2021 MERCEDES-BENZ GT COUPE ESP

#
Onlyuse batterych arge rs wit hamax i‐
mum chargin gvo ltag eof 14.8 V. When
chargin gth ebatt eryand during star tin g
assis tance, alwa ys use thejum p-start connec‐
tion pointintheengine compartmen t.
* NO
TEDama ging thebatt eryth ro ugh
ove rvolt age When
chargin gusin gabat tery charge rwit h‐
out amaximu mchargin gvo ltag e, thebatt ery
or theve hicle electr onics maybe damag ed. #
Onlyuse batterych arge rs wit hamax i‐
mum chargin gvo ltag eof 14.8 V. &
WARNIN GRisk ofexplosion during
ch argin gpr oce ssand star tin gassis tance
Dur ing thech argin gpr oce ssand star tin g
assis tance, thebatt eryma yre lease anexplo‐
siv ega smixtur e. #
Avoid fire ,open flames ,cr eat ing spar ks
and smoking. #
Mak esur eth er eis suf ficie ntventil a‐
tio n. #
Donotle an ove ra batt ery. &
WARNIN GRisk ofexplosion from afro‐
zen battery
A disc hargedbatt eryma yfreeze attemp era‐
tur es slightl yabo veorbelo wfreezing point.
Dur ing star tin gassis tance orbatter ych arg‐
ing ,bat tery gascan bereleased. #
Alw aysallo wabatt eryto thaw before
ch argin git or per form ing star tin gassis ‐
ta nce. If
th eindicat or/warning lampsintheins trument
clus terdo notlig ht up atlow temp eratur es,itis
ve ry likelyth at thedisc hargedbatt eryhas fro‐
zen .In this case youma yne ither jump-start the
ve hicle norcharge thebatt ery.
The service life of abatt eryth at has been
th awe dma ybe dramaticall yshor tened .The
st ar tin gch aract eristic sma ybe impair ed,espe ‐
ciall yat low temp eratur es. It
is recomme ndedthat youha ve ath aw ed bat‐
te ry checkedat aqu alif ied spec ialistwo rkshop.
* NO
TEDama gecau sed bynum erou sor
ex tende datt em ptsto star tth eengine Nu
me rous orextende datt em ptsto star tth e
engine maydamag eth ecat alytic converter
due tonon-co mbusted fuel. #
Avoid numer ousand extende datt em pts
to star tth eengine. Obser
vethefo llo wing pointsdur ing star tin g
assis tance and when chargin gth ebatt ery:
R Onlyuse undamag edjum per cables/c harg‐
ing cables withasuf ficie ntcross -secti onand
insu late dte rm inal clam ps.
R Non-insulat edpar tsof thete rm inal clam ps
mus tno tcom eint ocon tact with other metal
par tswhile thejum per cable/c harging cable
is con nect edtothebatt ery/jum p-start con‐
nectio npoi nt.
R The jumper cable/c harging cable mustno t
com eint ocon tactwi th anypar tswhic hma y
mo vewhen theengine isrunning . Br
ea kdo wnassist anc e283

#
Con nect posi tiveclam p2 onyour vehicle to
th epositiv epole ofthedonor batteryusing
th ejum per cable/c harging cable. Always
begin withpositiv eclam p2 onyour ow n
ve hicle firs t. #
During star ting assistance :st ar tth e
engine ofthedonor vehicle andrunat idle
spe ed. #
Connect theneg ativepole ofthedonor bat‐
te ry and grou nd point 3 ofyour ow nve hicle
by usin gth ejum per cable/c harging cable.
Begin withth edonor batteryfirs t. #
During star ting assistance :st ar tth e
engine ofyour ow nve hicle. #
Dur ing thech argin gpr oc ess :st ar tth e
ch argin gpr oce ss. #
Dur ing star ting assistance :le tth eengines
ru nfo rse veralmin utes. #
Dur ing star ting assistance :bef oredis con‐
necting thejum per cable, switchon anelec‐
tr ical consumer inyour ow nve hicle, e.g.the
re ar wind owheat eror lighting. When
thest ar tin gassis tance/c harging proce ss
is com plet e, per form thefo llo wing steps: #
First,re mo vethejum per cable/c harging
cable from ground point 3and theneg ative
pole ofthedonor battery, then from positiv e
clam p2 and thepositiv epole ofthedonor
batt ery. Begi nea ch tim ewi th thecon tacts
on your ow nve hicle firs t. #
Afterre mo ving thejum per cable/c harging
cable, closecover1 ofposi tiveclam p2.
Fu rther information canbeobt ained ataqu ali‐
fi ed specialis two rkshop. Re
plac ingthe 12Vbatt ery #
Obs erve theno teson the12 Vbatt ery
(/ page28 1).
Mer cedes-Benz recomme ndsthat youha ve the
12 Vbatt eryre placed ataqu alif ied spec ialist
wo rkshop, e.g.atan aut hor ized Mercedes-Benz
Cent er. If
yo uwa nttoreplace thebatt eryyo urself ,
obse rveth efo llo wing notes:
R Replace afa ulty battery wit habatt erywhic h
mee tsthespecif icvehicle requ iremen ts.
The vehicle iseq uipped withalit hium-ion
batt ery. Fu llve hicle functionality isonl yguar‐
ant eed withalit hium-ion battery. Fo rsaf ety
re ason s,Mer cedes-Ben zre comme ndsthat
yo uon lyuse batteries whic hha ve been tes‐
te dand appr ovedfo ryo ur vehicle by
Mer cedes-Ben z.
R Use detach able partssuc has vent hos es,
el bo wfitting sor term inal covers from the
batt erywhic his to be replaced.
R Mak esur eth at theve nt hos eis alwa ys con‐
nect edtotheor iginal opening ontheside of
th ebatt ery.
Ins tallan yex istin gor supplied cellcaps.
Ot her wise, gases orbatt eryacid could
escape.
R Mak esur eth at detach able partsarere con‐
nect edinthesame way. Br
ea kdo wnassista nce 28
5

No
teson noise orunusua lhand lingcharac‐
te rist ics
Mak esur eth er ear eno vibr ations, noisesor
unusual handling charact eristic swhen theve hi‐
cle isin mo tion. Thismayindicat eth at the
wheels ortires aredamag ed.Hidde ntir edam‐
ag ecould alsobecausin gth eunusual handling
ch aract eristic s.
If yo ususp ectthat atir eis malf unctionin g,
re duce your spee dimm ediat elyand have the
tir es and wheelsch eckedat aqu alif ied spec ialist
wo rkshop. No
teson regular lyinspect ingwheels and
tir es &
WARNIN GRisk ofinju rythro ugh dam‐
ag ed tires
Dam aged tires can caus etir epr ess ureloss . #
Chec kth etir es regular lyforsigns of
dama geand replace anydamag edtires
immediat ely. &
WARNIN GRisk ofhydroplaning dueto
insuf ficie nttiretrea d
Insu fficien ttir etread willresult inreduced
tir egr ip.
In hea vyrain or slush therisk ofhydroplaning
is incr eased, inpar ticular wherespeed isno t
adap tedto suit thecon ditions . #
Thus, yousho uld regular lych eckth e
tr ea dde pthand thecon dition ofthe
tr ea dacr oss theent ire widt hof all tires.
Minimum tread depthfor:
R Summ ertires: 00CEin(3 mm)
R M+S tires: 00CFin (4mm) #
Forsaf etyre ason s,replace thetir es
bef oreth eleg ally -prescr ibed limit for
th eminimum tread depthisreac hed. Car
ryout thefo llo wing checks on allwheels reg‐
ular ly,at leas tonce amont hor as requ ired, for
ex am ple, prior toalon gjo ur ne yor drivin gof f-
ro ad:
R Chec kth etir epr essur e(/ page293). R
Visual lyinspect wheelsandtires fordama ge.
R Chec kth eva lve caps.
R Visual checkof thetir etread depthand the
tir econt actsurface across theent ire widt h.
The minimum tread depthforsummer tires is
00CE in(3 mm) andforwint ertires 00CF in
(4 mm). Six
mar ks1 showwher eth ebar indicat ors
(ar row )ar eint egr ated intoth etir etread. They
ar evisible onceatir etread depthofappr ox‐
imat ely00CD in(1.6 mm) hasbeen reac hed. 292
Wheelsand tires

No
teson sno wch ains &
WARNIN GRisk ofacci dent dueto inc or‐
re ct mou nting ofsno wch ains
If yo uha ve mount edsno wch ains tothefront
wheels, thesno wch ains maydr ag agains t
th eve hicle body orchassis components.
This couldcaus edamag eto theve hicle or
th etir es. #
Nevermount snowch ains onthefront
wheels. #
Onlymount snowch ains onthere ar
wheels inpair s. *
NO
TEDama getothewheel trim from
mount edsno wch ains If
sn ow chains aremoun tedto steel wheels,
th ewheel trims can bedamag ed. #
Remo vethewheel trims ofsteel wheels
bef oremount ingsnowch ains . Obse
rveth efo llo wing noteswhen usingsnow
ch ains :
R Snow chains areon lype rm issible forcer tain
wheel/t ire com binat ions.Yo ucan obtain
inf ormat ionabout this from anaut hor ized
Mer cedes -Benz Cent er.
R Forsaf etyre ason s,on lyuse snow chains that
ha ve been specif icallyapproved foryo ur
ve hicle byMer cedes-Ben z,or sno wch ains
wit hth esame qualit yst andar d.
R Ifsn ow chains areins talled, themaximum
per missible speedis30 mph(50 km/h).
R Vehicl eswith leve lcontr ol:Ifsno wch ains
ar eins talled, onlydr ive at raised vehicle
le ve l.
% Youcan deac tivateES P®
to pull away
( / pag e12 4).Thi sal lo ws thewheels to
spin, achie ving anincr eased driving forc e. Ti
re pres sur e No
teson tirepr essur e &
WARNIN GRisk ofacci dent dueto insuf ‐
fi cie ntor excess ive tir epr ess ure
Under inflate dor ove rinf late dtir es pose the
fo llo wing risk s:
R The tires ma ybur st,especiall yas the
load andvehicle speed increase.
R The tires ma ywe arexc essiv elyand/or
une venly, whic hma ygr ea tly impair tire
traction .
R The drivin gch aract eristic s,as wellas
st eer ing and braking, maybe greatl y
im pair ed. #
Com plywithth ere comme ndedtire
pr ess ureand checkth etir epr essur eof
all tires including thespar ewheel regu‐
lar ly:
R atleas tonce amont h
R when theload chang es Whee
lsand tires 293

R
beforeembar kingon along erjour ney
R ifoper ating condition sch ang e,e.g .of f-
ro ad drivin g #
Adjus tth etir epr essur eas neces sary. Ti
re pressur ewhic his toohigh ortoolow can:
R Shor tenth eser vice life of thetir es.
R Cause increased tiredamag e.
R Adversely affect drivi ng charact eristic sand
th us drivin gsaf ety, e.g. due tohydroplaning. &
WARNIN GRisk ofan acci dent dueto
insuf ficie nttirepr ess ure
Ti re swit hpr essur eth at istoolow can over‐
heat andburstas are sult.
In addition, they also sufferfr om excessiv e
and/or irre gular wear,whic hcan significan tly
im pair thebr aking proper tiesand thehan‐
dling charact eristic s. #
Avoid excessiv elylow tirepr essur esin
all thetir es, including thespar ewheel. Ti
re pressur ewhic his toolow can cause:
R Tire malfu nctions asare sult ofove rheating
R Impair edhandling charact eristic s
R Irre gular wear
R Incr eased fuelconsum ption &
WARNIN GRisk ofacci dent from exces‐
siv etir epr ess ure
Ti re swit hexc essiv elyhigh pressur ecan
bur stbecause they aredamag edmor eeasil y
by highw ayfill, po tholes etc.
In addition, they also sufferfr om irre gular
we ar,whic hcan significan tly im pair thebr ak‐
ing proper tiesand thehandling charact eris‐
tic s. #
Avoid excessiv elyhigh tirepr essur esin
all thetir es, including thespar ewheel. Ti
re pressur ewhic his toohigh cancause:
R Increased brakin gdis tance
R Impaired handl ing charact eristic s
R Irre gular wear R
Impair eddrivin gcom fort
R Sus ceptibility to damag e &
WARNIN GRisk ofacci dent caused by
re peat eddrop intirepr essur e
If th etir epr essur edr ops repeat edly,th e
wheel, valve or tirema ybe damag ed.
Insuf ficie nttirepr ess urecan causethetir es
to bur st. #
Inspect thetir efo rsigns offore ign
obje cts. #
Chec kwhe ther thewheel orvalve has a
leak . #
Ifyo uar eunab leto rectify thedamag e,
con tact aqu alif ied spec ialistwo rkshop. Yo
ucan find informa tionon tirepr ess urefo rth e
ve hicle's fact or y-ins talled tires on thefo llo wing
labels:
R Tire and Loadi ngInfo rm atio nplacar don the
B‑pil larof your vehicle (/page299).
R Tire pressur eta ble ontheinside ofthefuel
fi ller flap (/ page29 5). 29
4
Whee lsand tires

Obser
vethemaximum tirepr essur e
(/ page305).
Use asuit able pressur ega ug eto checkth etir e
pr essur e.The outerappear anceofatir edoes
no tper mit anyre liable conclusion aboutthetir e
pr essur e.
Onl ycor rect tirepr ess ure whe nth etir es are
cold. Condition sfo rcold tires:
R The vehicle hasbeen parkedwit hth etir es
out ofdir ect sunlight forat lea stthre ehour s.
R The vehicle hastrave led less than 1mile
(1 .6 km ).
The vehicle's tires heat upwhen driving. Asthe
te mp eratur eof thetir es incr eases, sotoodoes
th etir epr essur e.
Ve hicl eswith atir epr ess uremonit oring sys‐
te m: Youcan also checkth etir epr essur eusing
th eon- board computer.
The tirepr essur ere comme ndedforincr ease d
loa d/spee din thetir epr essur eta ble can affect
th eride comf ort. &
WARNIN GRisk ofacci dent dueto
uns uitable accessories ontireva lve
If yo umoun tuns uitable accessories onto tire
va lves, thetir eva lves ma ybe ove rloaded and
malfunct ion,whic hcan cause aloss oftire
pr essur e.Afterm arke ttir epr es su re monit or‐
ing systems willcause thetir eva lve to
re main open, depending onthedesign. This
can also result inaloss oftirepr essur e. #
Onlyscr ew standar dva lve caps orvalve
cap sspe cifica llyapprove dby
Mer cedes-Ben zfo ryo ur vehicle onto
th etir eva lve. Ti
re pres sur etab le The
tirepr ess ureta ble ison theinside ofthe
fuel filler flap.
% The datasho wnintheimag esisexam ple
dat a. If
on eor mor etir esiz es prece deatir epr essur e,
th efo llo wing tirepr essur einf ormatio nis onl y
va lid forth ose tiresizes andtheir respectiv e
load condition.
The load conditions "partially laden" and"fully
laden" aredef ined intheta ble fordif fere nt num ‐
be rs of passeng ersand amounts oflugg age. The
actual number ofseats maydif ferfr om this. Wheels
andtires 295

Some
tirepr ess ureta bles onlysho wtherim
diame terins tead ofthecom pletetiresize, e.g.
R1 8.The rim dia me teris par tof thetir esize and
can befound onthetir eside wall(/ page306 ).
R Tire and Loadi ngInfo rm atio nplacar d
(/ page29 9)
R Max imum tirepr essur e(/ page30 5) 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(/ page293) R
Tire pressur eta ble (/ page295 )
R Tire and Loadi ngInfo rm atio nplacar d
(/ page29 9) 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
inf lated totheinf lation pressur ere comme n‐
ded bytheve hicle manuf actureron theve hi‐
cle placar dor tireinf lation pressur elabel .(If
yo ur vehicle hastires ofadif fere nt size than
th esize indicat edon theve hicle placar dor
tir einf lation pressur elabel ,yo usho uld deter‐
mine thepr oper tireinf lation pressur efo r
th ose tires.)
As anadded safetyfe atur e,your vehicle has
been equipped withatir epr essur emonit or‐
ing system (TPMS) that illumin ates alow tire 296
Wheelsand tires

pr
essur ete lltale when oneormor eof your
tir es issign ifican tly unde r-inf lated. Accor d‐
ing ly,whe nth elow tirepr essur ete lltale illu‐
min ates, yousho uld stop and checkyo ur
tir es assoo nas poss ible, andinflateth em to
th epr oper pressur e.Driving onasignif i‐
cant lyunder -inflated tirecauses thetir eto
ove rheat and canlead totirefa ilur e.Un der -
inf lation alsoreduces fuelefficie ncy and tire
tr ea dlife ,and mayaf fect theve hicle's han‐
dling andstopping ability.Please note that
th eTPMS isno ta subs titutefo rpr oper tire
maint enance, anditis thedr iver's responsi‐
bility tomaint aincorrect tirepr ess ure, eve n
if under -inflatio nhas notre 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 ateth at
th esy stem isno toper ating proper ly.The
TPMS malfunct ionindicat oriscombin edwith
th elow tirepr essur ete lltale. When thesy s‐
te m detects amal functi on,theindicat or
lam pwill flash forapp roxima tely one minu te and
then remain continuously illumina ted.
This sequence willcontinue upon subseq uent
ve hicle star t-ups aslon gas themalfunct ion
ex ists.
When themalfunct ionindicat orisillumina‐
te d, thesy stem mayno tbe able todetect or
sig nal low tirepr ess ureas intende d.TPM S
mal functi onsmayoccu rfo ra va riet yof rea‐
son s,inc ludin gth eins tallation ofreplace‐
ment oralternat etir es orwheels ontheve hi‐
cle that prev ent theTPMS from func tioning
pr oper ly.
Alw aysch eckth eTPMS malfunct iontelltale
af te rre placing oneormor etir es orwheels
on your vehicle toensur eth at there place‐
ment oralternat etir es and wheels allowthe
TPMS tocontinu eto function proper ly. The
system checks thetir epr essur eand thetir e
te mp eratur eof thetir es installed totheve hicle
by means ofatir epr essu resensor .
The tirepr essur eand thetir ete mp eratur e
appear inthemultifunc tiondispla y
(/ page298). If
th er eis asubs tantia lpr ess ureloss orifth e
tir ete mp eratur eis exc essiv e,youwill bewarned
in thefo llo wing ways:
R viadisp lay messa ges(/ page368)
R viathe0077 warning lam pin theins trument
clus ter
The tirepr essur emonit oring 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 .
In mos tcases, thetir epr essur emonit oring sys‐
te m wil lau tomatical lyupd ateth ene wrefere nce
va lues afte ryo uha ve chang edthetir epr essur e.
Yo ucan ,ho we ver,also updat eth ere fere nce val‐
ues byrestar tin gth etir epr essur emonit oring
sy stem manuall y(/ page298).
Sy stem limit s
The system maybe impair edorma yno tfunc tion
in thefo llo wing situat ions:
R thetir epr essur ehas been setincor rectl y
R ther eis asudden pressur eloss caused, for
ex am ple, byafo re ign obje ctpene tratin gth e
tir e Wh
eelsand tires 29
7