2023 MERCEDES-BENZ A CLASS Owners Manual

#
Turn ratche t3 cloc kwiseuntil support2
sits com pletely on jacksuppor tpoint 1and
th ebase ofthejac klies evenlyon thegr ound. #
Turn ratche t3 until thetir eis raised amaxi-
mum of1.2 in(3 cm) from thegr ound. #
Loosen andremo vethewheel (/page319). RR
emo emo
ving awheel ving
awheel RR
eq eq
uir uir
ements: ements:
R The vehicle israised (/page317).
* NO NO
TE TE
Mer cedes- AMGvehicles #
Obser vetheno tesin theSupplement.
Yo ucould other wise failto recogn ize
dang ers. When
chang ingawheel, avoidappl ying anyfo rc e
to thebr ak ediscs, asthis could impair theleve lof
comf ortwhen braking. *
N NO O
TE TE
Damag eto thre adin gfrom dirton
wheel bolts #
Donotplace wheel boltsin sand oron a
dir tysur face. #
Unscr ew theupper mostwheel boltcom-
ple tely. #
Screw alignme ntbolt 1intoth eth re ad
ins tead ofthewheel bolt. #
Unscr ewthere mainin gwheel boltscom-
ple tely. #
Remo vethewheel and,ifnecessar y,stor eit in
th etrunk . #
Noteson remo vingan emer gency sparewheel
(/ page321). Ins
t Ins
tallin gane allin
gane wwheel w
wheel RR
eq eq
uir uir
emen ts: emen
ts:
R The wheel tobe chang edisremo vedand the
alig nme ntbolt isscr ewed in(/ page319).
* NO NO
TE TE
Mer cedes- AMGvehicles #
Obser vetheno tesin theSupplement.
Yo ucould other wise failto recogn ize
dang ers. &
W W
AR NIN G AR
NIN GRisk ofacciden tfr om losin ga
wheel
Oiled, greased ordamag edwheel bolt/wheel
nut thre ads orwheel hub/wheel mounting
bolt thre ads can cause thewheel bolts/wheel
nuts tocome loose.
As are sult ,yo ucould loseawheel whiledriv-
ing. #
Neveroil orgrease theth re ads. Wheel
sand tires
319 319

#
Intheev ent ofdamag eto theth re ads,
cont actaqu ali/ed special istwo rkshop
immed iately. #
Have thedamag edwheel boltsordam-
ag ed hub thre ads replaced. #
Donotcontinu edr iving . #
Obser vetheinf ormation onthech oice oftires
(/ page311).
Fo rtir es withaspeci/ eddirection ofrotation, an
ar ro w on theside wallof thetir eindicat esthecor -
re ct directio nof rotation. Observe thedir ection of
ro tation wheninst alling. #
Slide thewheel tobe mount edont oth ealign-
ment boltandpush iton. #
Obser vetheno teson installing anemer gency
spa rewheel (/page321) . &
W W
AR NIN G AR
NIN GRisk ofinjuryfrom tighteni ng
wheel boltsand nuts
If yo utight enthewheel boltsorwheel nuts
when theve hicle israised, thejac kcould tip. #
Onlytight enwheel boltsorwheel nuts
when theve hicle ison thegr ound. #
Obser vetheinst ruction sand safetyno teson
"Chang ingawheel" (/page311) . #
Forsaf etyre asons, onlyuse wheel boltswhic h
ha ve been approved byMer cedes-Be nzand
fo rth ewheel inqu estion .
* N NO O
TE TE
Damag eto paintw orkof thewheel
ri m when screwing inthe/r st wheel bolt If
th ewheel hastoomuc hpla ywhen screwing
in the/r st wheel bolt,th ewheel rim paint can
be damag ed. #
Press thewheel /rml yag ainst thewheel
hub when screwing inthe/r st wheel
bolt. #
Tight enthewheel boltsevenl yin adiagonal
patt ernin theor der indicat eduntil they are
/ng er-tight . #
Unscr ew and remo vethealignment bolt. #
Tight enthelast wheel boltuntil itis /n ger-
tigh t. #
Lowe rth eve hicle (/page320). Lo
w Lo
wer er
ing t ing
the v he
vehicle ehicle
aTer aTer
awheel c a
wheel chang e hang
e RR
eq eq
uir uir
emen ts: emen
ts:
R The newwheel hasbeen installed
(/ page319). #
T T
o low o
lower t er
the v he
vehicle: ehicle:
placethera tche tont o
th ehe xagon nutofthejac kso that theletter s
"AB" arevisible andturncount er-cloc kwise. 320320
Wheels
andtires

#
Tight enthewheel boltsevenl yin adiagonal
patt ernin theor der indicat ed1 to5 with
an initial maximum forc eof 59 lb-T (80Nm). #
Tight enthewheel boltsevenl yin adiagonal
patt ernin theor der indicat ed1 to5 with
th especi/ed tightening torq ue of96 lb-T
(1 30 Nm) . &
W W
AR NIN G AR
NIN GRisk ofacc iden tdu eto incor -
re ct tightenin gto rq ue
Th ewheels couldcome looseifth ewheel
bolts orwheel nutsareno ttight ened tothe
pr escr ibed torq ue . #
Ensur eth at thewheel boltsorwheel
nuts aretight ened tothepr escr ibed
tight ening torq ue . #
Ifyo uar eno tsur e,do notmo vetheve hi-
cle. Contact aqu ali/ed special istwo rk-
shop andhave thetight ening torq ue
ch eckedimmediat ely. #
Chec kth etir epr essur eof thene wly installed
wheel andadjust itifnecessar y. %
The follo wing does notappl yif th ene wwheel
is an emer gency sparewheel. #
V V
ehicle swit ehicle
swit htir h
tir epr e
pr essur essur
eloss w e
loss war ar
nin gsy nin
gsy s- s-
t t
em: em:
Restar tth etir epr essur eloss warning
sy stem (/ page299). #
V V
ehicles wit ehicles
withatir h
atir epr e
pr essur essur
emonit e
monit or or
ing sy ing
sys- s-
t t
em: em:
Restar tth etir epr essur emonit oring sys-
te m (/ page298). Emer
g Emer
gency spar ency
sparewheel e
wheel NNo o
t t
es on t es
on the emer g he
emer gency spar ency
sparewheel e
wheel &
W W
ARNIN G ARNIN
GRisk ofaccident causedby
incor rect wheel andtiredimen sions
The wheel ortiresizes andthetir etype ofthe
emer gency sparewheel orspar ewheel and
th ewheel tobe replaced maydi.er .The emer -
ge ncy sparewheel orspar ewheel cansigni/-
cantl yim pair drivi ng charact eristics ofthe
ve hicle.
To prev ent hazar dous situations: #
Drive car efull y. #
Neverinst allmor eth an one emer gency
spa rewheel orspar ewheel that di.er s
in size . #
Onlyuse anemer gency sparewheel or
spar ewheel brie0y . #
Donotdeacti vate ESP ®
. #
Have theemer gency sparewheel or
spar ewheel ofadi.er entsize replaced
at thenear estquali/ed special istwo rk-
shop. Thenewwheel mustha ve thecor -
re ct dimen sions. %
The emer gency sparewheel issecur edinthe
emer gency sparewheel baginthetrunk .
Obser vethefo llo wing noteson remo vingan emer -
ge ncy sparewheel:
R Beforestow ing theemer gency sparewheel,
mak esur eth er eis no airleT inthetir e.
If necessar y,allo wtheair toescape.
R T T
o r o
release airfr elease
airfrom t om
the tir he
tire: e:
remo vetheva lve
cap ofthetir e.
R Press down theme talinser tin theva lve using
a point edobject, e.g.apen. Wheels
andtires
321 321

R
Screw theva lve cap ontoth eva lve.
Obser vethefo llo wing noteson installing anemer -
ge ncy sparewheel:
R The maximum permissibl espeed withan
emer gency sparewheel installed is50 mph
(80 km/h ).
R Donoteq uip theemer gency sparewheel with
sno wch ains.
R Replace theemer gency sparewheel aTersix
ye arsat thelat est, rega rdless ofwe ar.
R Chec kth etir epr essur eof theemer gency
spa rewheel installed. Correct thepr essur eas
necessar y.
% The speci/ed tirepr ess ureis stat ed on the
label oftheemer gency sparewheel.
% V V
ehicle swit ehicle
swit hatir h
atir epr e
pr essur essur
eloss w e
loss war ar
nin gsy nin
gsy s- s-
t t
em: em:
Ifan emer gency sparewheel isinst alled,
th etir epr essur eloss warning system canno t
function reliabl y.Onl yre star tth esy stem
ag ain when theemer gency sparewheel has
been replaced withane wwheel.
V V
ehicles wit ehicles
withatir h
atir epr e
pr essur essur
emonit e
monit or or
ing sy ing
sys- s-
t t
em: em:
Ifan emer gency sparewheel isinst alled, th
etir epr essur emonit oring system canno t
function reliabl y.Fo ra few minut esaTer an
emer gency sparewheel isins talled, thesy s-
te m ma yst ill displa yth etir epr essur eof the
re mo vedwheel. Onlyre star tth esy stem again
when theemer gency sparewheel hasbeen
re placed withane wwheel.
Be sureto also obser vethefo llo wing further rela-
te dsubjects:
R Noteson tirepr essur e(/ page293)
R Tire and Loadi ngInformatio nplacar d
(/ page300)
R Tire pressur eta ble (/ page295)
R Noteson installing tires (/ page311)
R Inst alling anemer gency sparewheel
(/ page316) In0at
ing In0at
ingt t
he emer g he
emer gency spar ency
sparewheel e
wheel *
N NO O
TE TE
Overheatin gdue tothetir ein0 ation
com pressor running toolong #
Donotru nth etir ein0 ation compressor
fo rlong erthan tenminut eswithou tint er-
ru ption. RR
eq eq
uir uir
ements: ements:
Com plywit hth emanuf acturer'ssafetyno teson
th estic kerof theemer gency sparewheel andon
th etir ein0 ation compressor . #
Remo vethestic kerwit hth elabel 50mph
(80 km/h )fro mthetir ein0 ation compressor
housing anda1x itto theinst rument cluster
wit hin thedr iver's /eld ofvision. #
Remo vethetir ein0 ation compressor from the
st or ag ewe llunder thetrunk 0oor
(/ page275). 322322
Wheels
andtires

#
Pull /ller hose 1 and plug3 out ofthetir e
in0 ation compressor housing. #
Inser tplug 7of/ller hose 1inthesoc ket
on thetir ein0 ation compressor andthen turn
it until plug7engages. #
Unscr ewthecap from theva lve on theemer -
ge ncy sparewheel. #
Screw union nut2of/ller hose 1onto
va lve. #
Mak esur eon and o.switc h4 ofthetir e
in0 ation compressor isse tto 0 0
. #
Inser tplug 3inasoc ketin your vehicle.
R 12Vsoc ket(/ page107) R
Obs erve theno teson soc kets (/ page107) . #
Press thestar t/s topbutt ononce toswitc hon
th epo we rsuppl y(/ page128). #
Press onand o.switc h4 onthetir ein0 ation
com pressor toI I
.
The tirein0a tio nco mpr esso ris swi tche don .
The tireis in0a ted. The tirepr essur eis sho wn
on manome ter5. #
Pum pth etir eto thespeci/ed tirepr essur e.
% The speci/ed tirepr essur eis stat ed on the
label oftheemer gency sparewheel. #
When thespeci/ed tirepr essur ehas been
re ac hed, press onand o.switc h4 onthe
tir ein0 ation com press orto0 0
.
The tirein0a tio nco mpr esso ris swi tche do.. #
Press thestar t/s topbutt ontoswitc ho. the
po we rsuppl y. #
Ifth etir epr essur eis higher than thespeci/ed
pr essur e,press pressur ere lease valve butt on
6 until thecor rect tirepr essur ehas been
re ac hed. #
Unscr ew union nut2of/ller hose 1from
th eva lve. #
Screw theva lve cap oftheemer gency spare
wheel ontoth eva lve ag ain. #
Store/ller hose 1and plug 3inthelowe r
secti onofthetir ein0 ation compressor hous-
ing. #
Storeth etir ein0 ation compressor intheve hi-
cle. Wheel
sand tires
323 323

NN
o o
t t
es on t es
on tec ec
hnical data hnical
data
* NO NO
TE TE
Mer cedes- AMGvehicles #
Obser vetheno tesin theSupplement.
Yo ucould other wise failto recogn ize
dang ers. The
datast at ed onlyapplies tovehicles with
st andar deq uipme nt.Yo ucan obtain further infor-
mation from anaut hor ized Mercedes-Benz Cen-
te r. VV
ehicle electr ehicle
electronics onics
TT
w w
o-w a o-w
ay r y
radios adios
NNo o
t t
es on inst es
on inst alling tw alling
two-w a o-w
ay r y
radios adios
&
W W
ARNIN G ARNIN
GRisk ofaccident dueto
im proper workon two-w ayradios
If tw o-w ayradios aremanipulat edorretro/t-
te dincor rectl y,theelectr omagne ticradiation
fr om thetw o-w ayradios caninterfere wit hth e
ve hicle electronics andjeop ardize theoper at-
ing safetyof theve hicle. #
Youshould have all workon electr ical
and electr oniccomponent scar ried out
at aqu ali/ed special istwo rkshop. &
W W
AR NIN G AR
NIN GRisk ofacciden tdue to
im proper operation oftwo-w ayradios
If yo uuse two-w ayradios intheve hicle
im proper ly,th eir electr omagne ticradiation
can disruptth eve hicle' select ronics .This is
th ecase inthefo llo wing situations, inpar ticu-
lar :
R The two-w ayradio isno tconnect edtoan
ex terior ant enna.
R The exterior ant enna isins talled incor -
re ctl yor isno ta low- re0ectio nant enna.
Thi scou ldjeopar dizeth eoper ating safetyof
th eve hicle. #
Have thelow- re0ectio nex terior ant enna
ins talled ataqu ali/ed special istwo rk-
shop. #
When operatingtw o-w ayradios inthe
ve hicle, alwaysconn ectthem tothelow-
re 0ectio nex terior ant enna. *
N NO O
TE TE
Inva lidation oftheoper ating permit
due tofailur eto com plywit hth einst ruc-
tion sfo rinst allation anduse The
oper ating permit maybe inva lidat edifth e
inst ruction sfo rinst allation anduseoftwo-w ay
ra dios areno tobser ved. #
Onlyuse appr ovedfreq uency bands. #
Obser vethemaximum permissible out-
put powe rin these freq uency bands. #
Onlyuse appr ovedant enna positions. 324324
Te
ch nica ldat a

1
Front roof area
2 Rear roof area
3 Rear fender s
4 Trunk lid
On vehicles withapanor amicslidingsunr oof,
ins talling anant enna tothefront orrear roof area
is no tper mitt ed. On
there ar fender s,itis recommen dedthat you
inst alltheant enna ontheside oftheve hicle clos-
es tto thecent erofthero ad.
Use Tech nica lSp eci /cation ISO/T S2160 9(R oad
Ve hicles –"EMC sfo rinst allation ofaTer market
ra dio freq uency transmittin gequipment") when
re tro/tti ngtwo-wa yra dios. Complywit hth eleg al
re qu irements forde tach able parts.
If yo ur vehicle hasinstalling fortw o-w ayradio
eq uipment, usethepo we rsuppl yand antenna
connect orspr ov ided inthepr e-ins tallation.
Obser vethemanuf acturer'ssupplements when
inst alling.
T T
w w
o-w a o-w
ay r y
radio tr adio
transmission output ansmission
output
The maximum transmission output(PEAK) atthe
base oftheant enna must notex ceed theva lues in
th efo llo wing table. F F
r r
eq eq
uency bandandmaximum tr uency
bandandmaximum transmission out- ansmission
out-
put put
FF
r r
eq eq
uency band uency
band Maximumtr Maximum
transmis- ansmis-
sion output sion
output
Shor twa ve
3 -54 MHz 100
W
4 m freq uency band
74 -88 MHz 30
W
2 m freq uency band
144 -174 MHz 50
W
Te rrestr ialTrunk ed
Ra dio (TETRA )
380 -460 MHz 10
W
70 cm freq uency band
420 -450 MHz 35
W
Tw o-w ayradio
(2G/3G/4G) 10
W Te
ch nica ldat a
325 325

The
follo wing canbeused intheve hicle without
re str iction s:
R Two-w ayradios withamaximum transmission
output ofup to100 mW
R RFtransmitt erswit htransmitt erfreq uencies in
th e380 -410 MHz freq uency bandanda
maximum transmission outputofup to2W
(TETRA)
R Mobile phones (2G/3G/4G)
Ther ear eno restr iction swh en position ing the
ant enn aon theoutside oftheve hicle forth efo l-
lo wing freq uency bands:
R Terrestr ialTrunk edRadio (TETRA )
R 70cm freq uency band
R 2G/3G/4G RR
egulat egulat
or or
yr y
radio adio
identi/ cation identi/
cation andnot and
notes es
RR
egulat egulat
or or
yr y
radio adio
identi/ cation identi/
cation ofsmall com of
small compo- po-
nent s nent
s Manuf
acturerinformation aboutradio-based vehi-
cle com pone ntscan befound using theke y
phr ase "Regulat oryra dio identi/ cation"in theDig- it
al Oper ator's Manual intheve hicle, ontheInt er-
ne tand intheapp. RR
egulat egulat
or or
yr y
radio adio
ident i/cation ident
i/cation–Indonesia –
Indonesia Manuf
acturerinformation aboutradio-based vehi-
cle com pone ntscan befound using theke y
phr ase "Regulat oryra dio identi/ cation –Indone-
sia" intheDigit alOper ator's Manual intheve hi-
cle, ontheInt erne tand intheapp.
% These areno tsmall components. Information
about smallcomponents canbefound using
th eke yphr ase "Reg ulat oryra dio identi/ cation
of small component s". InfInf
or or
mation oninst mation
oninstallation clear allation
clearances ances
Inf
ormation oninstallation clearances ofwir eless
ve hicle compone ntscan befound using theke y
phr ase "Inst allation clearances" intheDigit al
Oper ator's Manual intheve hicle, ontheInt erne t,
and intheapp. FF
ur t ur
ther her
com com
ponen t-speci/c ponen
t-speci/c inf inf
or or
mation mation
Fu
rther com ponent-speci/c informatio ncan be
fo und using theke yphr ase "fur ther com ponen t-
speci/c information" intheDigit alOper ator's
Manual intheve hicle, ontheInt erne tand inthe
app. 326326
Te
ch nica ldat a