2023 MERCEDES-BENZ A CLASS sensor

*
N N
O O
TE TE
Impai rment oftheoper ating e1-
ciency ofthere str aint system sfrom
inst alling acce ssorypar tsor from repair s
or we lding Airbags
andEmer gency Tensio ning Device s,
as wellas contr olunits andsensor sfo rth e
re str aint system s,ma ybe inst alle d in thefo l-
lo wing areas ofyour vehicle:
R Door s
R Door pillars
R Door sills
R Seats
R Coc kpit
R Instrumen tclus ter
R Cent erconsole
R Lateral roof frame #
Donotins tallacces sorypar tssuc has
audio systems inthese areas. #
Donotcar ryout repair sor we lding. #
Have accessor ypar tsretro/tt edata
qu ali/ed special istwo rkshop. Yo
ucould jeopar dizetheoper ating safetyof your
ve hicle ifyo uuse parts,tires and wheels aswell
as acces sories releva nt tosaf etywhic hha ve not
bee napp rove dby Mer cedes-Be nz.Safety-re leva nt
sy stems ,e.g. thebr ak esy stem, maymalfunction.
Onl yuse genuine Mercedes-Be nzpar tsor par tsof
eq ual qualit y.Onl yuse tires, wheels andacces-
sor ypar tsthat have been speci/call yappr oved
fo ryo ur vehicle model .
Genu ineMer cedes- Benzpar tsaresubj ectto
str ictqu alit yinsp ections. Eachpar thas been spe-
ciall yde veloped, manufacturedorselect edfor
Mer cedes-Be nzvehicles andadap tedto them.
Ther efor e, onl yge nuine Mercedes-Be nzpar ts
sh ould beuse d.
Mor eth an 300,0 00di.er entgenuine Mercedes-
Benz partsareav ailabl efo rMer cedes-Benz mod-
els.
All aut hor ized Mercedes-Benz Centersmaint aina
suppl yof genuine Mercedes-Be nzpar tsforneces-
sar yser vice andrepair work.In add ition, strategi-
cal lylocat edpar tsdeliv erycent erspr ov ide for
qu ick and reliable partsser vice. Alw
aysspecif yth eve hicle identi/cation number
(VIN) (/page327) when order ing genuine
Mer cedes-Be nzpar ts. Ope
r Ope
rat at
or's Manua l or's
Manua l
This Operator's Manual andtheDigit alOper ator's
Manual intheve hicle descr ibethefo llo wing mod-
els and thestandar dand special equipment for
yo ur vehicle:
R The model sand thestandar dand special
eq uipment availabl eat thetime ofthis Oper a-
to r's Manual goingtopress.
R The models andthestandar dand special
eq uipment onlyav ailabl ein cer tain countr ies.
R The models andthestandar dand special
eq uipment, whichwill onlybe availabl eat a
lat er dat e.
No tethat your vehicle mayno tbe equipp edwith
all featur esdescr ibed.This isalso thecase for
sy stems releva nt tosaf ety. Theref ore, theeq uip-
ment onyour vehicle maydi.er from that inthe
descr iptions andillustrations. Gener
alno tes
23 23

Go
vernment alenti ties areth emsel ves, in ind ivid-
ual cases andwithin theapplicable legalframe-
wo rk,aut hor izedto read out datafrom theve hi-
cle. Inthecase ofan accident, information that
can help withan inve sti gation can, ther efor e, be
ta ke nfrom theairbag controlunit, forex am ple.
Oper Oper
ationaldat atio
naldatain t a
in the v he
vehicle ehicle
This isdat are ga rding theoper ation oftheve hicle,
whic hha ve been processed bycont rolunits.
This includes thefo llo wing data,forex am ple:
R Vehicle status informatio nsuc has thespeed,
longitudin alacceler ation,lateral acceler ation,
number ofwheel revo lutions orthefa stene d
se at belts di sp lay
R Ambient cond itio ns ,su ch astemp eratur e,rain
sensor ordist ance sensor
Gener ally,theuse ofthese datais temp orary;
th ey will notbe stor ed beyond theper iod ofoper -
ation andwillonlybe processed within theve hicle
itse lf. Con trol uni tsoTen containdatamemor ies
fo rve hicle keys,fo rex am ple. Theiruse permits
th ete mp oraryor per manent document ationof
te ch nica linf orma tion abouttheve hicle' soper at- ing
stat e, com pone ntloads, maintenanc ere qu ire-
ments andtech nica leve nts orma lfunct ions.
Dep ending ontheve hicle equipmen t,thefo llo w-
ing dataar estor ed:
R Oper ating status ofsystem com ponents, such
as /ll leve ls, tirepr essur eor batt eryst atus
R Malfunctions orfaults inimpor tant system
com pone nts,suchas ligh tsor brak es
R System reactio nsinspecial drivi ng situ atio ns,
suc has airbag deployment ortheint erve ntion
of stabi lity cont rolsy stems
R Information onevents leading tovehicle dam-
ag e
In cer tain cases ,it ma ybe requ ired tostor eda ta
th at wo uld have other wise been usedonlyte mp o-
ra rily .This maybe thecase ifth eve hicle has
de tected amalfu nction, forex am ple.
If yo uuse services, suchas repair services and
maint enance work,st or ed oper ation aldat aas
we llas theve hicle identi/cation numbercan be
re ad out and used. Theycan beread out by
ser vice networkem ployees, suchas workshops
and manu factur ersor third par ties, suchas break - do
wn services. Thesame istrue inthecase of
wa rrant yclaims andqualit yassur ance measur es.
In gener al,there adout isper form ed via theleg ally
pr escr ibed portfo rth ediagnost icsconnection in
th eve hicle. Theoper ation aldat ath at arere ad out
docume nttech nica lst at es oftheve hicle orof
ind ividual compone ntsand assis tin thediagnosis
of malfunctions, compliance withwa rrant yobli ga-
tions andqualit yim prov ement. Tothat end ,th ese
dat a,in par ticular information aboutcomponent
loads, tech nica leve nts, malfunct ionsandother
fa ults maybe transmitt edalong withth eve hicle
identi/cation numbertothemanuf acturer.Fu r-
th er mor e,themanuf acturerissubject toproduct
liability .Fo rth is reason themanuf actureralso
uses operational datafrom theve hicle, forex am-
ple, forre calls. These datacan also beused to
ex amin eth ecust omer's warrant yand guar antee
claims.
Fa ult memor iesintheve hicle canberese tby a
ser vice outletor atyour requ est aspar tof repair
or maint enance work. 3232
Gener
alno tes

RR
es estr tr
aint syst aint
system function ality em
function ality When
theve hicle isswitc hedon,aself -tes tis per -
fo rm ed, during whic hth e0075 restr aint system
wa rning lamplights up.Itgoes outnolater than a
few secon dsaTer theve hicle isstar ted. The com-
ponent sof there str aint system areth en func-
tional. Malfunction
ingr Malfunction
ingres estr tr
aint syst aint
system em
A
malfunction hasoccur redin there str aint sys-
te m if:
R The 0075 restr aint system warning lampdoes
no tlight upwhen theve hicle isswitc hedon
R The 0075 restr aint system warning lamplights
up continuousl yor repeat edlydur ing ajour ney &
W W
ARNIN G ARNIN
GRisk ofinju rydue tomalfun c-
tions inthere str aint system
Co mp onent sin there str aint system maybe
acti vatedunint ention allyor notdeplo yas plan-
ned inan accident. #
Have there str aint system checkedand
re pair edimmediat elyat aqu ali/ed spe-
ciali stwo rkshop. FF
unct ionoft unct
ionofthe r he
res es
tr tr
aint syst aint
system inan acciden t em
inan acciden t Ho
wthere str aint system worksis de term ined by
th ese verity of theim pact detected and thetype
of accident anticipated:
R Front alim pact
R Rear impact
R Side impact
R Rollover
The activati on thre sholds forth ecom ponents of
th ere str aint system arede term ined based onthe
ev aluat ionofthesensor values measured atvari-
ous points intheve hicle. Thisprocess ispre-e mp -
tiv ein natur e.The trigg ering/deplo ymentofthe
com pone ntsofthere str aint system musttake
place ingood timeatthestar tof thecollision.
Fa ctor swhic hcan onlybe seen andmeasur ed
aTer acollisi onhas occur reddo notpla ya deci- siv
ero le in thedeplo yment ofan airbag. Nordo
th ey prov ide anindication ofairbag deployment.
The vehicle maybe def ormed signi/cantl ywit hout
an airbag beingdepl oyed.This isthecase ifonl y
par tswhic har ere lativ elyeasil ydef ormed are
a.ec tedand thera te of vehicle decel eration is
no thigh. Conversely, an airbag maybe depl oyed
ev en though theve hicle su.er sonl ymin ordef or-
matio n.Ifve ry rigid vehicle partssuc has lon gitu-
din almembe rsarehit, this ma yre sult insu1-
cientl yhigh leve ls of vehicle decel eration .
Depen dingon thede tected deplo yment situation,
th ecom ponents ofthere str aint system canbe
ac tiva tedor deplo yedindepende ntlyof eac h
ot her :
R Emer gency Tensio ning Device :fr ont alim pac t,
re ar impact, sideimpact, rollo ver
R Driver's airbag, front passeng erairbag: front al
im pact
R Knee airbag: front alim pact
R Side airbag: sideimpact
R Windo wcur tain airbag: sideimpact, rollo ver,
fr ont alim pa ct 3838
Oc
cupa nt safety

This
maybe thecase inpar ticular ifth eairbag
is int egratedint oth eseat. #
Alwaysst ow and secur eobj ects cor-
re ctl y. #
Beforeco mm encingyour jour ney,mak e
sur eth at no objects arestowe din the
deplo yment area ofan airbag. &
W W
ARNIN G ARNIN
GRisk ofinju ryor deat hdue to
th euse ofunsuit ableseat covers
Due tounsuit ableseat covers,th eairbags
canno tpr otect vehicle occupan tsas intend ed.
In addit ion,th eoper ation oftheaut omatic
fr ont passeng erairbag shuto.could be
re str icte d. #
Youshould onlyuse seat covers that
ha ve been approved forth ecor respond -
ing seats byMer cedes-Be nz. &
W W
ARNI NG ARNI
NGRisk ofinjur ydue tomalfun c-
tioni ngsensor sin thedoor
The function oftheairbags canbeimpair ed
due tomodi/cation sor incor rect wo rkper -
fo rm ed on thedoor sor door trim, orifth e
door sar edamag ed. #
Nevermodify thedoor sor par tsof the
door s. #
Alwaysha ve workon thedoor sor door
tr im car ried out ataqua li/ed specialist
wo rkshop. &
W W
AR NIN G AR
NIN GRisk ofinjurydue todeplo yed
airbag
A depl oyedairbag nolong ero.er san ypr otec-
tion. #
Have theve hicle towe dto aquali/ed
special istwo rkshop inorder tohave the
deplo yedairbag replaced. Ha
ve deplo yedairbags replaced immediat ely. SS
t t
atus oft atus
ofthe fr he
front passen g ont
passen ger fr er
front airbag ont
airbag FF
unct ionoft unct
ionofthe aut he
aut omati cfr omati
cfront passen g ont
passen ger airbag er
airbag
shut shut
o. o.
The automati cfront passen gerairbag shuto.is
able todetect whe ther thefront passeng erseat is
occupied byaper son orach ild restr aint system .
Th efron tpa sseng erairb ag andfron tpa sseng er
kn ee airb ag areena bled ordisa bled acco rdingl y. &
W W
ARNI NG ARNI
NGRisk ofinjur yor dea thdue to
objects undertheco-dr iver seat
Objects trapped undertheco-dr iver seat can
int erfere wit hth efunction oftheaut omatic
co-dr iver airbag shuto.ordamag eth esy stem. #
Donotst or ean yobjects undertheco-
dr iver seat. #
When theco-dr iver seat isoccupied,
mak esur eth at no objects aretrapped
und ertheco-dr iver seat. When
installing ach ild restr aint system onthe
fr ont passeng erseat,ob serveth eve hicle-spe ci/c
inf ormatio n(/ page62). Also,alw aysobser ve
th eno teson rear wa rd-faci ng orforw ard-f acing 4646
Occupan
tsaf ety

or
#
Mak esur eth at theSmar tKey isat amin-
imum distance of10 T(3 m) away from
th eve hicle. Obser
vetheno tes:
R Onwashing theve hicle inacar wash
(/ page264)
R Onusin gahigh pressur eclean er
(/ page266) #
T T
o unl oc o
unl ockt k
the v he
vehicle : ehicle
:to uc hth einner surface
of thedoor handle. #
T T
o loc o
loc kt k
the v he
vehicle: ehicle:
touc hsensor surface 1
or 2. #
Con v Con
venie nce closin g: enie
nce closin g:touc hre cessed sensor
sur face 2 untilth eclosing process hasbeen
com pleted. %
Further informatio non con venienc eclo sing
(/ page79) .
If yo uopen thetrunk lidfrom outside, thetrunk
lid isaut omaticall yunloc ked. PrPr
oblems wit oblems
withKEYLES S-GO,tr h
KEYLES S-GO,troubleshoo oubleshoo
ting ting
YY
ou can nolong ou
can nolong erloc er
loc kor unloc k
or unloc kt k
the v he
vehicle using ehicle
using
KEYLES S-GO KEYLES
S-GO
Po ssible causes:
R The funct ion oftheSmar tKey has been deact i-
va ted.
R The Smar tKey batt eryis we ak ordisc harged. #
Activateth efunction oftheSmar tKey
( / pag e67). #
Chec kth ebatt eryusing theindicat orlam p
(/ page66). #
Replace theSmar tKey batt ery, ifnecessar y
(/ page68). #
Use there placement SmartKey . #
Use theemer gency keyto loc kor unloc k
(/ page72). Opening
andclosing
71 71

&
W W
ARNI NG ARNI
NGRisk ofbur nscause dby aho t
ex haus tsy stem
The vehicle exhaus tsy stem can become very
ho t.Ifyo uuse HANDS-FR EEACCESS, you
could burnyo urself bytouc hing theex haus t
sy stem. #
Alwaysensu rethat youonl ymak eakic k-
ing movement within thede tection rang e
of thesensor s. *
N NO O
TE TE
Damag eto theve hicle caused by
unint entionall yopening thetrunk lid R
When usinganaut omatic carwash
R When usingahigh pressur eclean er #
Deact ivat eth efunction oftheSmar tKey
in these situations.
or #
Mak esur eth at theSmar tKey isat amin-
imum distance of10 T(3 m) away from
th eve hicle. When
makingth ekic king movement, makesur e
th at youar estanding /rml yon thegr ound. You
could other wise loseyour balance, e.g.onice.
Obser vethefo llo wing notes:
R The Smar tKey isbehind theve hicle.
R Stand atleas t12 in(30 cm) awayfrom the
ve hicle while perform ing thekic king move-
ment.
R Donotcome intocont actwithth ebum per
while making thekic king movement.
R Donotcar ryout thekic king movement too
slo wly .
R The kicking movement mustbetowa rdsth e
ve hicle andbackag ain. 1
Detection rang eof thesensor s
If se veralconsecutiv ekic king movements areno t
successful, waitte nsec onds .
Sy st Sy
stem limits em
limits
The system maybe impai redor ma yno tfun ction
in thefo llo wing cases :
R The sensor sar edir ty,e.g. duetoroad salt or
sno w.
R The kicking movement ismade usingapr os-
th etic leg. 7676
Opening
andclosing

The
trunk lidcou ldbe ope ned unint entio nally,in
th efo llo wing situations:
R Aper son's arms orlegs aremo ving inthesen-
sor detection rang e, e.g. when polishing the
ve hicle orpic king upobj ects.
R Objects aremo vedor placed behind theve hi-
cle, e.g.th efuel pum phose, chargin gcable or
lug gage .
R Clam pingstraps, tarp sor other coverings are
pull edove rth ebum per.
R Apr otectiv emat withalengt hre ac hing over
th etrunk silldown intoth ede tection rang eof
th esensor sis used.
R The protectiv emat isno tsecur edcor rectl y.
Deactiv ateth efunction oftheSmar tKey
( / pag e67) ordo notcar rytheSmar tKey about
yo ur per son insuc hsituations. UUnloc nloc
king andopening t king
andopening the tr he
trunk fr unk
from inside with om
inside with
t t
he emer g he
emer gency r ency
release elease
RR
eq eq
uir uir
ements: ements:
R The 12Vve hicle batteryis conn ectedand
ch arge d. #
Press theemer gency release button1
br ie0y . Side
windo ws Sid
ewi ndo ws Openin
gand closing t Openin
gand closing the side windo ws he
side windows &
W W
ARNI NG ARNI
NGRisk ofentr apm entwhen ope n-
ing asid ewind ow
When opening aside windo w,par tsof the
body could bedraw nin or bec ome trapp ed
be tween theside windo wand windo wframe. #
When opening, makesur eth at nob ody is
to uc hing theside windo w. #
Ifsomeo neistrapped ,re lease thebut-
to nimm ediately or pull itin order to
close theside windo wag ain. &
W W
ARNIN G ARNIN
GRisk ofbecoming trapped when
closing aside windo w
When closing aside windo w,body partscould
be trapped intheclosing area inthepr ocess. #
When closing, makesur eth at no body
par tsarein theclosing area. Opening
andclosing
77 77

The
sliding sunr The
sliding sunroof canno oof
canno tbe closed and y t
be closed and you can- ou
can-
no no
tsee t t
see the cause . he
cause .
% The term "slidin gsunr oof" also refers to the
panor amaroof wit hpo we rtilt/sliding panel.
If th esliding sunroofisobstr ucteddur ing closing
and reopens again slightl y: #
Immedi atelyaTer automati cre ve rsing, pull
and hold the0057 buttondown again tothe
point ofresis tance until thesliding sunroofis
closed.
The sliding sunroofwillbeclosed with
incr eased forc e.
If th esliding sunroofisobstr uctedagain and
opens again slightl y: #
Repeat thepr ev ious step.
The sliding sunroofwillbeclosed again with
incr eased forc e.
V V
ehicles wit ehicles
withapanor h
apanor amar ama
roof wit oof
withpo w h
po wer tilt/ er
tilt/
sliding panel:Thesliding sunr sliding
panel:Thesliding sunroofort oof
orthe r he
roller sun- oller
sun-
blind isno blind
isno toper t
oper ating smoot ating
smoothl y hl
y. .
#
Resetth esliding sunroofand thero ller sun-
blind. R R
ese ese
tting t tting
the sliding sunr he
sliding sunroofand t oof
and the r he
roller sun- oller
sun-
blind blind
#
Pull and hold the0057 buttonlittle bylittle
until thesliding sunroofisfull yclosed. #
Pull and hold the0057 buttonlittle bylittle
until thero ller sunblind isfull yclosed. #
Use automatic operation tofully open and
th en close thesliding sunroof. An
ti-t An
ti-theT heT
prot pr
otection ection
FF
unction oft unction
ofthe immobilizer he
immobilizer The
immobilizer prev ents your vehicle from bein g
st ar tedwit hout thecor rect Smar tKey .
The imm obilizer isaut oma tically ac tivated when
th eve hicle isswitc hedo.,and deact ivat ed when
th eve hicle isswitc hedon.
When leavingth eve hicle, alwaysta ke theSmar t-
Ke ywit hyo uand lockth eve hicle. Anyone can
st ar tth eve hicle ifava lid Smar tKey has been leT
insi detheve hicle.
% Intheev ent theengine cannotbe star ted(yet
th eve hicle ’sbatt eryis ch arge d), thesy stem is no
toper ational. Contactanaut hor ized
Mer cedes-Benz Centeror call
1-800-F OR-MER Cedes (intheUS A)or
1-800-387- 0100(inCanada). AA
T T
A A
(an ti-t (an
ti-theT heT
alar alar
msyst m
system) em)
FF
unction oft unction
ofthe AT he
ATA syst A
sy stem em
If th eATA system isarmed, avisu aland audibl e
alar mistrigg ered inthefo llo wing situations:
R When adoor isopened
R When thetrunk lidisopened
R When thehood isopened
R When theint erior motion sensor istrigg ered
(/ page86)
R When theto w- awa yalar mistrig ge red
( / pag e85)
The ATA system isarmed automati callyaTer
appr oximat elyte nsec onds inthefo llo wing situa-
tions:
R ATer locking theve hicle withth eSmar tKey
R ATe rlo ck ing theve hicle usingKEY LESS-GO 8484
Open
ingand closin g