2020 MERCEDES-BENZ A-CLASS SEDAN wheel size

The
wearpat tern son thefront and rear wheels
dif fer:
R Front wheels wearmor eon theshoulder of
th etir e
R Rear wheels wearmor eat 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 tat eth ewheels accordingtothe
int erva ls in thetir emanuf acturer'swarrant y
book inyour vehicle documents. Ifth is isno t
av ailable, rotate thetir es every
3,000 to6,000 miles(5 ,000 to10,000 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
(/ page44 7). 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. Ov
ervie wof thetir e-c han getool kit Apar
tfr om some country- specif icvariant s,vehi‐
cles areno teq uipped withatir e-c hang eto ol kit.
Fo rmor einf ormation onwhi chtire-c hangi ng
to ols arere qu ired and appr ovedfo rper form ing a
wheel chang eon your vehicle, consult aqu alif ied
spec ialistwo rkshop.
Yo ure qu ire th efo llo wing tools, forins tance, to
ch ang eawheel:
R Jack
R Choc k
R Lugwr enc h
R Alignmen tbolt The
tire-c hang eto ol kit islocat edintool bag 1
in thetrunk . To
ol bag cont ains:
R Jack
R Gloves
R Lugwr enc h
R Alignmen tbolt
R Folding choc k
R Ratche tfo rjac k 44
6
Wheels andtires

#
Place thera tche tont oth ehe xagon nutofthe
jac kso that theletter s"AB" arevisible. #
Tolowe rthe vehicl e:tur nth era tche tof the
jac kcou nter-clo ckwise. #
Tight enthewheel boltsevenlyin adi ag ona l
pa tter nin theor der indicat ed1 to5 with
a max imum of59 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 of96 lb-ft
(1 30 Nm) . &
WARNIN GRisk ofinju rythro ugh incor‐
re ct tigh tening torq ue
Th ewh eelscou ldcome looseifth ewheel
bolts orwheel nutsareno ttight ened tothe
pr escr ibed tighteningto rq ue. #
Makesur eth ewheel boltsorwheel
nuts aretight ened tothepr escr ibed
tight ening torq ue. #
Ifyo uar eno tsur e,do notmo vethe
ve hicle. Consult aqu alif ied spec ialist
wo rkshop andhave thetight ening tor‐
qu ech eckedimmediat ely. #
Chec kth etir epr essur eof thene wlymoun‐
te dwheel andadjus taccor dingly. #
Vehicl eswith tirepr ess urelos swa rning
sy stem: Restar tth etir epr essur eloss warn‐
ing system (/ page430).
Ex cep tion: thene wwheel isan emer gency
spa rewheel. #
Vehicl eswith atir epr ess uremonit oring
sy stem: Restar tth etir epr essur emonit oring
sy stem (/ page429).
Ex cep tion: thene wwheel isan emer gency
spa rewheel.
Mak esur eto obser vethefo llo wing further rela‐
te dsubjec t:
R Noteson tirepr essur e(/ page42 4) Emer
gency spar ewheel No
teson the emer 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. Mount‐
ing anemer gency sparewheel/ sparewheel
ma yse verely im pair thedr iving charact eris‐
tic s.
To preve nthazardous situa tions: 45
2
Whe elsand tires

#
Adaptyo ur drivin gst yle accor dinglyand
dr ive car efull y. #
Nevermount moreth 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 ®
. #
>Ha vetheemer 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 remo ving an
emerg encysparewhee l:
R Beforestow ing theemer gency sparewheel,
mak esur eth er eis no air leftin thetir e.
If neces sary,allo wtheair toescape.
R Torelease airfrom thetir e: remo vethe
va lve cap ofthetir e.
R Press down theme talinse rtin theva lve
using apoint edobje ct,e.g. apen. R
Screw theva lve cap ontoth eva lve.
R Stow thedef lated emer gency sparewheel in
th eemer gency sparewheel baginthetrunk
(/ page453).
Obser vethefo llo wing noteson installing an
emer gency sparewheel:
R Install theemer gency sparewheel whenitis
def lated (/ page45 0).
R Inflat eth eemer gency sparewheel afte r
ins talling it(/ page45 4).
The maxim umpermissib lespeed withan emer ‐
ge ncy sparewheel installed is50 mph
(80 km/ h).
Do noteq uip theemer gency sparewheel with
sn ow chains .
Re place theemer gency sparewheel afte rsix
ye arsat thelat est,re ga rdless ofwe ar.
% Ve
hicl eswith atir epr ess urelos swa rn‐
ing system: Ifan emer gency sparewheel is
ins talled thetir epr essur eloss warning sys‐
te m canno tfunction reliabl y.Onl yre star tth e
sy stem again when theemer gency spare
wheel hasbeen replaced withane wwheel. 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(/ page42 4)
R Tire and Loadi ngInfo rm atio nplacar d
(/ page43 1)
R Tire pressur eta ble (/ page425) Re
mo ving the eme rgency sparewheel The
deflated eme rgency sparewheel issecur ed
in theemer gency sparewheel baginthetrunk . #
Obser vetheinf ormation onmount ingtires
(/ page44 3). #
Open thetrunk . Wheels
andtires 453

Ov
ervie w ............................................. 362
We bsit e
Calling up............................................. 361
Wheel chang e
Lo we ring theve hicle ............................4 51
Mounting ane wwheel ..................... ... 450
Re mo ving awhee l..... ......................... .4 50
Re mo ving/ins talling hubcaps .............4 47
Wheel rotat ion .........................................4 45
Whee ls
Ca re <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 397
Ch ang inghubcap s<0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011001100110011001100110011> 447
Chec king.............................................4 22
Che cking thetir epr essur e(man‐
uall y)................................................... 426
Chec kingthetir epr essur e(tir epr es‐
sur emonit oring system) ......................4 28
Def initio ns....... ....................................440
DO T,Tire Identif ication Number (TIN)
..... .............................. .................... ......4 36
Flat tire ....... .............. ........................... 401
Ins talling .............................................. 450
Load index...........................................4 38
Load -bearing cap acity <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> 438Ma
ximu mtireload <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> .....437
Ma ximu mtirepr ess ure <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 437
MOExt endedtires <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> ......402
Noise <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> 422
No teson installing .............................. 443
Ov ervie wof tirelabel ing......................4 35
Re mo ving ............................................ 450
Re placing .................................... 443,44 7
Re star tin gth etir epr essur eloss
wa rning system .............................. ..... 430
Re star tin gth etir epr essur emonit or‐
ing system ...........................................4 29
Ro tating ........... ................................. ...445
Sel ectio n<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 443
Sno wch ains ........................................ 423
Spe edrating ........... .............................438
St or ing ............................................. ... 446
Te mp eratur egr ade .............................. 435
Ti re and Loadi ngInfo rm atio nplacar d.. 431
Ti re charact eristic s........................ ...... 438
Ti re pressur e(no tes) ........................ ... 424
Ti re pressur eloss warning system
(funct ion)............................................. 429
Ti re pressur emonit oring system
(funct ion)............................................. 427
Ti re pressur eta ble .......................... .... 425 Ti
re Qua lityGradi ng .......... ................... 435
Ti re size designation ............................4 38
TIREFIT kit....... ....................................403
Tr act ion grade .....................................4 35
Tr ead weargrade .................................4 35
Un usual handlingch aract eristic s........ 422
Wi -Fi........ .................................................283
Ov ervie w ....... ......................................283
Se tting ................................................. 284
Se tting upaho tspo t....... ..................... 285
Wi des cree nCo ckpit Instru men tDi s‐
pla y
Ins trum ent cluster ................................. 12
Wi ndo wcur tain airba g............................. 40
Wi ndo ws
see Side windo ws
Wi ndo ws(Car e).......................................3 97
Wi ndshield ............................................... 120
Re placing thewiper blades .................. 120
Wi ndshield
see Windsh ield
Wi ndshield washer fluid .........................4 64
No tes ................................................... 464 566
Index