MERCEDES-BENZ A CLASS 2023 Repair Manual

#
Alwaysloc kre ar seat backres ts aTer
ins talling TopTe ther belts. #
Obser vetheloc kve ri/catio nindic ator . If
th ere ar seat backres tis no teng aged and
loc kedin place, there dloc kve ri/catio nindic ator
wil lbe visib le.
¯ Ifth ech ild restr aint system iseq uipp ed
wi th aTo pTe ther belt:
The risk ofinjuryma ybe reduced byTop
Te ther.The TopTe ther belt enables an
additional connection between thech ild
re str aint system atta ch ed withLA TC H-ty pe
(I SOFI X)(leT and right rear seats) orthe
seat belt(allrear seats) andtheve hicle. #
Foldup cover2 ofTopTe ther anc horage3.
V V
ehicles wit ehicles
withadjust h
adjust ablehead r able
head res estr tr
aints: aints:
#
Ifnecessar y,slide head restr aint 1 upwa rds
( / pag e94). #
Guide TopTe ther belt 4under headrestr aint
1 betwee nth etw ohead restr aint bars.
V V
ehicles wit ehicles
without adjust hout
adjust ablehead r able
head res estr tr
aints: aints:
#
TopTe ther belt withone seat beltstrap: guide
To pTe ther belt 4overth ecent erofhead
re str aint 1.
or #
TopTe ther belt withtw oseat beltstraps: guide
one TopTe ther belt 4past head restr aint 1
on theright and leTsides respect ivel y.
All v All
vehi cles: ehi
cles: #
Inst alltheLA TC H-ty pe(ISOFI X)or bel t-
se cur edchild restr aint system with TopTe ther.
In doing so,com plywit hth ech ild restr aint
sy stem manufac ture r's inst allation instruc-
tion s. Occupant
safety
59 59

#
Hook TopTe ther hook 5ofTopTe ther belt
4 intoTo pTe ther anc horage3 without
twistin g. #
Tensio nTo pTe ther belt 4.Indoing so,com-
pl ywit hth ech ild restr aint system manufac tur-
er's installation instruction s. #
Folddo wn cover2 ofTopTe ther anc horage
3.
V V
ehicles wit ehicles
withadjust h
adjust ablehead r able
head res estr tr
aints: aints:
#
Ifnecessar y,slide head restr aint 1 down -
wa rds(/ page94). Makesur eth at youdo
no tint erfere wit hth ecor rect routing ofTop
Te ther belt 4. SecurSecur
ingt ing
the c he
child r hild
res estr tr
aint syst aint
system wit em
witht h
the seat he
seat
belt belt
SecurSecur
ingt ing
the c he
child r hild
res estr tr
aint syst aint
system wit em
witht h
the seat he
seat
belt ont belt
onthe r he
rear seat ear
seat &
W W
ARNIN G ARNIN
GRisk ofaccident ifth ere ar
ben chseat, rear seat andseat backres t
ar eno teng aged
The rear ben chseat, rear seat andseat back-
re st ma yfo ld forw ards, even when youar e
dr iving.
R Asare sult ,th eve hicle occupan twill be
pushed intoth eseat beltwithincr eased
fo rc e. The seat beltwillnotbe able topro-
te ct as intende dand could cause addi-
tion alinj ury.
R Objects orloads inthetrunk orcar go
com partment willnotbe restr ained bythe
seat backres t. #
Mak esur eth at there ar ben chseat, the
re ar seat andtheseat backrest are
eng aged bef oreev erytrip. If
th ere ar seat backres tis no teng aged and
loc kedin place, there dloc kve ri/catio nindic ator
wil lbe visib le.
Whe ninst Wh
eninst alling abe lt-s ec ur al
ling abe lt-s ec ured c ed
chi ld r hi
ld res est
r tr
ai nt sy ai
nt sys- s-
t t
em ,ob serv em,
obser ve t e
the f he
follo ollo
wing: wing:
0073 Alwayscom plywit hth emanuf acturer's
inst allation andoper ating instructions forth e
ch ild restr aint system used .
0073 Alsose cu re TopTe ther ifpr esent
(/ page58).
0073 When usingaw When
usingaweight cat eight
categor egor
y0/0+ bab y
0/0+ baby y
car seat andaw car
seat andaweight cat eight
categor egor
yIr y
Irear w ear
war ar
d- d-
f f
acing c acing
child r hild
res estr tr
aint syst aint
system onar em
onarear seat ear
seat : :
adjust thefront seat sothat theseat does
no tto uc hth ech ild restr aint system .
0073 Whenusing aw Wh
enusing awei gh tca t ei
gh tca teg or eg
oryIf y
Ifor w or
war ar
d- d-
f f
acin gc acin
gchild r hild
res es
tr tr
ain tsy st ai
nt system : em
:re mo vethe
head restr aint from there spect ive seat, if
possibl e.
ATer thech ild restr aint system hasbe en
re mo ved, replace thehead restr aint imme di-
at elyand adjustall head restr aints correctl y. 6060
Occupa
ntsaf ety

0073
Thebackrest ofthefo rw ard-f acing child
re str aint system must,asfaras possible, be
re sti ng on theseat backrest ofthere ar seat.
0073 Ifth ehead restr aint ofthech ild seat canno t
be fullyex tended when itis inst alled inthe
ve hicle, this will result inrestr iction son the
maximum sizesettin gfo rch ild restr aint sys-
te ms inwe ight categor yII or III.
Cont actwithth ero of when thehead
re str aint isful lyex tended andlockedin place
will notre sult inanyre str iction son use.
0073 Thech ild restr aint system mustnotbe put
und erstr ain be twee nth ero of and theseat
cushion and/orbeinst alled facing thewr ong
dir ection. Wherepossible, adjusttheseat
cushion inclination accordingly.
0073 Thechild restr aint system mustno tbe put
und erstr ain by thehead restr aint. Adjust the
head restr aints asappropr iate .
0073 Makesur eth at thech ild's feet do notto uc h
th efront seat. Ifnecessar y,mo vethefront
seat slightl yfo rw ards. The
seat beltson thefo llo wing seats areeq uipped
wit haspecia lseatbelt retract or:
R Front passeng erseat
R Rear seats
When enabled,thespecial seatbelt retract or
ensur esthat theseat belts ofthefront passeng er
seat andrear seats donotslac kenonce thech ild
re str aint system isse cu red(/ page56). #
Inst allthech ild restr aint system .
Th eent ire ba se ofthech ild restr aint system
mu stalwa ys rest on theseat surface ofthe
re ar seat. #
Alwaysmak esur eth at theshoulder beltstrap
is cor rectl yro uted from theseat beltoutle tof
th eve hicle totheshoulder beltguide onthe
ch ild restr aint system .
Th esh ou lder beltstr ap mu stbe routed
fo rw ardfrom theseat beltoutle t. N No o
t t
es on r es
on rear w ear
war ar
d-f d-f
acing andf acing
andfor w or
war ar
d-f d-f
acing c acing
child hild
r r
es estr tr
aint syst aint
systems ont ems
onthe fr he
front passeng ont
passeng erseat er
seat &
W W
ARNIN G ARNIN
GRisk ofinjur yor fata linjur y
when usingare ar wa rd-faci ng child
re str aint system while th eco-dr iver airbag
is enabled
If yo usecur each ild inare ar wa rd-faci ng child
re str aint system ontheco-dr iver seat andthe
PA SSENGE RAIR BA GOF Find icat or lamp is
o., theco-dr iver airbag candeplo yin the
eve ntofan accid ent.
The child could bestruckby theairbag. #
Alwaysensu rethat theco-dr iver airbag is
disabled. ThePASSENGE RAIR BA GOF F
ind icat or lamp must belit. #
NEVER useare ar wa rd-faci ng child
re str aint system onase at with an ENA -
BL ED FRONT AIRBAG; DEA THorSER I-
OUS INJUR Yto theCHILD canoccur . Obser
vethespeci/c instruction sfo rth ere ar-
wa rd-faci ng and forw ard-f acing child restr aint sys-
te ms (/ page62) . Occupant
safety
61 61

Alw
aysobser vethestatus ofthefront passeng er
airbag onthePA SSENGE RAIR BA GOF Find icat or
la mp :
R When usingare ar wa rd-faci ng child restr aint
sy stem onthefront passeng erseat, thefront
passeng erairbag mustalwaysbe disable d.
This isonl yth ecase ifth ePA SSENGE RAIR
BA GOF Find icat or lamp islit continuousl y
(/ page47).
R Ifth ePA SSENGE RAIR BA GOF Find icat or
la mp iso., thefront passeng erairbag isena-
bled. Thefront passeng erairbag maydeplo y
dur ing anaccident.
Secur Secur
ingt ing
the c he
child r hild
res estr tr
aint syst aint
system wit em
witht h
the seat he
seat
belt ont belt
onthe fr he
front passeng ont
passeng erseat er
seat
When installing abelt-secur edchild restr aint sys-
te m on thefront passeng erseat, alwaysobser ve
th efo llo wing:
0073 Obser vetheno teson rear wa rd-faci ng and
fo rw ard-f acing child restr aint system son the
front passeng erseat (/ page 61).
0073 Obser vethech ild restr aint system manufac -
tu re r's inst allation andoper ating instruction s. 0073
When usingafo rw ard-f acing child restr aint
sy stem inwe ight categor yI: re mo vethehead
re str aint from there specti veseat, ifpossibl e.
ATer thech ild restr aint system hasbe en
re mo ved, replace thehead restr aint imme di-
at elyand adjustall head restr aints correctl y.
0073 Thebackrest ofthefo rw ard-f acing child
re str aint system must,asfaras possible, be
re sti ng on theseat backrest ofthefront
passeng erseat.
0073 Ifth ehead restr aint ofthech ild seat canno t
be fullyex tended when itis inst alled inthe
ve hicle, this will result inrestr iction son the
maximum sizesettin gfo rch ild restr aint sys-
te ms inwe ight categor yII or III.
Cont actwithth ero of when thehead
re str aint isful lyex tended andlockedin place
will notre sult inanyre str iction son use.
0073 Thech ild restr aint system mustno tbe put
und erstra in be tween thero of and theseat
cushion and/orbeinst alled facing thewr ong
dir ection. 0073
Thechild restr aint system mustno tbe put
und erstra in by thehead restr aint. Adjust the
head restr aints asappropr iate .
0073 Neverplace objects (e.g.cushions) underor
behind thech ild restr aint system .
Th ese at belton thefront passeng erside iseq uip-
ped withaspecial seatbelt retract or.
When enabled,thespecial seatbelt retract or
ensures that theseat beltdoes notslac kenonce
th ech ild seat issecur ed(/ page56). &
W W
ARNIN G ARNIN
GRisk ofinjur yor deat hdue to
objects between theseat surface and the
ch ild restr aint system
Ob jec tsbetwee nth eseat surface and the
ch ild restr aint system could a. ectth efunction
of theaut omatic front passeng erairbag shut-
o.. #
Donotplace anyobjects between the
seat surface and thech ild restr aint sys-
te m. #
Alwaysmak esur eth at thech ild restr aint
sy stem isco rrectl yinst alled. 6262
Occupant
safety

#
Setth efront passeng erseat asfarbac kas
possible andmovetheseat intoth ehighest
position ifpossible. #
Adjust theseat cushion inclination sothat the
fr ont edge oftheseat cushion isin thehighest
position andthere ar edg eof theseat cushion
is in thelowe stpo sition . #
Setth eseat backrest tothemost vertical
position possible. #
Inst allthech ild restr aint system .
Th eent ire ba se ofthech ild restr aint system
mu stalwa ys rest on thesitting surface ofthe
fr ont passeng erseat. #
Alwaysmak esur eth at theshoulder beltstrap
is cor rectl yro uted from theseat beltoutle tof
th eve hicle totheshoulder beltguide onthe
ch ild restr aint system .
Th esh ou lder beltstr ap mu stbe routed for-
wa rdsand down wardsfrom theseat beltout-
le t. #
Ifnecessar y,adju stthefront passeng erseat
accor dingly. Child-prChild-pr
ooflocks oof
locks AA
ctiv ctiv
atin gor deactiv atin
gor deactiv atingt atin
gthe c he
child safe hild
safety loc ty
loc kf k
for or
t t
he r he
rear door s ear
door s &
W W
AR NIN G AR
NIN GRisk ofacciden tand injurydue
to childr enleT unatt ended intheve hicle
If ch ildr enareleT unsuper visedintheve hicle,
th ey could, inpar ticul ar:
R open doors,ther eb yendang ering other
per sons orroad user s.
R getout and bestruckby oncoming tra1c.
R oper ateve hicle equipme ntand become
tr apped, forex am ple.
In addit ion,th ech ildr encould alsosetth e
ve hicle inmo tion ,fo rex am ple by:
R releasing thepar king brak e.
R chang ingthetransmission position.
R star ting theve hicle. #
Neverlea vechildr enunatt ended inthe
ve hicle. #
When leavingth eve hicle, alwaysta ke the
Sma rtKe ywit hyo uand lockth eve hicle. #
Keep theve hicle SmartKey out ofreac h
of childr en. &
W W
ARNIN G ARNIN
GRisk offata linjur ydue toexpo-
sur eto extreme heator cold intheve hicle
If per sons, particu larlych ildr en, aresubject ed
to prolong edexposur eto intense heatorcold,
th er eis arisk ofsevere injur yor even deat h. #
Neverlea veper sons, particular lych il-
dr en, unatt ended intheve hicle. &
W W
AR NIN G AR
NIN GRisk ofacciden tand injurydue
to childr enleT unatt ended intheve hicle
If ch ildr enaretrav eling intheve hicle, they
could, inpar ticul ar:
R Open doors,ther eb yendang ering other
per sons orroad user s.
R Getout and bestru ck byoncoming tra1c.
R Oper ateve hicle equipme ntand become
tr apped, forex am ple. Occupan
tsaf ety
63 63

#
Alwaysactiv ateth einst alled child safety
loc ksifch ildr enaretrav eling intheve hi-
cle. #
Neverlea vechildr enunatt ended inthe
ve hicle. #
When leavingth eve hicle, alwaysta ke the
Sma rtKe ywit hyo uand lockth eve hicle. Ther
ear ech ild safetyloc ksforth ere ar door sand
th ere ar side windows.
The child safetyloc kon there ar door ssecur es
eac hdoor separ ately. The doorscan nolong erbe
open edfrom theinside. #
Press theleve rin dir ection 1(activ ate) or 2
(deactiv ate). #
Mak esur eth at thech ild safetyloc ksarewo rk-
ing proper ly. A A
ctiv ctiv
atin gand deactiv atin
gand deactiv atingt atin
gthe c he
child safe hild
safety loc k ty
loc k
f f
or t or
the r he
rear side windo ws ear
side windo ws #
T T
o activ o
activ at at
e/deactiv e/deactiv
at at
e: e:
press button2.
The rear side windowcan beopen edorclosed
in thefo llo wing cases :
R indicat orlam p1 islit: via theswitc hon
th edr iver's door 6464
Occupant
safety

R
indicat orlam p1 iso.: viatheswitc hon
th ecor respond ingrear door ordriver's
door NNo o
t t
es on pe es
on pets int ts
inthe v he
vehicle ehicle
&
W W
AR NIN G AR
NIN GRisk ofacciden tand injurydue
to anim alsleT unse curedorunat tended in
th eve hicle
If yo ulea veanim alsintheve hicle unattended
or unse cured, they could possibl ypr ess but-
to ns orswitches .
An anim alma y:
R Activateve hicle equipme ntand become
tr apped, forex am ple
R Switchsy stems onoro. and endanger
ot her roadus ers
Uns ecured animalsmaybe thro wn aroun din
th eve hicle intheev ent ofan accident orsud-
den steer ing and braking maneuv ersand
injur eve hicle occupan tsinthepr ocess. #
Neverlea veanim alsintheve hicle unat-
te nded . #
Alwayscor rectl ysecur eanimals while
dr ivi ng ,e.g .using asuit able animal car-
ri er . Occupant
safety
65 65

Sma
r Sma
rtK ey tK
ey OvOv
er er
vie vie
wof ke w
of keyfu nct ions y
fu nct ions &
W W
AR NIN G AR
NIN GRisk ofaccid entand inju ry due
to childr enleT unatt ended intheve hicle
If ch ildr enareleT unsuper visedintheve hicle,
th ey could, inpar ticul ar:
R open doors,ther eb yendang ering other
per sons orroad user s.
R getout and bestruckby oncoming tra1c.
R oper ateve hicle equipme ntand become
tr apped, forex am ple.
In addit ion,th ech ildr encould alsosetth e
ve hicle inmo tion ,fo rex am ple by:
R releasing thepar king brak e.
R chang ingthetransmission position.
R star ting theve hicle. #
Neverlea vechildr enunatt ended inthe
ve hicle. #
When leavingth eve hicle, alwaysta ke the
Sma rtKe ywit hyo uand lockth eve hicle. #
Keep theve hicle SmartKey out ofreac h
of childr en. *
N NO O
TE TE
Damag eto theSmar tKey caused by
magne tic/elds #
Keep theSmar tKey awa yfrom strong
ma gne tic /eld s. Ve
hicle SmartKey wit hpani calar m
1 Locks
2 Indicatorlam p 3
Unloc ks
4 Opens thetrunk lid
5 Panic alarm
% Ifind icat orlam p2 does notlig ht up aTer
pr essin gth eÜ orß button,thebatt ery
is we ak orpossibl ydisc harged. Re place the
batt eryas soon aspossible.
Re place theke ybatt ery(/ page68).
The keyloc ksand unlocks thefo llo wing compo-
nents:
R Door s
R Fuel/ller 0ap
R Trunk lid
If th eve hicle isno topen edwithin appr oximat ely
40 seconds aTerunloc king,itloc ksagain. Anti-
th eT protection isactiv ated again.
Do notke ep theke yto get her with elect ronic devi-
ces orme talobjects. Thiscana.ec tth eke y's
fu nct ionality. 6666
Opening
andclosing

AA
ctiv ctiv
atin g/deactiv atin
g/deactiv atingt atin
gthe acous he
acous ticloc tic
locking king
v v
er er
i/- i/-
cation cation
signal sign
al Mul
timed iasystem:
4 © 5
Settings 5
Vehi cle #
Activateor deac tivateAco ustic Lock. ArAr
ming/dis ar ming/dis
arming t ming
the panic alarm he
pani calar m RR
eq eq
uir uir
emen ts: emen
ts:
R The vehicle isswitc hedo.. #
T T
o activ o
activ at at
e: e:
press button1 forappr oximat ely
one second.
A visual andaudible alarmistrigg ered. #
T T
o deactiv o
deactiv at at
e: e:
brie0y press button1 again.
or #
Press thestar t/s topbutt on.
A Smar tKey belongin gto theve hicle mustbe
de tected intheve hicle. Chang
ingt Chang
ingthe unloc he
unlocking se king
setting s tti
ng s Po
ssible unlocking funct ionsof theSmar tKey :
R Centr alunloc king
R Unloc kingthedr iver's door andfuel/ller 0ap #
T T
o switc o
switc hbe h
be tw tw
een se een
setting s: tting
s:press theÜ
and ß buttons simult aneousl yfo rappr ox-
imat elysix seconds untiltheindicat orlam p
0ash estwice.
Op tions ifth eunloc kingfunction forth edr iver's
door andfuel/ller 0aphasbeen select ed:
R T T
o unloc o
unloc kt k
the v he
vehicle centr ehicle
centrally all
y: :
pr ess the
Ü buttontwice.
R V V
ehicles wit ehicles
withKEYLES S-GO: h
KEYLES S-GO:ifyo uto uc hth e
inner surface ofthedoor handle onthedr iv-
er's door ,onl yth edr iver's door andthefuel
/ller 0apareunloc ked. DeactivDeactiv
atingt ating
the fun ction oft he
fun ction ofthe Smar he
Smar tKey tK
ey VV
ehicles wit ehicles
withKEYLESS -GO: h
KEYLESS -GO:ifyo udeactiv ateth e
func tionof theSmar tKey ,th eKEYLESS -GOfunc-
tions arealso deactiv ated. Access ordrive aut hor -
izat ion byKEY LESS-G Oisthen no long erpossible
wit hth at par ticu larSmar tKey .Ac tivateth efunc-
tion oftheSmar tKey so that all its funct ionswill
ag ain beavailabl e.
Yo ucan also deactiv ateth efunction oftheSmar t-
Ke yto reduce theener gyconsum ption ofthe
Sma rtKe yif yo udo notuse theve hicle oraSmar t-
Ke yfo ran extended period oftime . #
T T
o dea ctiv o
dea ctivat at
e: e:
press theß buttononthe
Sma rtKe ytwi ce inqu ick succes sion.
The Smar tKey indicat orlam p0as hes twice
br ie0y andlights uponce. #
T T
o activ o
activ at at
e: e:
press anybutt onontheSmar tKey .
% When theve hicle isstar tedwit hth eSmar tKey
in themar kedspace ofthecent erconsole,
th efunction oftheSmar tKey isaut omatically
activ ated (/ page129). Opening
andclosing
67 67

RR
emo emo
ving/ inser ving/
insertingt ting
the emer g he
emer gency key ency
key RR
emo emo
ving t ving
the emer g he
emer gency key ency
key #
Press release button1.
Emer gency key2 ispushe dout slightly. #
Pull outeme rgency key2 untiliten gage sin
th eint ermediat eposition.
% Depending ontheve hicle' seq uipme nt,th e
int ermediat eposition isno tav ailabl e. #
Press release button1 again and fully
re mo veemer gency key2. Inse
r Inse
rtin gt tin
gthe emer g he
emer gen cy key ency
key #
Press release button1. #
Inser temer gency key2 totheint ermediat e
position orfull yuntil iteng ages.
% Youcan usetheint ermediat eposition of
emer gency key2 toatt achth eSmar tKey to
a ke yring. RR
epla cing t epla
cing the Smar he
Smar tKe tK
ey bat t y
bat ter y er
y &
D D
AN AN
GER GER
Riskoffata linjur iesdue tosw al-
lo wing batteries
Bat teries cont aintoxicand corrosiv esubs tan-
ces .Sw allow ing batt eries maycause severe
int ernal burnstooccur within twohour s.
Ther eis arisk offata linjur y. #
Keep batt eries out ofthere ac hof chil-
dr en. #
Ifth ecap and/or thebatt erycom part-
ment doesnotclose securely, do notuse
th eSmar tKey anylon gerand keep out of
th ere ac hof childr en. #
Ifbatt eries aresw allo wed,seek medical
att ention immediat ely. +
ENVIR ENVIR
ONMENT ONMENT
ALNO AL
NOTE TE
Environmen tal
damag edue toimproper disposa lof bat-
te ries Batt
eries cont ainpollut ants. Itis
illeg alto dispose ofthem withth ehousehold
ru bbish. #
Dispose
ofbatt eries inan
en vironment allyre sponsi blemann er.
Ta ke disc hargedbatt eries toaqu ali/ed
special istwo rkshop ortoacolle ction
poin tfo rused batteries. RR
eq eq
uir uir
ements: ements:
R Youre qu ire aCR 2032 3V cell battery. 6868
Opening
andclosing