MERCEDES-BENZ GT 4-DOOR COUPE 2021 AMG Owner's Manual

#
Remo vethehub caps ifneces sary
(/ page329). #
Raise theve hicle (/page329). Re
mo ving and inst alli ng thewheel trim/h ub
cap s Re
quirement s:
R The vehicle isprepar edfora whee lch ang e
(/ page32 8).
Pla stic hub cap #
Toremo ve:tur nth ecent ercoverof thehub
cap count er-cloc kwise andremo vethehub
cap. #
Toins tall: makesur eth at thecent ercover
of thehub capistur ned count er-cloc kwise. #
Position thehub capand turnth ecent er
co vercloc kwise untilthehub capengages
ph ysicall yand audibly . Alum
inum hubcap #
Toremo ve:po sitio ncent ercap 2from the
tir e-c hangeto ol kit onhub cap1. #
Position wheel wrenc h3 oncent ercap 2. #
Using wheel wrenc h3, turnhub cap1
count er-cloc kwise andremo veit. #
Toins tall: follo wtheins truction sabo vein
re ve rseor der .
% Specif iedtight ening torq ue: 20lb-ft
(2 7Nm). Ra
ising theve hicl ewhe nch angi ngawhe el Re
quirement s:
R Ther ear eno per sons intheve hicle.
R The vehicle hasbeen prepar edfora whee l
ch ang e(/ page32 8).
R The wheel trims and hub caps have been
re mo ved(/ page329 ).
Im por tant noteson using thejac k:
R Use onlya ve hicle-specif icjac kth at has
been approved byMer cedes-Ben zto raise
th eve hicle.
R The jackis onl ydesigned forra ising and
holdin gth eve hicle fora shor ttime whilea
whee lis being chang edand notfo rmaint e‐
nance workund ertheve hicle.
R The jackmus tbe placed onafirm ,fl at and
no n-slip surface. Ifneces sary,use alar ge,
fl at, load- bearing,no n-slip unde rlay .
R The foot ofthejac kmus tbe position edverti‐
call yunder thejac ksuppor tpoint . Wheels
andtires 329

Ru
les ofcon duct when theve hicle israised:
R Neverpla ceyour han dsorfeet und erthe
ve hicle.
R Neverlie under theve hicle.
R Donotst ar tth eengine anddonotre lease
th eelectr icpar king brak e.
R Donotopen orclose anydoor sor theta il‐
ga te. #
Using thelug wrenc h,loosen thewheel bolts
on thewheel youwish tochang eby about
on efull turn.Do notuns crew thebolts com‐
ple tely. Po
sition ofjac ksuppor tpoints &
WARNIN GRisk ofinju ryfrom incor rect
pos itioning ofthejac k
If yo udo notposi tionth ejac kcor rectl yat
th eappr opriatejac king point oftheve hicle,
th ejac kcould tipwithth eve hicle raised. #
Onlyposit ionthejac kat theappr opri‐
at ejac king point oftheve hicle. The
base ofthejac kmus tbe position ed
ve rticall yunder thejac king point ofthe
ve hicle. 330
Wheels andtires

*
NO
TEVehicle damag efrom thejac k If
yo udo notposi tionth ejac kcor rectl yat
th eappr opriatejac ksuppor tpoint ofthe
ve hicle, thejac kcould tipove rwit hth eve hi‐
cle raised. #
The jackis design edexclu sively for
jac king uptheve hicle atthejac ksup‐
por tpoint s. #
Take thera tche tou tof thetir e-c hang eto ol
kit and place iton thehe xagon nutofthe
jac kso that theletter s"A UF" arevisible. #
Position suppor t2 ofjac k4 onjacksup‐
por tpoint 1. #
Turn ratche t3 clockwise untilsuppor t2
sit scom pletely on jacksuppor tpoint 1and
th ebase ofthejac klies evenlyon the
gr ou nd . #
Turn ratche t3 unti lth etir eis raised amaxi‐
mum of1.2 in (3 cm) from thegr ound. #
Loosen andremo vethewheel (/page33 1). Re
mo ving awh eel Re
quirement s:
R The vehicle israised (/page329).
Ve hicl eswith AMG ceramic high-pe rfor m‐
ance composit ebr aki ng system:
* NO
TEDama getothecer amic brak edisk
when chang ingawheel Mer
cedes -AMG vehicl eswith ceramic
br ak edis ks:dur ing remo valand reposition ‐
ing ofthewheel, thewheel rim ma yst rike
th ecer amic brak edisk anddamag eit. #
Take par ticular care. #
Ask another per son forassi stanc eor
use asec ondcen tering pin. Whe
nch ang ingawheel, avoidappl ying anyfo rc e
to thebr ak ediscs, sincethis could impair the
le ve lof com fort when brakin g. Wheels
andtires 33
1

*
NO
TEDama getothre adin gfrom dirton
wheel bolts #
Donotplace wheel boltsin san dor on
a dir tysur face. #
Unscr ew theupper mostwheel boltcom‐
ple tely. #
Screw align mentbolt 1intoth eth re ad
ins tead ofthewheel bolt. #
Unscr ew there maini ngwhee lbolts com‐
ple tely. #
Remo vethewheel. Mounting
ane wwheel &
WARNIN GRisk ofacci dent from losing a
whe el
Oil ed, grea sed ordamag edwhe elbol t/whe el
nut thre ads orwheel hub/wheel mounting
bolt thre ads can caus eth ewheel bolts/
wheel nutstocome loose. #
Neveroil orgrease theth re ads. #
Intheeve ntofdama getotheth re ads,
con tact aqu alif ied spec ialistwo rkshop
immediat ely. #
Have thedamag edwheel boltsordam‐
ag ed hub thre ads replaced. #
Donotcon tinue driving. #
Obser vetheinf ormation onthech oice of
tir es (/ page325).
Fo rtir es wit haspecif ieddirection ofrotatio n,an
ar ro w on theside wallof thetir eindicat esthe
cor rect dire ction ofrotatio n.Ob serveth edir ec‐
tion ofrotatio nwh en installing. *
NO
TEDama getothecer amic brak edisk
when chang ingawheel Mer
cedes -AMG vehicl eswith ceramic
br ak edis ks:dur ing remo valand reposition ‐
ing ofthewheel, thewheel rim ma yst rike
th ecer amic brak edisk anddamag eit. #
Take par ticular care. #
Ask another per son forassi stanc eor
use asec ondcen tering pin. #
Slide thewheel tobe mount edont oth e
align mentbolt andpush iton . &
WARNIN GRisk ofinju ryfrom tight ening
whee lbol tsand nuts
If yo utig hten thewheel boltsorwheel nuts
when theve hicle israised, thejac kcould tip. #
Onlytight enwheel boltsorwheel nuts
when theve hicle ison thegr ound. #
Besureto obser vetheins truction sand
saf etyno teson "Cha nging awheel"
(/ page325). 332
Wheels andtires

#
Forsaf etyre ason s,on lyuse wheel bolts
whic hha ve been approvedby Mer cedes-
Benz andforth ewheel inqu estion .
* NO
TEDama getopaintw orkof thewheel
ri m when screwing onthefirs twh eelbo lt If
th ewheel hastoomuc hpla ywhen screw‐
ing inthefirs twh eelbo lt, thewheel rim pai nt
can bedama ged. #
Press thewheel firm lyag ains tth e
wheel hubwhen screwing onthefirs t
wheel bolt. #
Tight enthewheel boltsevenlyin adi ag ona l
pa tter nin theor der indicat eduntil they are
fi ng er-tig ht. #
Unscr ew and remo vethealignment bolt. #
Tight enthelas twheel boltuntil itis fing er-
tig ht. #
Lowe rth eve hicle (/page333). Lo
we ring theve hicl eaf te ra wh eelch ang e Re
quirement s:
R The newwheel hasbeen installed
(/ page332) . #
Tolowe rthe vehicl e:pla cethera tche tont o
th ehe xagon nutofthejac kso that thelet‐
te rs "AB "ar evis ible and turnco unt er-cloc k‐
wise. #
Tight enthewheel boltsevenlyin adi ag ona l
pa tter nin theor der indicat ed1 to5 with
an init ialmax imum forc eof 59 lb-ft(80 Nm). #
Tight enthewheel boltsevenlyin adi ag ona l
pa tter nin theor der indicat ed1 to5 to th
especif iedtight ening torq ue of111 lb-ft
(1 50 Nm). &
WARNIN GRisk ofacci dent dueto inc or‐
re ct tigh tening torq ue
Th ewh eelscou ldcome looseifth ewheel
bolts orwheel nutsareno ttight ened tothe
pr escr ibed torq ue. #
Ensu rethat thewheel boltsorwheel
nuts aretight ened tothepr escr ibed
tight ening torq ue. #
Ifyo uar eno tsur e,do notmo vethe
ve hicle. Contactaqu alif ied spec ialist
wo rkshop andhave thetight ening tor‐
qu ech eckedimmediat ely. #
Chec kth etir epr essur eof thene wlyins talled
wheel andadjus tit ifnec essar y. #
Vehicl eswith atir epr ess uremonit oring
sy stem: Restar tth etir epr essur emonit oring
sy stem (/ page31 2).
Ex cep tion:thene wwheel isan emer gency
spa rewheel. Wheels
andtires 333

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

No
teson tech nical data
The datast at ed onlyapplies tovehicles with
st andar deq uipme nt.Yo ucan obtain further
inf ormation from anaut hor ized Mercedes- Benz
Cent er. Ve
hicl eele ctroni cs Tw
o-w ayradio s No
teson installing two-w ayradio s &
WARNIN GRisk ofacci dent dueto
im proper workon two-w ayradios
If tw o-w ayradios aremanipulat edorretrof it‐
te dincor rectl y,theelectr omagne ticradiation
fr om thetw o-w ayradios caninterfere wit h
th eve hicle electr onics andjeopar dizethe
oper ating safetyof theve hicle. #
Yousho uld have all workon electr ical
and electr oniccomponent scar ried out
at aqu alif ied spec ialistwo rkshop. &
WARNIN GRisk ofacci dent dueto
im proper opera tionoftwo-w ayradios
If yo uuse two-wa yra dios intheve hicle
im proper ly,th eir electr omagne ticradiation
can disruptth eve hicle's electronics. Thisis
th ecase inthefo llo wing situat ions,in par tic‐
ular :
R The two-w ayradio isno tcon nectedto an
ex terior ant enna.
R The exterior ant enna isins talled incor‐
re ctly orisno ta low- reflect ion antenn a.
This could jeopar dizetheoper ating safetyof
th eve hicle. #
Have thelow- reflect ion exterior
ant enna installed ataqu alif ied spec ial‐
is two rkshop. #
When operating two-w ayradios inthe
ve hicle, alwaysconn ectthem tothe
lo w- reflect ion exterior ant enna. *
NO
TEInva lidation oftheoper ating per‐
mit due tofailur eto com plywith the
ins truct ions forins tallation anduse The
oper atingper mit maybe inva lidat edif
th eins truction sfo rins tallation anduseof
tw o-w ayradios areno tobser ved. #
Onlyuse appr oved freq uency bands. #
Obser vethemaximum permissible out‐
put powe rin these freq uency bands. #
Onlyuse appr oved ant enn aposition s. Te
ch nica lda ta 335

1
Front roof area
2 Rear roof area
3 Rear fende rs
On there ar fende rs,it is recomme ndedthat you
ins tallth eant enn aon theside oftheve hicle
closes tto thecent erofthero ad.
Use Tech nica lSpe cifica tionISO/T S21 609 (Road
Ve hicles –"EMCs forins tallation ofafte rm arke t ra
dio freq uency transmit tingeq uipment ")when
re trof itti ng two-w ayradios. Complywithth e
leg alrequ iremen tsforde tach able parts.
If yo ur vehicle hasinstalling fortw o-w ayradio
eq uipment ,use thepo we rsupp lyand antenn a
con nectors prov ided inthepr e-ins tallation .
Obser vethemanuf acturer'ssupplement swhen
ins talling.
Tw o-w ayradio transmi ssion output
The maxi mum transm ission outpu t(PEAK) atthe
base oftheant enn amus tno texc eed theva lues
in thefo llo wing table.
Fr eq uency bandandmaxim um transm ission
out put Fr
eq uency band Maximumtransm is‐
sion output
Sho rtwa ve
3 -54 MHz (1
00 W)
4 m freq uency band
74 -88 MHz (30
W) Fr
eq uency band Maximumtransm is‐
sion output
2 m freq uenc yband
14 4-17 4MHz (50
W)
Te rres trial Trunk ed
Ra dio (TETRA)
380 -460 MHz (1
0 W)
70 cm freq uency
band
420 -450 MHz (35
W)
Tw o-w ayradio
(2G/3G/ 4G) (1
0 W) The
follo wing canbeused intheve hicle without
re strictions :
R Two-w ayradios withamaximum transmis ‐
sion output ofup to100mW
R RFtransmi tter swit htransmi tter freq uenci es
in the380 -41 0MHz freq uency bandanda
maximu mtransmi ssionoutpu tof up to2W
(TETR A) 336
Tech nica lda ta

R
Mobile phones (2G/3G/4G)
Ther ear eno restrictions whenpos itioning the
ant enn aon theoutside oftheve hicle forsome
wa vebands.
R Terres trial Trunk edRadio (TETRA)
R 70cm freq uency band
R 2G/3G/ 4G Ra
dio ope ratin gper mits forve hicl eco mp o‐
nent s
Manuf acturer informat ionabout wireless vehicle
com ponent scan befound usingth eke yphr ase
"R adio operating per mits"intheDigit alOper a‐
to r's Manua lin theve hicle, ontheInt erne tand
in theapp. Ve
hicl eiden tificati onplat e,VIN and engine
number
Ve hicl eiden tificati onplat e Ve
hicle identif ication plate(US Aonl y)
1 Maximum permissible gross vehicle weight
2 Maxim umpermissib lefront axle load
3 Maxim umpermissib lerear axle load
4 Paint code
5 VIN (vehicle identificat ion numb er) Te
ch nica lda ta 33
7

Ve
hicle identif ication plate(Canada only)
1 Maximum permissible gross vehicle weight
2 Maxim umpermissib lefront axle load
3 Maxim umpermissib lerear axle load
4 Paint code
5 VIN (vehicle identificat ion numb er)
The maxim umpermissib legross vehicle weight
is made upoftheve hicle weight ,all vehicle
occupants, thefuel andtheload. Themaximum
gr oss axle weight rating isthemaximum weight
th at can becar ried on one axle (front orrear
axle ). Ne
verexc eed themaximum permissible gross
ve hicle weight orthemaximum gross axle
we ight rating forth efront orrear axle .
VIN infront oftheright- hand front seat 1
Imprint ed VIN (vehicle identification number )
2 Floor covering Ad
diti onalplat es 1
Platewit hinf ormat ionabout emissionstest‐
ing, including confirm atio nof emis sions
guideli nesattheU. S. feder alleve las wellas
fo rCa lifor nia
2 Engine number stam ped intoth ecr ankc ase
3 VIN (vehicle identification number) asalabel
at thelowe redg eof thewindshield 338
Tech nica lda ta