2021 MERCEDES-BENZ CLA COUPE wheel

Be
sureto also payatt ent ion tothefo llo wing
re lat ed topic:
R Noteson tirepr essur e(/ page290) Ti
re pres sur elo ss wa rning system Fu
nction ofthetir epr essur eloss warning
sy stem
The tirepr essur eloss warning system warnsth e
dr iver by means ofdisp lay messa geswhen ther e
is ase vere tirepr es su re loss.
Sy stem limit s
The system maybe impair edorma yno tfunc tion
par ticular lyin thefo llo wing situat ions:
R Incorrectly settir epr ess ure
R Sud den press urelos scau sed,fo rex am ple,
by afo re ign obje ctpene tratin gth etir e
R Steady pressur eloss inseveraltir es
The system has are strict ed ordel aye dfunc tion
par ticular lyin thefo llo wing situat ions:
R Poor ground condit ions,e.g.snowor gra vel
R Driving with sno wch ains R
When adoptingave ry spor tydriving style
wit hhigh corner ing speeds orsudden accel‐
er ation
R Drivin gwit hahigh load
The tirepr essur eloss warning system isonl yan
aid. Itis thedr iver's responsibili tyto setth etir e
pr essur eto there comme ndedcoldtirepr ess ure
su itab leforth eoper ating situation andtocheck
it.
Be sureto also obse rveth efo llo wing further
re lat ed subje cts:
R Noteson tirepr essur e(/ page290)
R Displa ymessag esabout thetir es
(/ page37 4)
Re star ting thetir epr essur eloss warning
sy stem
Re quirement s:
R The recomme ndedtirepr ess ureis cor rectl y
se tfo rth ere spectiv eoper ating status onall
wheels . Re
star tth etir epr essur eloss warning system in
th efo llo wing situat ions:
R The tirepr essur ehas chang ed.
R The wheels ortires have been chang edor
ne wlyins talled.
On- boar dcom puter:
4 Service 5
Tires #
Swipe down wardson Touc hCon trol on the
lef t-hand sideofthesteer ing wheel.
The Tire Pressure ControlSystem Active
Restart messageis sho wninthemultifunc ‐
tion displa y. #
Tobegin restar t,pr ess Touc hCon trol on the
lef t-hand sideofthesteer ing wheel.
The Tire Pressure NowOK?messag eis
sho wninthemultifunc tiondispla y. #
Select Yes. #
Toconf irm restar t,pr ess Touc hCon trol on
th elef t-hand sideofthesteer ing wheel.
The Run FlatIndic atorRestart edmessag eis
sho wninthemultifunc tiondispla y. 296
Wheels andtires

Af
teryo uha ve driven fora fe w min utes, the
tir epr es su re loss warning system monit ors
th ese ttir epr essur eof all thetir es.
Be sureto also payatt ent ion tothefo llo wing
re lat ed topic:
R Noteson tirepr essur e(/ page290) Loading
theve hicl e No
teson Tire and Loading Information plac‐
ar d &
WARNIN GRisk ofacci dent from overloa‐
ded tires
Ov erloaded tires ma yove rheat and burstas a
con sequenc e.Ov erloaded tires can also
im pair thesteer ing and handling charact eris‐
tic sand lead tobrak efa ilur e. #
Obser vetheload rating ofthetir es. #
The load rating mustbe atleas thalf the
per missible axleload oftheve hicle. #
Neverove rload thetir es by exc eeding
th emaximum load. The
Tire and Loadi ngInfo rm atio nplacar dis on
th eB-pillar onthedr iver's side oftheve hicle. 1
Tire and Loadi ngInfo rm atio nplacar d %
The datasho wnintheillus tration isexam ple
dat a.
The Tire and Loadi ngInfo rm atio nplacar dsho ws
th efo llo wing informatio n:
R Maxim umnumb erofseats 2according to
th emaximum numberofpeople permitt edto
tr av el in theve hicle. Wheels
andtires 29
7

R
Maximum permissible load3com prises the
gr os swe ight ofall vehicle occupants, load
and luggage.
R Recomme ndedtirepr ess ure 1forcold
tir es. The recomme ndedtirepr ess ures are
va lid forth emaximum permissible loadand
up tothemaximum permissible vehicle
speed.
Please alsonote:
R Information onper missib lewe ight sand loads
on theve hicle identif ication plate
(/ page323).
R Information ontirepr essur ein thetir epr es‐
sur eta ble (/ page292).
Fu rther relat ed subje cts:
R Determ inin gth emaximum permissible load
(/ page298)
R Noteson tirepr essur e(/ page290). Ste
psforDe term ining Correct Load Limit The
follo wing steps have been developed as
re qu ired ofall manuf acturersunder Title 49, Co
de ofU.S. Feder alRe gulations, Part57 5, pur‐
sua nttothe"N ational Traf fic and MotorVe hicle
Saf etyAc tof 1966". #
(1):Locat eth est at emen t“T he combined
we ight ofocc upant sand cargoshould never
exc eed XXX kgorXXX lbs.”on your vehicle's
placar d. #
(2): Determ ine thecombin edweight ofthe
dr iver and passeng ersth at will beriding in
yo ur vehicle. #
(3): Subtr actthecombin edweight ofthe
dr iver and passeng ersfrom XXX kgor
XXX lbs. #
(4): The resulting figur eeq uals theav ailable
amoun tof car goand luggageload capac ity.
Fo rex am ple, ifth e"XXX" amount equals
1, 400 lbs.and ther ewill befive 150lb pas ‐
seng ersin your vehicle, theamount ofavaila‐
ble cargoand luggageload capac ityis
65 0lbs. (1,40 0-75 0(5 x15 0) =650 lbs.) #
(5):De term ine thecombin edweight oflug‐
ga ge and cargobein gloaded ontheve hicle.
That weight mayno tsaf elyexc eed theav aila‐ ble
cargoand luggageload capac itycalc ula‐
te din Step 4. #
(6): Ifyo ur vehicle willbetowing atrailer ,
load from your trailer willbetrans ferred to
yo ur vehicle. Consult this manual todeter‐
mine howthis reduces theav ailable cargo
and luggageload capac ityofyour vehicle.
% Notall vehicles areper mitt edtotow a
trailer .To wing atrailer isonl yper mittedifa
tra iler -hit chisins talled. Please consult an
aut hor ized Mercedes -Benz dealer ifyo uha ve
an yqu estion sabout towing atrailer with
yo ur vehicle.
Ev en ifyo uha ve cal cul ated thetot alload care‐
full y,yo usho uld still mak esur eth at themaxi‐
mum permissible gross weight andthemaxi‐
mum gross axle weight rating ofyour vehicle are
no texc eeded. Details can befound ontheve hi‐
cle identif ication plate. 298
Wheels andtires

#
Have your loaded vehicle –including driver ,
occupants andload –we ighed onave hicle
we ighbr idge.
The measur edvalues mayno texc eed the
maximu mper missi blevalues stat ed on the
ve hicle identif ication plate.
Fu rther relat ed subje cts:
R Calculation exam ple forde term inin gth emax‐
imum load(/page299) R
Tire and Loadi ngInfo rm atio nplacar d
(/ page29 7)
R Tire pressur eta ble (/ page292)
R Vehicle identif ication plate(/ page323) Calculation
exam ple forde term ining the
ma ximum load The
follo wing table showsexam ples ofhowto
cal cul atetot aland load capac ities wit hva rying seatin
gcon figur ations anddiffere nt num bers
and sizes ofocc upant s.The follo wing exam ples
use amax imum loadof1500 lbs (680 kg).This
is forillus tratio npur pos esonly.Mak esur e
yo uar eusin gth eactual loadlimit foryo ur vehi‐
cle stat ed on your vehicle's Tire and Loadi ng
In fo rm atio nplacar d(/ page29 7).
The high erthewe ight ofall theoccupant s,the
smaller themaximum loadforlug gage .
Ste p1 Ex
am ple 1E xamp le2
Combine dmaxim umweight ofocc upant sand
load (datafrom theTire and Loadi ngInfo rm atio n
placar d) 15
00 lbs (680 kg)1 500lbs(680 kg) Wheels
andtires 299

Ste
p2 Ex
am ple 1E xamp le2
Nu mb erofpeople intheve hicle (driver and
occupants) 51
Dis trib uti on oftheoccupant sF ront:2
Re ar:3 Fr
ont :1
We ight ofocc upant sO ccupant1:150lbs (68 kg)
Occupant 2:180lbs (82 kg)
Occupant 3:160lbs (73 kg )
Occupant 4:140lbs (63 kg)
Occupant 5:120lbs (54kg ) Occupant
1:200 lbs(91 kg )
To talwe ight ofall occ upant s7 50lbs (340 kg)2 00lbs (91 kg ) Ste
p3 Ex
am ple 1E xamp le2
Pe rm issible load(maxim umgros sve hicle weight
ra ting from theTire and Loadi ngInfo rm atio n
placar dmin usthegr oss weight ofall occ upant s)15
00 lbs (680 kg)00F8 75 0lbs (340 kg)= 75 0lbs
(340 kg) 15
00 lbs (680 kg)00F8 200 lbs(91 kg )= 13 00 lbs
(589 kg) 300
Wheels andtires

as
wellon thego vernment courseasatir egr a‐
ded 100.
The relativ eper form anc eof tires depen dsupon
th eactual conditions oftheir use, howe ver,and
ma ydepar tsign ifican tly from thenor mdue to
va riatio nsindrivin ghabit s,ser vicepr act icesand
dif fere nces inroad charact eristic sand climate
con dition s.
Tr actio ngr ade &
DANG ER Risk ofacc iden tdue toinade‐
qu atetract ion
The tract ion grade assig nedtothis tireis
based onstra ight -ahead brakin gtract ion
te sts. #
Alw aysadap tyo ur drivin gst yle and
dr ive at aspeed tosuit thepr ev ailin g
traf fic and weather condition s. *
NO
TEDama getothedr ivet ra in from
wheelspin #
Avoid wheelspin. The
traction grades, from highes tto lowe st,ar e
AA ,A, Band C.Tho segrad es repr esent thetir e's
ability tostop onwetpa vement asmeasu red
unde rco ntro lled condition son spec ified govern‐
ment test sur faces ofasp haltand concr ete. A
tir emar kedC ma yha ve poor traction perform ‐
anc e.
Te mp eratur egr ade &
WARNIN GRisk ofacci dent from tire
ove rheating andtirefa ilur e
Ex cess ive speed, underinflation ,or exc essiv e
loading, either separ atelyor incombin ation,
can cause excessiv eheat build-up andpossi‐
ble tirefa ilur e. #
Obser vethere comme ndedtirepr es‐
su re. #
Regular lych eckth epr essur eof all the
tir es . #
Adjus tth etir epr essur e,ifneces sary. The
temp eratur egr ades areA (the highes t),B
and C,repr esent ingthetir e's resis tance tothe
ge ner ation ofhea tand itsability todissipat e heat
when tested under controlled conditions on
a specif iedindoor laborator yte st wheel. Sus‐
ta ined hightemp eratur ecan cause themat erial
of thetir eto deg ener ateand reduce tirelife, and
exc essiv ete mp eratur ecan lead tosudden tire
fa ilur e.The grade Ccor responds toaleve lof
per form anc ewhic hall passe nger car tires mus t
mee tunde rth eFe der alMo torSaf etySt andar d
No .10 9. Grade sB and Arepr esent higher leve ls
of per form anc eon thelabor ator yte st wheel
th an theminimum requ ired bylaw. DO
T,Tire Iden tificat ionNumbe r(TI N) US
tirere gulations stipulat eth at eve rytire man‐
uf actu reror retrea de rmu stimprint aTIN inor
on theside wallof eac htir epr oduced. 302
Wheels andtires

Ne
verexc eed maximum tirepr essur e1 speci‐
fi ed forth etir e. Alw aysobser vethere comme n‐
ded tirepr ess urefo ryo ur vehicle when adjusting
th etir epr essur e(/ page292). Inf
ormat ionontirech aract eristics %
The datasho wnintheimag eis exam ple
dat a.
This informat iondesc ribes thetype oftirecor d
and thenumber oflaye rs inside wall1 and
under tiretread 2. Ti
re size designation, load-bearingcapacity ,
speed ratin gand load inde x &
WARNIN GRisk ofinju rythro ugh exceed‐
ing thespecif iedtireload-bear ingcapa‐
city ortheper missible speedrating
Ex cee ding thespecif iedtireload rating or
th eper missible speedrating mayle ad totire
da ma geand tothetir es bur sting. #
Ther efor e, onl yuse tiretypes andsizes
appr ovedfo ryo ur vehicle model. #
Obser vethetir eload rating andspee d
ra ting requ ired foryo ur vehicle. 1
Firstletter(s)
2 Nomin altirewidt hin millime ters
3 Aspe ctratio in%
4 Tire code
5 Rim diame ter
6 Load-be aring inde x
7 Speed rating
8 Loadind ex
% The datasho wnintheillus tration isexam ple
dat a.
In fo rm atio nabout readin gtir edat acan be
obt aine dfrom anyqu alif ied spec ialistwo rkshop. 30
4
Wheels andtires

Fi
rs tle tter( s)1 1:
R Without :passeng ervehicle tires accor dingto
Eur opeanma nuf actu ring standar ds.
R "P": passe nger vehicle tires accor dingtoUS
manuf acturingstandar ds.
R "LT": light truc ktir es acc ordin gto US manu‐
fa ctur ingstandar ds.
R "T": com pact emer gency sparewheels with
high tirepr essur eth at areon lydesigned for
te mp orar yuse inan emer gency .
As pec tra tio 3 3:
Ra tio betwee ntir ehe ight and tirewidthin pe r‐
cent (tire height divided bytirewi dth).
Tir eco de 4 4
(tire type ):
R "R"ra dial tire
R "D": bias plytire
R "B": bias beltedtires
R "ZR": radial tirewit hamaximum speedabove
14 9mp h(2 40 km/h) (optional) Rim
diame ter5 5:
The diam eter ofthebead seat(notth ediame ter
of therim flang e).The rim dia me teris specif ied
in inc hes (in).
Load-be aring inde x6 6:
Numer icalcode that spec ifies themaximum
load-bear ingcapacity ofatir e(e.g. "91" cor re‐
sponds to1356 lbs (615 kg)).
The load-bear ingcapacity ofthetir emus tbe at
leas thalf thegr oss axle weight rating ofyour
ve hicle. Donotove rload thetir es by exc eeding
th especif iedload limit.
See also:
R Maximum permissible loadontheTire and
Loadi ngInfo rm atio nplacar d(/ page29 7)
R Max imum tireload (/page30 3)
R Load index
Speed ratin g7 7:
Spe cifiesth eappr oved maximum speedofthe
tir e. %
Anelectr onicsp ee dlimi terpr eve nts your
ve hicle from exceeding aspeed of130mp h
(2 10 km/h) .
Ma kesur eth at your tires have there qu ired
speed rating .Yo ucan obtain informat iononthe
re qu ired speed rating from anauthor ized
Mer cedes-B enzCent er.
Summ ertires Inde
xS peedra tin g
Qu pto 100mp h(1 60 km/h)
Ru pto 106mp h(170 km/h)
Su pto 112mp h(1 80 km/h)
Tu pto 118mp h(1 90 km/h)
Hu pto 130mp h(210 km/h)
Vu pto 149mp h(2 40 km/h)
Wu pto 168mp h(2 70 km/h)
Yu pto 186mp h(3 00 km/h) Whee
lsand tires 305