2021 MERCEDES-BENZ GT 4-DOOR COUPE wheel size

Chec
kingtirepr essu resmanu ally #
Read thetir epr essur efo rth ecur rent operat‐
ing cond itions from theTire and Loadi ng
In fo rm atio nplacar dor thetir epr essur e
ta ble. Obser vetheno teson tirepr essur e. #
Remo vetheva lve cap ofthetir eto be
ch ecked. #
Press thetir epr essur ega ug esec urelyon to
th eva lve. #
Read thetir epr essur e. #
Ifth etir epr essur eis lowe rth an there com‐
mend edvalue, increase thetir epr essur eto
th ere comme ndedvalue. #
Ifth etir epr essur eis higher than there com‐
mend edvalue, release air.To do so, press
do wn theme talpin intheva lve, e.g. using
th etip ofapen, forex am ple. Then checkth e
tir epr es su re again usin gth etir epr essur e
ga ug e. #
Screw theva lve cap ontoth eva lve.
Fu rther relat ed subje cts:
R Noteson tirepr essur e(/ page30 7) R
Tire pressur eta ble (/ page309)
R Tire and Loadi ngInfo rm atio nplacar d
(/ page31 2) Ti
re pres sur emoni toring system Fu
nction ofthetir epr essur emoni toring sys‐
te m &
DANG ER Risk ofacc iden tdue toinc or‐
re ct tirepr ess ure
Eac htir e, incl uding thespar e(if prov ided),
should becheckedmont hlywhen coldand
th en inflated totheinf lation pressur ere com‐
mend edbytheve hicle manuf actureron the
ve hicle placar dor tireinf lation pressur e
label .(If your vehicle hastires ofadif fere nt
si ze than thesize indicat edon theve hicle
placar dor tireinf lation pressur elabel ,yo u
should determ ine thepr oper tireinf lation
pr essur efo rth ese tires.)
As anadded safetyfe atur e,your vehicle has
been equipped withatir epr essur emonit or‐
ing system (TPMS) that illumin ates alow tire pr
essur ete lltale when oneormor eof your
tir es issign ifican tly und erinf lated. Accor d‐
ing ly,if th elow tirepr essur ete lltale illumi‐
nat es, yousho uld stop and checkyo ur tires
as soo nas poss ible, andinflateth em tothe
pr oper pressur e.Driving onasignif icantly
und erinf lated tirecaus esthetir eto ove rheat
and canlead totire failur e.Und erinf lation
also reduces fuelefficie ncy and tiretrea d
li fe ,and mayaf fect theve hicle's handling
and stopping ability.Please note that the
TPMS isno ta subs titutefo rpr oper tiremain‐
te nance ,and itis thedr iver's responsibili ty
to maint aincorrect tirepr ess ure, evenif
und erinf latio nha sno tre ac hed theleve lto
tr ig ge rill umina tionoftheTPMS low tirepr es‐
sur ete lltale.
Yo ur vehicle hasalso been equipped witha
TPMS malfunction indicatortoindic atewhen
th esy stem isno toper ating proper ly.The
TPM Smal functi onindicatoris combined with
th elow tirepr essur ete lltale. When thesy s‐
te m detects amal functi on,theindicat or
lam pwill flash forapp roxima tely amin ute 31
0
Wheels andtires

Code
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. #
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(/page31 4)
R Tire and Loadi ngInfo rm atio nplacar d
(/ page31 2)
R Tire pressur eta ble (/ page309)
R Vehicle identif ication plate(/ page33 7) 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‐ 31
4
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(/ page309). 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. 320
Wheels andtires

th
ese areins talled ontheve hicle, butdoes not
include passeng ersor lugg age.
Maximum tireload: themaximum tireload is
th emaximum permissible weight inkilog rams or
lbs forwhi chatir eis appr oved.
Maxim umpermissible tirepr essur e:maxi‐
mum permissible tirepr essur efo rone tire.
Maximum loadonone tire: maximu mloa don
one tire. This iscalcu lated bydividing themaxi‐
mum axleload ofone axle bytwo.
PSI (pounds persquar ein ch ):standar dunit of
meas uremen tfo rtir epr essu re.
Aspe ctratio :ra tio betwee ntire height and tire
wi dthin pe rcent .
Ti re pres sur e:press ureinsi dethetir eappl ying
an outw ardfo rc eto eve rysquar einc hof thetir e.
The tirepr essur eis specif iedinpounds per
sq uar einc h(psi), inkilopascals (kPa)or inbar .
The tirepr essur eshould onlybe cor rected whe n
th etir es arecold.
Cold tirepr essur e:thetir es arecold when the
ve hicle hasbeen parkedfo rat lea st3hou rs wit
hout direct sunli ghtonthetir es ortheve hicle
has been driven forless than 1mile (1.6 km ).
Ti re contact surface: thepar tof thetir eth at
com esintocon tact with thero ad.
Ti re bead: thepur pose ofthetir ebead isto
ensur eth at thetir esits secur elyon thewheel
ri m. Ther ear ese veralwir ecor esinthetir ebead
to preve ntthetir efrom chang inglengthon the
wheel rim.
Side wall:thepar tof thetir ebe tween thetread
and thetir ebead.
We ight ofoptiona leq uipm ent:th ecombin ed
we ight oftheop tion aleq uipment weighin gmor e
th an there placed standar dpar tsand moreth an
5 lbs (2.3kg ).This optional equipment, suchas
high-per form anc ebr ak es, leve lcon trol system, a
ro of lugg agera ck orhigh-per form anc ebat teries,
is no tincluded inthecurb weight andthewe ight
of theaccessor ies.
TIN (Tire Identif ication Numbe r):auni que
ident ificat ion numb erwhic hcan beused bya
tir ema nuf actu rerto ident ifytires, forex am ple,
in apr oduc tre cal l,and thus iden tifyth epur‐
ch aser s.The TINismade upofthemanuf actur‐ er's
identit ycode, tiresize, tiretype code and
th emanuf acturingdate.
Load-bear inginde x:theload-bear inginde xis a
code that con tains themaximum load-bearing
capacity ofatir e.
Tr actio n:traction isthegr ip resulting from fric‐
tion between thetir es and thero ad sur face.
We arindi cator:nar row bars(tr ead wearbar s)
th at aredis tribut edove rth etir econ tact surface.
If th etir etread isleve lwit hth ebar s,thewe ar
limit of1/ 16 in(1.6 mm) hasbeen reac hed.
Dis tribut ionofvehicl eoc cupants: distribu tion
of vehicle occupants over designat edseat posi‐
tion sin ave hicle.
Maximum permissible payload weight :nom i‐
nal load andluggageload plus150lb (68 kg)
multip liedby thenumber ofseats intheve hicle. 32
4
Wheels andtires

Cha
nging awheel No
teson selecting, installing andreplac ing
tir es &
WARNIN GRisk ofacci dent dueto inc or‐
re ct dimensi onsofwhe elsand tires
If whe elsand tires ofthewr ong size are
ins talled, thewheel brak es orwheel suspen‐
sion componen tsma ybe damag ed. #
Alw aysre place wheels andtires wit h
th ose that fulf illthespecif ication sof
th eor iginal part.
When replacing wheels, makesur eto fit th e
cor rect:
R Desi gnati on
R Mod el
Whe nre placing tires, mak esur eto ins tallth e
cor rect:
R Desi gnati on
R Manuf actu rer
R Model &
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. *
NO
TEVehicle andtiredamag eth ro ugh
tir etyp esand sizes that have notbe en
ap prove d Fo
rsaf etyre ason s,on lyuse tires, wheel s
and accessories whic hha ve been speciall y
appr ovedby Mer cedes-Ben zfo ryo ur vehicle.
These tires arespecially adaptedto thecon ‐
tr ol systems, suchas ABS ,ES P®
and
4MA TIC,andmarkedas follo ws :
R MO =Mer cedes-Ben zOr iginal R
MOE =Mer cedes-Ben zOr iginal Extended
(r un-f lattireonl yfo rcer tain wheels)
R MO1 =Mer cedes -Benz Original (onlycer ‐
ta in AMG tires)
Cer tain charact eristic s,suc has han dling,
ve hicle noise emissions, consumption, etc.
ma yot her wise beadv ersely affect ed. Fur‐
th er mor e,other tiresizes could result inthe
tir es rubbing agains tth ebody andaxle com‐
ponen tswhen loaded. Thiscould result in
damag eto thetir eor theve hicle.
Onl yuse tires, wheels andaccessor iesthat
ha ve been checkedand recomme ndedby
Mer cedes-Ben z. *
NO
TERisk todriving safetyfrom retrea ‐
de dtir es Re
trea de dtir es arenei ther tested nor recom‐
mend edbyMer cedes-Ben z,since prev ious
damag ecan notalw aysbe detected on
re trea de dtir es .
Fo rth is reason drivin gsaf etycan notbe guar ‐
ant eed. Whe
elsand tire s 325

Obser
vethefo llo wing when selecting,ins talling
and replacing tires:
R Further mor e,theuse ofcer tain tiretypes in
cer tain regions andareas ofoper ation can
be highl ybenef icial.
R Onlyuse tires and wheels ofthesame type
(summer tires, wint ertires, MOEx tende d
tir es) and thesame make.
R Onlyins tallwheels ofthesame sizeonone
axle (leftand right).
It is onl yper missible toins talla dif fere nt
wh eelsi ze intheeve ntofaflat tirein order
to drive to thespecialis two rkshop.
R Vehicl eswith atir epr ess uremonit oring
sy stem: Allinstalled wheels mustbe equip‐
ped withfunc tioningsensorsfo rth etir e
pr essur emonit oring system.
R Attemp eratur esbelo w45°F (7°C) usewin‐
te rtir es orall-seaso ntir es mar kedM+S for
all wheels .
Wi nter tires bearing the004D snowflak esym‐
bol inaddition totheM+S marking prov ide th
ebes tpossible grip inwintr yro ad con di‐
tio ns.
R ForM+S tires, onlyuse tires wit hth esame
tr ead.
R Obser vethemaximum permissible speedfor
th eM+S tires installed.
If th etir e's maximum speedisbelo wthat of
th eve hicle, this mus tbe indic ated byan
appr opriatelabel inthedr iver's field of
vision.
R Break inne wtires atmoder atespeeds for
th efirs t60 miles(1 00 km) .
R Replace thetir es afte rsix yearsat thelat est,
re ga rdless ofwe ar.
R Wh enreplac ingwith tires that donotfe a‐
tur eru n-flat charact eristics :ve hicles with
MOExt ended tires areno teq uipped witha
TIREFIT kitatthefa ct or y. Eq uip th eve hicle
wit haTIREFIT kitafte rre placing withtir es
th at do notfe atur eru n-f latch aract eristic s,
e.g .wint ertires.
Fo rmor einf ormation onwhee lsand tires, con‐
ta ct aqu alif ied spec ialistwo rkshop. Be
sureto also obse rveth efo llo wing further
re lat ed subje cts:
R Noteson tirepr essur e(/ page30 7)
R Tire and Loadi ngInfo rm atio nplacar d
(/ page31 2)
R Tire size designation, load-bearing cap acity,
spe edrating andload index(/ pag e320)
R Tire pressur eta ble (/ page309)
R Noteson theemer gency sparewheel
(/ page33 4) &
WARNIN GRisk ofacci dent caused by
non-a pprove dtir etypes
If yo uuse tiretype sth at have notbe en adap‐
te dto chang esmade tothefa ct or yspe ed
li mit, this can have thefo llo wing consequen‐
ces:
R The tires areno tsuit able forhigh speeds
and thecor responding driving dynamics.
R The tires wearune venly and affect the
ro adw orthines sof theve hicle. Wheels
andtires 32
7

R
ABS, ESP®
and cruise contr olop erati on
ar ere strict ed.
Thi scan jeop ardize road safety. #
Onlyuse tiretypes that have been
appr ovedfo rth emaximum permissible
speed setand theve hicle. No
teson rotat ing whee ls &
WARNIN GRisk ofinju rythro ugh differ‐
ent whee lsizes
Rot atin gth efront and rear wheels can
se verely im pa irth edr iving charact eristic s.
The wheel brak es orsuspe nsion com ponents
ma yalso bedamag ed. #
Rotate front and rear wheels onlyifth e
wheels andtires areof thesame dimen‐
sions. The
wearpat tern son thefront and rear wheels
dif fer:
R Front wheels wearmor eon thetir eshoulder R
Rear wheels wearmor ein thecent erofthe
tir e
Do notdr ive wi th tires that have toolittle tread
dep th.Thi ssig nifica ntlyre duces traction onwet
ro ads (hydr oplan ing).
On vehicles that have thesame sizefront and
re ar wheels ,ro tate thewheels accordingtothe
int erva ls in thetir emanuf acturer'swarrant y
book inyour vehicle documents. Ifth is is no t
av ailable, rotate thetir es every
3000 to6000 miles(500 0to 10,000 km),
dependin gon thewe ar.En sur eth at thedir ect ion
of rotatio nis ma intained .
Ob serveth eins truction sand safetyno teson
"Cha nging awheel" whendoing so
(/ page328). No
teson sto ring wheels When
stor ing wheels, observethefo llo wing
no tes:
R Afterre mo ving whee ls,stor eth em inacool,
dr yand prefer ably darkplace. R
Protect thetir es from contact with oil, grease
or fuel. Pr
epar ingtheve hicl efo ra wh eelch ang e Re
quirement s:
R The requ ired tire-c hang eto ol kit isavailable.
If yo ur vehicle isno teq uipped withth etir e-
ch ang eto ol kit, consult aqu alif ied spec ialist
wo rkshop tofind outab ou tsu itab letools.
R The vehicle isno ton aslope.
R The vehicle ison solid, non-slipper yand leve l
gr ou nd . #
Apply theelectr icpar king brak emanually . #
Movethefront wheels tothest ra ight -ahead
posit ion. #
Shif tth etra nsmiss iontoposition 005D. #
Switc hof fth eengine. #
Mak esur eth at theengine cannotbe star ted. #
Place choc ks orother suitable items under
th efront and rear ofthewheel that isdiago‐
nall yoppos ite th ewheel youwish tochang e. 328
Wheelsand tires

Emer
gency spar ewheel No
teson theemer gency spar ewheel &
WARNIN GRisk ofacci dent caused by
inc orrect whe eland tiredimensi ons
The wheelor tiresize andthetir etype ofthe
emer gency sparewheel orspar ewheel and
th ewheel tobe replaced maydif fer. The
emer gency sparewheel orspar ewheel can
sign ifican tly im pair drivin gch aract eristic sof
th eve hicle.
To preve nthazardous situa tions: #
Adaptyo ur drivin gst yle accor dinglyand
dr ive car efull y. #
Neverins tallmor eth an oneemer gency
spa rewheel orspar ewheel that dif fers
in size . #
Onlyuse anemer gency sparewheel or
spar ewheel ofadif fere nt size briefly. #
Donotsw itchof fESP ®
. #
Have theemer gency sparewheel or
spar ewheel ofadif fere nt size replaced
at thenear estqu alif ied spec ialistwo rk‐ shop.
Thenewwheel mustha ve the
cor rect dimensi ons. Obs
erve thefo llo wing noteson installing an
emer gency sparewheel:
R Chec kth etir epr essur eof theemer gency
spa rewheel installed. Correct thepr essur e
as neces sary.
R The maximum permissible speedwithan
emer gency sparewheel installed is50 mph
(80 km/ h).
R Donoteq uip theemer gency sparewheel
wit hsn ow chains .
R Replace theemer gency sparewheel afte rsix
ye arsat thelat est,re ga rdless ofwe ar.
% Ve
hicl eswith atir epr ess uremonit oring
sy stem: Ifan emer gency sparewheel is
ins talled thetir epr essur emonit oring system
cann otfunction reliabl y.Fo ra fe w min utes
af te ran emer gency sparewheel isins talled,
th esy stem mayst ill displa yth etir epr essur e
of there mo vedwheel. Onlyre star tth esy s‐
te m again when theemer gency sparewheel
has been replaced withane wwheel. Be
sureto also obse rveth efo llo wing further
re lat ed subje cts:
R Noteson tirepr essur e(/ page30 7)
R Tire and Loadi ngInfo rm atio nplacar d
(/ page31 2)
R Tire pressur eta ble (/ page309)
R Noteson installing tires (/ page325) 33
4
Wheels andtires