2019 MERCEDES-BENZ CLA COUPE wheel

Observe
thelegal lyrequired minimum tiretread
depth (Ypage 291). Winter tirescanreduce the
braking distance onsnow-covered surfacesin
comparison withsummer tires.Thebraking dis-
tance isstill much further thanonsurfaces that
are not icyorcovered withsnow. Takeappro-
priate carewhen driving.
Further information onwinter tires(M+S tires)
(Y page 292).
Temper ature G
WARNING
The temperature gradeforthis tireisestab-
lished foratire that isproperly inflatedand
not overloaded .Exc essive speed, underinfla-
tion, orexcessive loading,either separately or
in combination, cancause excessive heat
buil d-up andpossible tirefailu re.
The temperature gradesareA(the highest), B,
and C,representing thetire's resistance tothe
generation ofheat anditsabil itytodissipa te
heat when tested undercontrolled conditions
on aspecified indoorlaboratorytestwheel. Sus-
tained hightemperature cancause thematerial
of the tire todegenerate andreduce tirelife, and
excessive temperature canlead tosudden tire
failu re.The grade Ccorresponds toalevel of
performance whichallpassenger cartires must
meet under theFederal MotorVehicle Safety
Standard No.109. Grades Band Arepresent
higher levelsofperformance onthe labora tory
test wheel thantheminimum requiredbylaw. Tire
labeli ng
Overview 0043
Uniform TireQuali tyGradi ngStandards
(Y page 309)
0044 Department ofTransportation, TireIdentifi-
cation Number (Ypage 308)
0087 Maximum loadrating (Ypage 307)
0085 Maximum tirepressures (Ypage 296)
0083 Manufacturer
0084 Tire material (Ypage 308)
006B Tire size designation, load-bearingcapacity
and speed rating(Ypage 305)
006C Load index (Ypage 307)
006D Tire name
The markings described aboveareonthe tire in
addition tothe tire name (sales designation) and
the manufacturer's name.
i Tire
data isvehicle-specific andmay deviate
from thedata inthe example.
Tire size designation, load-bearing
capacity andspeed rating G
WARNING
Exc eeding thestated tireload-bea ringcapa-
city and theapproved maximum speedcould
lead totire damage orthe tire bursting. There
is arisk ofaccident.
Therefore, onlyusetiretypes andsizes
approved foryour vehicle model.Observe the All
about wheelsand tires
305Wheels andtires
Z

tire
load rating andspee dra ting required for
yo ur 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 impri nted inthe tire wallma y
not conta inany letters orma yconta inone letter
tha tpre 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 trucktire sacc ording toU.S. manuf actu ring
sta nda 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 r-
ge ncy .
Tire width: tirewidth 0043sho wsthe nomi naltire
wi dth inmi llim ete rs.
As pec tratio :as pe ct ratio 0044 isthe size ratio
be twe enthe tire height and tirewidth and is
sho wninpe rcen t.The aspe ctratio iscal cul ate d
by divid ing the tire width bythe tire height.
Tire code: tire code0087 speci fiesthe tire type.
"R "rep resents radial tire s;"D" represents diag -
ona ltire s;"B" represents diag ona lra dial tire s.
Op tional ly,tire swi th ama xim um spee dof ove r
149 mph (240 km/h )ma yha ve "ZR" inthe size de
scri ption, dependi ng on the manuf actu rer
(e .g. 245/4 0ZR 18) .
Rim diamete r:rim diam ete r0085 isthe diam ete r
of the bead seat, not thediam ete rof the rim
fla nge .Th erim diam ete ris sp eci fiedin
inch es(in).
Lo ad-b earingin dex :lo ad -be aring index0083 isa
num erical cod etha tsp eci fiesthe maxim um
lo ad -be aring capacityof atire .
Do not overload the tiresby exce eding the
sp eci fiedload limi t.Th ema xim um permi ssible
lo ad can befou ndonthe vehicle'sTire and
Loa ding Info rma tionplaca rdon the B-pi llar on
the driver 'sside (Ypage 301) .
Exam ple:
Loa d-bearin gind ex91 indicates ama xim um
lo ad of1,3 56lb(61 5kg )tha tthe tirescan bear.
For furthe rinf orm ation onthe maxim um tire
lo ad inkilog rams and lbs, see(Y page 307 ).
For furthe rinf orm ation onthe load bearing
ind ex, see"L oa dind ex" (Ypage 307 ).
Spe edratin g:spee dra ting 0084speci fiesthe
ap pro ved maxim um spee dof the tire.
i Ti
re dataisveh icle-s pecificand mayde via te
fro mthe data inthe exampl e.
Re gardl essof the spee dra ting ,al wa ysobserve
the spee dlimi ts. Drivecar efully and adaptyo ur
dri vin gsty leto the trafficcond itions .
Summe rtire s In
dex Spe
edratin g Q up
to100 mph (160km/h ) R up
to106 mph (170km/h ) S up
to112 mph (180km/h ) T up
to118 mph (190km/h ) H up
to130 mph (210km/h ) V up
to149 mph (240km/h ) W up
to168 mph (270km/h ) Y up
to186 mph (300km/h ) ZR
...Y up
to186 mph (300km/h ) ZR
...(. .Y) ove
r186 mph (300 km/h ) ZR ove
r149 mph (240 km/h ) R
Op tional ly,tire swi th ama xim um spee dof
ove r149 mph (240km/h )ma yha ve "ZR" in 30
6 Al
labo utwhee lsan dtire sWhe elsand tires

the
size descri ption, dependi ng on the man-
uf actu rer(e.g. 245/4 0ZR 18 ).
The servi ce speci ficati on isma de up ofload -
be aring index0083 and spee dra ting 0084.
R Ifthe size descri ption ofyour tire includes
"Z R" and thereareno servi ce speci ficati ons ,
as kthe tire manuf actu rerinord erto findou t
the maxim um spee d.
If ase rvi ce speci ficati on isav ailabl e, the max-
im um spee dis limi ted according tothe spee d
ra ting inthe servi ce speci ficati on. Exam ple:
245/4 0ZR 18 97Y.Inthis example ,"97 Y"is
the service specifica tion.Theletter "Y"rep-
resents thespeed rating. Themaximum
speed ofthe tire islimi ted to186 mph
(300 km/h).
R The size descriptio nfor alltires withmaxi-
mum speed sof over 186mph (300 km/h)
must include "ZR"and theservice specifica -
tion must begiven inparentheses .Example:
275/40 ZR18 (99 Y).Speed rating"(Y)"indi-
cates thatthemaximum speedofthe tire is
over 186mph (300 km/h ).Ask thetire man-
ufacturer aboutthe maximum speed.
All -weather tiresandwintertires 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) i
Not
alltires withtheM+S marking provide
the driving characteristics ofwinter tires.In
addi tion tothe M+S marking, wintertiresalso
have the004D snowfla kesymbo lon the tire
wal l.Tires withthismarking fulfillthe requi re-
ments ofthe Rub ber Manufa cturers Associa-
tion (RMA) andtheRub ber Association of
Cana da(RAC) regard ingthe tire traction on
snow. Theyhave been especia llydevel oped
for driving onsnow.
An electronic speedlimiterprevents yourvehi-
cle from exceeding aspeed of130 mph
(210 km/h).
The speed ratingoftires mounted atthe factory
may behigher thanthemaximum speedthatthe
electronic speedlimiterpermits. Make
surethatyourtires have therequi red
speed rating, e.g.when buying new tires. The
requi redspeed ratingforyou rvehicle canbe
found inthe "Tires" section (Ypage 315).
Further information aboutreadi ngtire data can
be obtained fromanyqualifiedspecia listwork-
shop.
Load index In
addi tion tothe load -bearing index,load
index 0043may beimprinted aftertheletters that
identify speedratingonthe sidew allofthe tire.
Speed rating(Ypage 305).
R Ifno specifica tionisgiven: notext (asinthe
example above),represents astandard load
(SL) tire
R XL orExtr aLoad: represents areinforced tire
R Light Load: represents aligh tload tire
R C, D, E:represents aload range thatdepends
on the maximum loadthatthetire can carry at
a certain pressure
i Tire
data isvehicle -specific andmay devia te
from thedata inthe example .
Maximum loadrating 1
Or M+S 004D forwinter tires. Al
labout wheelsand tires
307Wheelsand tires Z

Maximum
tireload 0043isthe maximum permis-
sible weight forwhich thetire isapproved.
Do not overload thetires byexceeding the
specified loadlimit. Themaximum permissible
load canbefound onthe vehicle's Tireand
Loading Informationplacard onthe B-pillar on
the driver's side(Ypage 301).
i The
actual values fortires arevehicle-spe-
cific andmay deviate fromthevalues inthe
illu stration.
DOT, TireIdentification Number(TIN) US
tire regulations stipulatethatevery tireman-
ufacturer orretreader mustimprint aTIN inor on
the sidewa llof each tireproduced. The
TINisaunique identification number.The
TIN enables thetire manufacturers orretreaders
to inform purchasers ofrecalls andother safety-
relevant matters. Itmakes itpossible forthe
purchaser toeasily identify theaffected tires.
The TINismade upofmanufacturer identifica-
tion code 0044,tire size 0087,tire type code 0085and
manufacturing date0083.
DOT (Departm entofTra nsporta tion):tire
symbol 0043marks thatthetire complies withthe
requirements ofthe U.S. Departmen tof Trans-
portation.
Manufact ureridentification code:manufac-
turer identification code0044provides detailson
the tire manufacturer. Newtireshave acode
with twosymbols. Retreaded tireshave acode
with foursymbols.
For further information aboutretreaded tires,
see (Ypage 315).
Tire size: identifier 0087describes thetire size.
Tire type code: tiretype code 0085can beused by
the manufacturer asacode todescribe specific
characterist icsofthe tire. Date
ofmanufa cture:dateofmanufacture 0083
provides information abouttheage ofatire. The
first andsecond positions represent theweek of
manufacture, startingwith "01" forthe first cal-
endar week. Positions threeandfour represent
the year ofmanufacture. Forexample, atire that
is marked with"3208", wasmanufactured in
week 32in2008.
i Tire
data isvehicle-specific andmay deviate
from thedata inthe example.
Tire character istics This
information describesthetype oftire cord
and thenumber oflaye rsinsidewa ll0043 and
under tiretread 0044.
i Tire
data isvehicle-specific andmay deviate
from thedata inthe example.
Defini tionofterm sfor tires andloading Tire
plycomposition andmaterial used
Describes thenumber ofplies orthe number of
laye rsof rubber-coated fabricinthe tire tread
and sidewa ll.These aremade ofsteel, nylon,
polyester andother materials.
Bar
Metric unitfortire pressure. 14.5038pounds
per square inch(psi) and100 kilopascals (kPa)
are the equival entof1bar.
DOT (Departm entofTra nsporta tion)
DOT-m arkedtiresfulfill therequirements ofthe
U SDepartmen tof Transportation .
Norm aloccupant weight
The number ofoccupants forwhich thevehicle
is designed multiplied by68 kilograms (150lbs). 308
All
about wheelsand tiresWheels andtires

Uniform
TireQualit yGra ding Standar ds
A unifor mstan dard tograde thequality oftires
with regards totread quality, tiretraction and
tempe rature charac teristics.The quality grad-
ing assessmen tis made bythe manufac turer
following specificationsfrom theU.S.govern -
ment .The ratin gsare molded intothe sidewall of
the tire.
Recomm endedtirepr essures
The recom mended tirepressure appliestothe
tires mount edatthe factory.
The Tire andLoading Informat ionplacard con-
tains therecom mended tirepressures forcold
tires onafully loaded vehicle andforthe maxi-
mum permissible vehiclespeed.
The tirepressure tablecontains therecom men-
ded pressures forcold tires forvarious operat-
ing con dition s,i.e. differin gload andspeed con-
dition s.
Increased vehicleweightduetooptiona l
equip ment
The combin edweight ofall stan dard and
option alequipment availableforthe vehicle,
regardless ofwhether itis actually installed on
the vehicle ornot .
Rim
This isthe part ofthe wheel onwhich thetire is
mount ed.
GAWR (Gross AxleWeight Rating)
The GAWR isthe maximum grossaxleweight
ratin g.The actual loadonanaxle must never
exc eed thegross axleweight rating.The gross
axle weight ratingcan befound onthe vehicle
ident ificationplate onthe B-pillar onthe driver' s
side.
Speed rating
The speed ratingis part ofthe tire ident ification.
It specifies thespeed rangeforwhich thetire is
approved.
GVW (Gross Vehicle Weight)
The gross vehicle weightincludes theweight of
the vehicle includin gfuel, tools, thespare wheel,
access oriesinstalled, occupants, luggage and
the drawbar noseweight ,if applicable. Thegross
vehicle weightmustnotexceed thegross vehi-
cle weight ratingGVWR asspecified onthe vehi-
cle ident ificationplate onthe B-pillar onthe
driver' sside. GVW
R(Gross Vehicle WeightRating)
The GVWR isthe maximum permissible gross
weight ofafully loaded vehicle (theweight ofthe
vehicle includin gall acces sories, occupants,
fuel, luggage andthedrawbar noseweight ,if
applicable). Thegross vehicle weightratingis
specified onthe vehicle identificationplate on
the B-pillar onthe driver' sside.
Maxim umloaded vehicle weight
The maximum weightisthe sum of:
R the curb weight ofthe vehicle
R the weight ofthe acces sories
R the load limit
R the weight ofthe factoryinstalled option al
equipment
Kilopascal (kPa)
Metr icunit fortire pressure. 6.9kPa corre-
sponds to1psi. Another unitfortire pressure is
bar. 100 kilopasc als(kPa) arethe equivalent of
1 bar.
Load index
In addition tothe load-bearin gindex ,the load
index mayalsobeimprin tedonthe sidewall of
the tire. This specifies theload-bearin gcapacit y
more precise ly.
Curb weight
The weight ofavehicle withstandard equipment
includin gthe maximum capacityof fuel, oiland
coolant .It also includes theair-c ondit ioningsys-
tem andoption alequipment ifthese areinstal-
led inthe vehicle, butdoes notinclude passen-
gers orluggage.
Maxim umload rating
The maximum tireload isthe maximum permis-
sible weight inkilogram sor lbs forwhich atire is
approved.
Maxim umperm issible tirepr essure
Maximum permissible tirepressure forone tire.
Maxim umload onone tire
Maximum loadonone tire. This iscalculated by
dividing themaximum axleload ofone axle by
two. All
about wheels andtires
309Wheels andtires Z

PSI
(pounds persquar einch)
A standard unitofmeasure fortire pressure.
Aspect ratio
Relationship betweentireheight andtirewidth
in percent .
Tire pressur e
This ispressure insidethetire apply inganout-
ward force toeach square inchofthe tire's sur-
face. Thetirepressure isspecified inpounds per
square inch(psi), inkilopascal (kPa)orinbar.
The tirepressure shouldonlybecorrect edwhen
the tires arecold.
Cold tirepressur e
The tires arecold:
R ifthe vehicle hasbeen parked withthetires
out ofdirect sunlight foratleast three hours
and
R ifthe vehicle hasnotbeen driven further than
1 mile (1.6km)
Tread
The part ofthe tire that comes intocont actwith
the road.
Bead The tirebead ensures thatthetire sits securely
on the wheel. Thereareseveral steelwires inthe
bead toprevent thetire from coming loosefrom
the wheel rim.
Sidewall The part ofthe tire between thetread andthe
bead.
Weight ofoptional extras
The combined weightofthose optional extras
that weigh morethanthereplaced standard
parts andmore than2.3kg(5lbs). These
optional extras,such ashigh-performanc e
brakes, levelcontrol,aroof rack orahigh-per-
formanc ebattery, arenot included inthe curb
weight andtheweight ofthe accessories.
TIN (Tire Identification Number)
This isaunique identifier whichcanbeused by
a tire manufacturer toidentify tires,forexample
for aproduct recall,andthus identify thepur-
chasers. TheTINismade upofthe manufactur-
er's identity code,tiresize, tiretype code and
the manufacturing date. Load
bearing index
The load bearing index(alsoloadindex) isacode
that contains themaximum loadbearing capa-
city ofatire.
Tra ction
Traction isthe result offrict ionbetween thetires
and theroad surface.
Tread wearindicators
Narrow bars(tread wearbars) thataredistrib-
uted overthetire tread. Ifthe tire tread islevel
with thebars, thewear limitof00CD in(1.6 mm)
has been reached.
Occupant distribution
The distribution ofoccupants inavehicle attheir
designated seatingpositions.
Total loadlimit
Nominal loadandluggage loadplus68kg
(15 0lbs )multiplied bythe number ofseats in
the vehicle. Changing
awheel Flat
tire
The "Breakdown assistance"section
(Y page 274)contains information andnotes on
how todeal with aflat tire. Inform ationondriv-
ing with MOExt ended tiresinthe event ofaflat
tire can befound under "MOExt endedtires(tires
with run-flat characterist ics"(Ypage 275). Rotat
ingthe wheels G
WARNING
Int erchanging thefront andrear wheels may
severely impairthedriving characterist icsif
the wheels ortires have different dimensions.
The wheel brakes orsuspension components
may alsobedamaged. Thereisarisk ofacci-
dent.
Rotate frontandrear wheels onlyifthe wheels
and tires areofthe same dimensions.
! On
vehicles equippedwith atire pressure
monitor ,electron iccomponen tsare located
in the wheel. 310
Changing
awheelWheels andtires

Tire-mount
ingtools should notbeused near
the valve. Thiscould damage theelectron ic
compon ents.
Only have tireschanged ataqualified spe-
cialist workshop.
Observe theinstr uctions andsafety notesinthe
"Changing awheel" section (Ypage 310).
The wear pattern son the front andrear tires
differ, depending onthe operating conditions.
Rotate thewheels beforeaclear wearpattern
has formed onthe tires. Fronttires typically
wear more onthe shoulders andtherear tires in
the cent er.
On vehicles thathave thesame sizefront and
rear wheels, youcan rotat ethe wheels accord-
ing tothe inter valsinthe tire manufact urer's
warranty bookinyour vehicle document s.Ifno
warranty bookisavailabl e,the tires should be
rotat edevery 3,000 to6,000 miles(5,000 to
10,00 0km ).Dependin gon tire wear, thismay
be required earlier.Donot change thedirection
of wheel rotation.
Clean thecont actsurfaces ofthe wheel andthe
brake discthoroughly everytimeawheel isrota-
ted. Check thetire pressure and,ifnecessary,
restart thetire pressure losswarning system
(Canada only)orthe tire pressure monitor(USA
only). Direction
ofrota tion
Tires withaspecified directionofrotat ionhave
additional benefits,e.g. ifthere isarisk ofhydro-
planing. Theseadvantages canonly begained if
the tires areinstalled correspon dingtothe
direction ofrotat ion.
An arrow onthe sidewall ofthe tire indicates its
correc tdirection ofrotat ion. Storing
wheels
Stor ewheels thatarenot being usedinacool,
dry and preferably darkplace. Protectthe tires
from oil,grease, gasoline anddiesel. Mounting
awheel
Prepa ringthevehicle X
Stop thevehicle onsolid, non-slippery and
level ground.
X Apply theelectric parking brakemanually.
X Bring thefront wheels intothestraight- ahead
position.
X Shift thetrans mission toposition 005D.
X Switch offthe engine.
X Vehicles withoutKEYLESS-GO: removethe
Smart Keyfrom theignition lock.
X Vehicles
withKEYL ESS-GO start-function
or KEYL ESS-GO: openthedriver's door.
The vehicle electron icsare now inposition
0092. This isthe same as“key removed”.
X Vehicles
withKEYL ESS-GO start-function
or KEYL ESS-GO: removetheStart /Stopbut-
ton from theignition lock(Ypage 123).
X Make surethattheengine cannotbe start ed
via your smartphon e(Y page 83).
X Ifincluded inthe vehicle equipment, remove
the tire- change toolkitfrom thevehicle.
X Safeguard thevehicle against rollingaway
(Y page 142).
i Apart
fromcertaincount ry-specific varia-
tions, thevehicles arenot equipped witha
tire- change toolkit.Some toolsforchanging a
wheel arespecific tothe vehicle. Formore
inform ationonwhich toolsarerequired to
perform awheel change onyour vehicle, con-
sult aqualified specialist workshop.
Necessary tire-changing toolscaninclude, for
example:
R Jack
R Wheel chock
R Lug wrench Changing
awheel
311Wheels andtires Z

Securing
thevehicle toprevent itfrom
rolling away If
your vehicle isequippe dwith awheel chock,it
can befound inthe tire-c hange toolkit
(Y page 274).
The folding wheelchock isan additional safety
measure toprevent thevehicle fromrolling
away ,for example whenchanging awheel.
X Fold both plates up0043.
X Fold outlower plate0044.
X Guide thelugs onthe lower platefullyintothe
openings inbase plate 0087. X
Place chocksor other suitable itemsunder
the front andrear ofthe wheel thatisdiago-
nally opposite thewheel youwish tochange.
Raising thevehicle G
WARNING
If you donot position thejack correct lyat the
appropriate jackingpoint ofthe vehicle, the
jack could tipover withthevehicle raised.
There isarisk ofinjury.
Only position thejack atthe appropriate jack-
ing point ofthe vehicle. Thebase ofthe jack must
bepositioned vertically,directlyunder
the jackin gpoint ofthe vehicle.
! Only
position thejack atthe appropriate
jackin gpoint ofthe vehicle. Otherwise, you
could damage thevehicle.
Observe thefollow ingwhen raising thevehi-
cle:
R To raise thevehicle, onlyusethevehicle-spe-
cific jack thathasbeen tested andapproved
by Mercedes-B enz.Ifused incorrec tly,the
jack could tipover withthevehicle raised.
R The jack isdesigned onlytoraise andhold the
vehicle forashort timewhile awheel isbeing
changed. Itmust notbeused forperforming
maintenan cework under thevehicle.
R Avoid changing thewheel onuphill anddown-
hill slopes.
R Before raising thevehicle, secureitfrom roll-
ing away byapply ingthe parking brakeand
insertin gwheel chocks.Do not disengage the
parking brakewhilethevehicle israised.
R The jack must beplaced onafirm, flatand
non- slipsurface. Onaloose surface, alarge,
flat, load-bearing underlaymustbeused. Ona
slippery surface, anon- slipunderlay mustbe
used, e.g.rubber mats.
R Do not use wooden blocksorsimilar objects
as ajack underlay. Otherwise, thejack willnot
be able toachieve itsload-bearing capacity
due tothe restrict edheight.
R Make surethatthedistance between the
underside ofthe tires andtheground doesnot
exceed 1.2in(3 cm).
R Never placeyourhands andfeet under the
raised vehicle.
R Do not lieunder thevehicle.
R Do not start theengine whenthevehicle is
raised.
R Do not open orclose adoor orthe trunk lid
when thevehicle israised.
R Make surethatnopersons arepresent inthe
vehicle whenthevehicle israised. 312
Changing
awheelWheels andtires