and manufact uringdate0083.
DOT (Departm entofTra nsport ation): tire
symbol 0043marks thatthetire complies with
the requirement sof the U.S. Departm entof
Transport ation.
Manufa ctureridentification code:manufac-
turer identific ationcode0044provides detailson
the tire manufact urer.Newtireshave acode
with twosymbols. Retreaded tireshave acode
with foursymbols.
For further informationabout retreaded tires,
see (Ypage 292).
Tire size: identifier 0087describes thetire size.
Tire typecode: tiretype code 0085can beused
by the manufact urerasacode todescribe
specific characteristics ofthe tire.
Date ofmanu factur e:date ofmanufact ure
0083 provides informationabout theage ofa
tire. Thefirst andsecond positions represent
the week ofmanufact ure,start ingwith "01"
for the first calendar week.Positions threeand
four represent theyear ofmanufact ure.For
example, atire that ismarked "3214"was
manufact uredinweek 32in2014 .
i Tire
data isvehicle-spec ificand may devi-
ate from thedata inthe example.
Tire chara cteristics This
inform ationdescribes thetype oftire cord
and thenumber oflayers insidewall 0043and
under tiretread 0044.
i Tire
data isvehicle-spec ificand may devi-
ate from thedata inthe example. Definition
ofterm sfor tires andload-
ing Tire
plycomposition andmaterial used
Descr ibesthenumber ofplies orthe number
of layers ofrubber-coat edfabric inthe tire
tread andsidewall .These aremade ofsteel,
nylon, polyester andother materials.
Bar
Metric unitfortire pressure. 14.5038pounds
per square inch(psi) and100 kilopascals (kPa)
are the equivalent of1bar.
DOT (Departm entofTransport ation)
DOT- marked tiresfulfill therequirement sof
the USDepartm entofTransport ation.
Norm aloccupant weight
The number ofoccupant sfor which thevehicle
is designed multiplied by68 kilograms
(150 lbs).
Uniform TireQuality Grading Stand ards
A uniform standard tograde thequality oftires
with regards totread quality, tiretract ionand
temperat urecharact eristics. Thequality grad-
ing assessment ismade bythe manufact urer
following specification sfrom theU.S. govern-
ment .The ratings aremolded intothesidewall
of the tire.
Recommended tirepressur es
The recomm endedtirepressure appliestothe
tires mounted atthe factor y.
The Tire andLoading Information placard con-
tains therecomm endedtirepressures forcold
tires onafully loaded vehicle andforthe maxi-
mum permissible vehiclespeed.
The tirepressure tablecontains therecom-
mended pressures forcold tires forvarious
operating conditions,i.e.differing loadand
speed conditions.
Increased vehicleweightduetooptional
equipm ent
The combined weightofall standard and
optional equipment availablefor the vehicle,
regardless ofwhether itis actually installed on
the vehicle ornot . 286
All
about wheelsand tiresWheels andtires

Rim
Thi sis the partof the whe elon whi chthe tire
is mou nted.
GAW R(Gro ssAxleWei ght Ratin g)
The GAW Ris the maxi mum grossaxl ewe igh t
rati ng. The actu alloa don anaxlemus tneve r
excee dthe gros saxl ewe igh trati ng. The gros s
axl ewe igh trati ngcan befou ndonthe vehi cle
id entif ication plate onthe B-pi llar on the driv-
er's side.
Spe edrating
The speedrati ngispa rtof the tire identif ica-
tion. Itspe cifiesthe speedrang efor whi chthe
tire isap pro ved .
GVW (GrossVehi cle Wei ght)
The gros svehi cleweigh tincl udes the weigh t
of the vehi cleincluding fuel,tool s,the spare
whe el,acce ssoriesinsta lled, occu pants, lug-
ga ge and thedrawbarnose weigh t,ifap plica -
bl e. The gros svehi cleweigh tmus tnot excee d
the gros svehi cleweigh trati ngGVW Ras spe ci-
fie don the vehi cleidentif ication plate onthe
B-pi llar on the driver' ssid e.
GVWR (GrossVehi cle Wei ght Ratin g)
The GVW Ris the maxi mum permis siblegros s
we igh tof aful lyloa ded vehicle(the weigh tof
the vehi cleincluding allacce ssories,occu -
pa nts, fuel,lu gga geand thedrawbarnose -
we igh t,ifap plica ble). The gros svehi cleweigh t
rati ngisspe cified on the vehi cleidentif ication
pl ate onthe B-pi llar on the driver' ssid e.
Maxi mum loaded vehicle we ight
The maxi mum weigh tis the sum of:
R the curb weigh tof the vehi cle
R the weigh tof the acce ssories
R the loadlimit
R the weigh tof the facto ryinsta lled opti onal
equ ipment
Ki lopasc al(kP a)
Metri cuni tfor tire pressu re.6.9 kPa corre -
spo nds to1psi .Another unitfor tire pressu re
is ba r.100 kilopa scals(kPa )are the equivalent
of 1ba r. Lo
ad index
In addition tothe load-be aring index, the load
ind exmay also be imp rinte don the sidewallof
the tire.Thi sspe cifiesthe load-be aring cap a-
city more precise ly.
Curb weight
The weigh tof avehi clewith stand ardequip-
ment including the maxi mum capacityof fue l,
oil and coolant. Italso incl udes the air-condi -
tioni ngsystem andoptionalequ ipment ifthes e
are insta lled inthe vehi cle,bu tdoe snot
incl udepa sse ngers orlugga ge.
Maxi mum load rating
The maxi mum loadrati ngisthe maxi mum per-
mis siblewe igh tin kilogra msorlbsfor whi cha
tire isap pro ved .
Maxi mum permis sibl etire press ure
Ma ximu mper mis sibletire pressu refor one
tire .
Maxi mum load on onetire
Ma ximu mloa don one tire.Thi sis cal cul ate d
by divid ing the maxi mum axleloa dof one axle
by two.
PSI (pounds persquare inch)
A stand ardunitof mea sure for tire pressu re.
As pec tratio
Re lations hipbetw eentireheight and tirewidth
in per cent.
Tire press ure
Thi sis pre ssu reinsi dethe tire applying anout-
wa rdforce toeach squ are inch ofthe tire's
su rfa ce. The tirepressu reisspe cified in
pou nds persquare inch (psi) ,in kilopa scal
(kPa )or inba r.The tirepressu resho uld only
be corre ctedwhenthe tiresare cold .
Co ldtire press ure
The tiresare cold :
R ifthe vehi clehasbee npa rked with the tires
ou tof direct sunli ght foratleas tthree hours
and
R ifthe vehi clehasnot beendri ven further
than 1mil e(1.6 km) Al
labo utwh eelsand tires
287Wheelsand tires Z

Tread
The partof the tire thatcome sinto conta ct
wi th the road.
Bead The tirebead ensu resthatthe tire sits
sec urelyon the wheel.The rearesev eralstee l
wi res inthe bead topre vent thetire from com-
ing loose from thewheelrim .
Si dew all
The partof the tire betwe enthe trea dand the
be ad.
Wei ght ofopti onalextras
The comb inedwe ight ofthos eop tio nal extra s
tha twe igh mor etha nthe replaced standa rd
pa rts and moretha n2.3 kg(5lbs).The se
op tio nal extra s,su ch ashigh-p erform ance
bra kes, level contro l,a roo fra ck orahigh-p er-
form ance battery ,ar enot included inthe curb
we ight and theweight ofthe acce ssories.
TIN (Tire Ide ntificatio nNumbe r)
Thi sis auni queidenti fierwh ich can beused
by atire manuf actu rertoidenti fytire s,for
exa mpl efor apro duct reca ll, and thusid enti fy
the purcha sers.The TINisma de up ofthe
ma nuf actu rer'sidenti tycod e,tire size, tire
typ ecod eand themanuf actu ring date.
Lo ad bearin gin dex
The load bearing index(also load index) isa
cod etha tconta insthe maximu mload bearing
cap acityof atire .
Tracti on
Tra ctio nis the resultof frictio nbe twe enthe
tire sand theroadsu rfa ce.
Treadw earindic ators
Na rro wba rs (tre adwearbars) thatar edistri b-
ute dove rthe tire trea d.Ifthe tire trea dis level
wi th the bars, the wearlimit of00CD in(1.6 mm)
ha sbe en rea che d.
Oc cupant distrib utio n
The distri butio nof occu pants inaveh icleat
thei rde signa ted seating positio ns.
Total load limit
Nom inallo ad and lugga geload plus 68 kg
(15 0lbs) mu ltiplied by the num berof sea tsin
the vehicle. Ch
ang ingawh eel Fl
at tire
The "Breakdo wnassista nce" section
(Y page 252 )conta insinfo rma tionand note s
on how todealwith afla ttire .Info rma tionon
dri ving with MOExte ndedtire sin the eventofa
fla ttire can befou ndund er"M OExtend edtire s
(ti res with run-fla tcha racteri stics"
(Y page 253 ). Rotati
ngthe wheels G
WA
RNING
Ro tati ngthe fron tand rearwh eelsifthe
wh eelsor tire sha ve diffe rent dimens ions
ma ysev erelyimp airthe driving characteri s-
tics .The servicebra keorwh eelsu spe nsion
comp onents mayal so be dama ged. The reis
a ris kof an acci dent.
Ro tate frontand rearwh eelsonl yif the
wh eelsand tiresar eof the same dimen-
si ons.
! On
veh icles equipp ed with atire pressu re
moni tor,electro niccomp onents arelocate d
in the wheel.
Ti re-m ounting toolssho uld not beused nea r
the valve .Thi scou ldda ma gethe electro nic
comp onents.
Onl yha ve tire scha nge dat aqu alifi ed spe -
cia list wo rksh op.
Alw ayspa yatte ntionto the instructio nsand
sa fety note swh en cha nging awh eel
(Y page 289 ).
The wearpatterns onthe fron tand reartire s
di ffe r,de pendi ng on the opera ting cond itions.
Ro tate thewheelsbe fore acle arwe arpattern
ha sform edon the tires.Front tirestyp ically
we armor eon the shoulde rand reartire sin
the cente r.
On veh icles tha tha ve the same size front and
rea rwh eels,yo ucan rotatethe wheelsacco rd-
ing tothe intervalsin the tire manuf actu rer's
wa rranty book inyour veh icledo cum ents. Ifno
wa rranty book isavaila bl e, the tiressho uld be
rota tedevery3,0 00 to6,0 00 miles(5,000 to
10, 000 km).Dep endingontire wear,thi sma y
be req uired earlier. Do not change thedirec-
tio nof wh eelrota tion. 28
8 Ch
ang ingawh eelWhe elsand tires

Clean
theco ntact surf aces ofthewheel and
th ebrak edisc thoro ughly everytim eawheel
is rot ate d.Chec kth etir epre ssur eand ,if ne c-
ess ary, restartth etir epre ssur eloss warn ing
syst emorthetir epre ssur emon itor. Direct
ionofrot ation
Tire swit haspec ifieddire ction ofrot atio nhave
addit ionalben efits,e.g .if th ere isaris kof
hydr oplan ing.Thes eadvan tagescan onlybe
gain edifth etir es are install ed correspo nding
to thedire ction ofrot atio n.
An arrow onthesidew allofthetir eind icat es
its correct dire ction ofrot atio n. St
ori ng wheels
St ore wheel sth at are notbein gused inaco ol,
dry and preferably dark place.Pro tect thetir es
fr om oil,grease, gaso lineand diese l. Mou
nting awheel
Pr epa ringth evehi cle X
Stop theveh icle onsolid ,no n-slipp eryand
leve lgro und.
X Ap ply theelec tric park ingbrak eman ually.
X Bring thefron twheel sint oth est raigh t-
ahead position.
X Sh ift thetrans mis sion toposi tion005D.
X Swit choff theen gin e.
X Veh icles withoutKEYLESS- GO:remove
th eSm artKey from theign ition lock.
X Veh icles withKEYLESS- GO:open thedriv -
er' sdoor .
The vehicle elec tron ics nowhave status 0.
This isthesame astheSm artKey having
been removed.
X Veh icles withKEYLESS- GO:remove the
St art /S topbut tonfrom theign ition lock
(Y page 118).
X Ifinc luded intheveh icle equipm ent,rem ove
th etir e-ch ang eto ol kit from theveh icle.
X Saf eguar dth eveh icle again stroll ing away.
i Due
todiff ere nces inveh icle equipm ent,
no tall veh iclesare equipp edwithatir e-
ch ang eto ol kit .For inform ationon whic h to
ols are required toper formawheel
ch ang eon your vehicle,co nsult anauth or-
ize dMer cedes-Ben zCen ter.
Nec essary tire-ch ang ingtools can include,
for example :
R Jack
R Whee lch oc k
R Lug wren ch
Secur ingthevehi cletoprevent itfrom
rol ling away If
your vehicle isequipp edwithawheel choc k,
it can befoun din thetir e-ch ang eto ol kit
(Y page 252).
The foldingwheel choc kis an addit ionalsafe ty
meas uretopre ven tth eveh icle from rolling
away, forexample whenchang ingawheel .
X Fol dbot hplat esupward s0043.
X Fol dout lower plate0044.
X Guide thelugs onthelower platefully into
th eopen ingsin base plate0087. X
Plac ech oc ks orother suitable items unde r
th efron tand rear ofthewheel that isdiago-
nall yoppo siteth ewheel youwish to
ch ang e. Cha
nging awheel
289Wheels andtires Z

Rais
ingthe vehic le G
WARNI
NG
If yo udo not position the jack corre ctlyat
the appro priate jacki ngpointofthe vehicle,
the jack couldtip ove rwi th the vehicle
rai sed .The reisaris kof inju ry.
Only position the jack atthe appro priate
jacki ngpointofthe vehicle. The base ofthe
jack mustbe pos itioned vertically,di rectl y
und erthe jacki ngpointofthe vehicle.
! Only
position the jack atthe appro priate
jacki ngpointofthe vehicle. Othe rwise, you
cou ldda mag ethe vehicle.
Obs erve thefollowi ng when raising thevehi-
cle :
R To raise the vehicle, only usethe vehicle-
spe cificjack thathasbee nteste dand
ap pro ved byMer cedes-Be nz.Ifus ed inco r-
rectl y,the jack couldtip ove rwi th the vehi-
cle raised .
R The jack isdes igned only toraise and hold
the vehiclefor asho rttime while awh eel
is bei ng cha nged .It mus tnot beused for
per formi ngmai ntenance workund erthe
veh icle.
R Avoi dcha nging thewheel onuphilland
dow nhillslo pes .
R Befo reraising thevehicle, secu reitfrom
rol ling away by applying the parking brake
and inserting wheel chocks .Do not disen-
ga ge the parking brakewhile the vehicleis
rai sed .
R The jack mustbe place don afirm ,fla tand
non-sl ipsurfa ce. Onaloose surfa ce, alarge ,
fla t,load -bea ring underlay mus tbe used. On
a sli pp ery surfa ce, anon-sl ipund erlay mus t
be used, e.g. rubber mats .
R Do not usewo ode nblocks orsim ilar obje cts
as ajack underlay.Othe rwise, the jack will
not beableto ach ieve its load -bea ring capa-
city dueto the restricte dhei ght.
R Ma kesure that thedistance betweenthe
und erside of the tiresand theground does
not excee d1.2 in(3 cm).
R Neve rpl ace your hands and feetund erthe
rai sed vehicle.
R Do not lie und erthe vehicle.
R Do not startthe engi newhen the vehicleis
rai sed . R
Do not openor clo seadoo ror the trunk lid
wh en the vehicleis rai sed .
R Ma kesure that noper sons arepresent in
the vehiclewh en the vehicleis rai sed . X
Usi nglug wre nch 0043,loose nthe boltson
the wheel youwi sh tocha nge byabou tone
ful lturn. Donot unscrew theboltscom-
pl etel y. The
jacki ngpoints are locate djust behindthe
front wheel hou sing sand just infront ofthe
rea rwh eel hou sing s(a rrow s).
Vehi cles with AMG equipmen t:the vehicle
ha scove rsinsta lled topro tect thevehicle
bod ynext tothe jacki ngpoints onthe outer
sil ls. 29
0 Cha
ngingawh eelWhe elsand tires