2021 MERCEDES-BENZ A-CLASS SEDAN ignition

Re
stra int system Pr
otection prov ided bythere stra int system The
restra int system includes thefo llo wing com‐
pone nts:
R Seat beltsystem
R Airbags
R Child restra int system
R Child seatsecur ingsystems
The restra int system can help preve nttheve hi‐
cle occupants from coming intocont actwith
par tsof theve hicle interior intheev ent ofan
acciden t.In theev ent ofan acciden t,th e
re stra int system can also reduce thefo rc es to
whic hth eve hicle occupants aresubject ed.
A seat beltcanonlypr ov ide thebes tle ve lof pro‐
te ction ifit is wo rncor rectl y.Dep endingonthe
de tected acci dent situation, Emerg encyTensi on‐
ing Device sand /or airba gssupp lement thepr o‐
te ction offere dby acor rectl ywo rnseat belt.
Emer gency Tensi oni ng Device sand /or airba gs
ar eno tde ploy ed ineve ryacc iden t. In
order forth ere stra int system toprov ide the
int ended leve lof protect ion, eachve hicle occu‐
pant mustobser vethefo llo wing informatio n:
R Fasten seat belts correctl y.
R Sitinan almos tup right seat position with
th eir bac kag ains tth eseat backres t.
R Sitwithth eir feet resting onthefloor ,if pos‐
sible.
R Alw ayssecur eper sons under 5ft (1.50 m)
ta llin an addition alrestra int system suitable
fo rMer cedes-Benz vehicles.
Ho wever,no system available toda ycan com‐
ple tely elim inat einj uries and fata lities ineve ry
acc iden tsit uatio n.Inpar ticular ,th eseat belt
and airbag gener ally do notpr otect agains t
objec tspene trating theve hicle from theoutside.
It is also notpossible tocom plet elyru le out the
ri sk ofinjur ycaused bytheairbag deploying. Re
duce dre stra int system protection &
WARNIN GRisk ofinju ryor deat hdue to
modif icationstothere stra int system
Ve hicle occupants mayno long erbe protec‐
te das intended ifalt erations aremade tothe
re stra int system. #
Neveralt er thepar tsof there stra int
sy stem. #
Neverta mp erwit hth ewir ing orany
electr oniccomponen tpar tsor their
sof tware. If
it is neces saryto modify theve hicle toacc om‐
modat eaper son withdisabil ities, con tact an
au thor ized Mercedes-B enzCent erforde tails.
US Aonl y:forde tails, con tact ourCu stomer
Assis tance Center on 1-800-F OR-MER Cedes
(1‑80 0‑367‑63 72). Re
stra int system functiona lity When
theignition isswitc hedon,aself-t estis
per form ed, during whic hth e0075 restra int sys‐ 36
Occupant safety

te
m wa rning lam plight sup. Itgoes outnolater
th an afe w sec ond saf te rth eve hicle isstar ted.
The com ponen tsof there stra int system areth en
func tional. Malfu
nctioning restra int system A
malfun ction has occurredin there stra int sys‐
te m if:
R The 0075 restra int system warning lam p
does notlight upwhen theignition is
switc hedon
R The 0075 restra int system warning lam p
light sup con tinuousl yor repeat edly during a
jour ney &
WARNIN GRisk ofinju rydue tomalfu nc‐
tions inthere stra int system
Com ponen tsinthere stra int system maybe
activ ated unint entionall yor notdeplo yas
planned inan acciden t. #
Have there stra int system checkedand
re pair edimmediat elyat aqu alif ied spe‐
cialis two rkshop. Fu
nction ofthere stra int system inan acci‐
dent Ho
wthere stra int system worksis de term ined by
th ese verity of theim pact detected and thetype
of acciden tantic ipated:
R Front alim pact
R Rear impact
R Sideim pact
R Rollover
The activ ation thre sholds forth ecom ponen tsof
th ere stra int system arede term ined based on
th eev aluatio nof thesensor values measur edat
va rious points intheve hicle. Thisprocess ispre-
em ptive in nat ure. The trigg ering/ deplo yment of
th ecom ponen tsof there stra int system mus t
ta ke place ingood timeatthest ar tof thecolli‐
sion.
Fa ctor swhi chcan only besee nand measured
af te ra colli sion hasoccur reddo notpla ya deci‐
siv ero le in thedeplo yment ofan airbag. Nordo
th ey prov ide anindic ation ofairbag deployment .
The vehicle maybe def ormed signif icantl ywit h‐
out anairbag beingdeployed. This isthecase if onl
ypar tswhic har ere lativ elyeasil ydef ormed
ar eaf fect ed and thera te ofvehicle deceler ation
is no thigh. Conversely ,an airbag maybe
deplo yedev en though theve hicle suffers onl y
minor deformation. Ifve ry rigid vehicle parts
suc has longitudinal membersar ehit, this ma y
re sult insuf ficie ntly highleve ls of vehicle decel‐
er ation.
Depending onthede tected dep loyme ntsitu a‐
tion, thecom ponen tsof there stra int system can
be activ ated ordeplo yedindepen dentlyof eac h
ot her :
R Emer gency Tensi oni ng Device :fr ont al
im pa ct, rear impact ,side impact ,ro llo ver
R Driver' sai rba g,front passe nger airba g:fron‐
ta lim pact
R Knee airbag: front alim pact
R Side airbag: sideimpact
R Windo wcur tain airbag: sideimpact ,ro llo ver,
fr ont alim pact
The front passeng erairb agcan onlybe depl oyed
in an acciden tif th ePA SSENGER AIRBAGOF F
ind icat orlam pis off.Ifth efront passeng erseat Occ
upant safety 37

If
th efront passeng erseat isoccupied, theclas‐
sif ication oftheper son orchild restra int system
on thefront passeng erseat take splace afte rth e
fr ont passeng erairb agshut offself-t est.The
PA SSENGER AIRBAGind icat orlam psdispla yth e
st atus ofthefront passeng erairbag.
Alw aysobser vetheno teson thefunc tion ofthe
PA SSENGER AIRBAGind icat orlam ps
(/ page47 ). Fu
nction ofthePA SSEN GERAIRBAGindic a‐
to rlam ps Se
lf-te st of aut oma ticfront passeng erair bag
shu toff
When theignition isswitc hedon,aself-t estis
per form ed dur ing whic hth etw oPA SSENGER
AIR BAGON and OFFind icat orlam pslight up
simul taneou sly. The
status ofthefront passeng erairbag isdis‐
pla yedvia thePA SSENGER AIRBAGind icat or
lam psafte rth eself-t est:
R ON islit:th efront passeng erairbag may
deplo ydur ing anacciden t.
The indicat orlam pgoes outafte rapp rox‐
ima tely 60 seco nd s.
R ON andOF Far eno tlit :th efront passeng er
airbag maydeplo ydur ing anacciden t.
R OFF islit:th efront passeng erairbag isdisa‐
bled. Itwill then notbe deplo yedin theev ent
of an acciden t.
If th ePA SSENGER AIRBAGON indicat orlam pis
of f,on lythePA SSENGER AIRBAGOF Find icat or
lam psho wsthest atus ofthefront passeng er
airbag. ThePASSENGER AIRBAGOF Find icat or
lam pma ybe litcon tinuousl yor be off.
If th ePA SSENGER AIRBAGOF Find icat orlam p
and the0075 restra int system warning lam p
light upsimult aneousl y,thefront passeng erseat
ma yno tbe used. Alsointhis case, donotins tall
a ch ild restra int system onthefront passeng er
seat. Have theaut omatic front passeng erairbag Occ
upant safety 47

R
When entering orexitin gapar kingspace
while using ActivePa rking Assist Au
tomatic measures afte ran acciden t
Dep endingonthetype andseverity of theacci‐
dent ,and depending ontheve hicle's equipment,
th efo llo wing measur escan beimplemen ted, for
ex am ple:
R Automatic braking (post-collisi onbrak e)
R Activati ng thehazar dwa rning light s
R Trigg ering anaut omat icemer gency call
(/ page 239)
R Switc hingoffth eengine
To restar tth eve hicle, switchth eignition off
and switc hit bac kon (/ page12 6).
Dependi ngon thetype andseverity of the
acc iden t,itis poss iblethat theve hicle can
no long erbe star ted.
R Switc hingoffth efuel supply
R Unlocking theve hicle doors
R Lowe ring theside windo ws R
Display ing theemer gency guide in themulti‐
media system displa y
R Switc hingontheint erior lighting
Fu nction ofthepos t-collision brak e
Dep endingontheacciden tsituation ,th epos t-
collision brak ecan minimiz eth ese verity of afu r‐
th er collision oreven avo idit.
If an acc ident isde tected, thepos t-collision
br ak ecan implement automatic braking. When
th eve hicle hascome toast ands till,th eelectr ic
par king brak eis aut omaticall yapplied.
The driver can canc elaut omatic braking bytak‐
ing thefo llo wing actions :
R Brakin gmor est ro ng lythan aut omat icbrak‐
ing
R Fully depr essin gth eacceler ator pedal with
fo rc e Saf
elytranspor tingchildr enintheve hicl e Alw
aysobser vewhen childr enaretrave ling
in theve hicl e %
Also strictly observe thesaf etyno tesfo rth e
specif icsituation. Inthis wa yyo ucan recog‐
nize potentia lri sk sand avoiddang ersif ch il‐
dr en aretrav eling intheve hicle
(/ page52).
Be dilig ent
Bear inmind that neg ligenc ewhen securing a
ch ild inthech ild restra int system mayha ve ser i‐
ous conseq uences. Alwaysbe dilig entinsecur‐
ing ach ild car efull ybef oreeve ryjou rney .
To improve protect ion forch ildr enyoung erthan
12 yearsold orunde r5 ft (1.50 m)inheight ,
Mer cedes- Benzre comme ndsyouobse rveth e
fo llo wing informatio n:
R Alw ayssecur eth ech ild inach ild restra int
sy stem suitable forth is Mer cedes -Benz vehi‐
cle.
R The child restra int system mus tbe appr opri‐
at eto theag e, we ight andsize ofthech ild. Occ
upant safety 51

Side
windo ws Opening
andclosing theside windo ws &
WARNIN GRisk ofentr apment when
ope ning asid ewi ndo w
Whe nope ning asid ewi ndo w,par tsof the
body could bedraw nin or become trap pe d
be twee nth eside windo wand windo wframe. #
When opening ,mak esur eth at nobody
is touc hin gth eside windo w. #
Ifsomeone istrappe d,release thebut‐
to nimm ediate ly or pullit in order to
clos eth eside windo wag ain. &
WARNIN GRisk ofbeco ming trap ped
whe nclos ingasid ewi ndo w
Whe nclos ingasid ewi ndo w,body parts
could betrapped intheclosing area inthe
pr ocess. #
When closing,mak esur eth at no body
par tsarein theclosing area. #
Ifsomeon eis tra pped, release thebut‐
to nimm ediate ly or pres sth ebutt onin
or der toreopen theside windo w. &
WARNIN GRisk ofbeco ming trap ped
whe nch ildr enopera tetheside windo ws
Childr encould become trapped ifth ey oper‐
at eth eside windo ws,par ticular lywhen unat‐
te nde d. #
Activateth ech ild safetyloc kfo rth e
re ar passe nger com partment side win‐
do ws . #
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. #
Neverlea vechildr enunat tende din the
ve hicle. Re
quirement s:
R The powe rsupp lyor theignition isswitc hed
on. 1
Toclos e
2 Toopen
The buttons onthedr iver's door take prece‐
denc e. #
Tostar taut omatic operation :pr ess the
0062 buttonbeyond thepoint ofresis tance
or pulland release it. Open
ingand closing 77

#
Use automatic operation tofully open and
th en close thesliding sunroof. Anti-t
heftpr otection Fu
nction oftheimm obiliz er The
immo bilizerpreve nts your vehicle from being
st ar tedwit hout thecor rect Smar tKey .
The immobilizer isaut omaticall yactiv ated when
th eignition isswitc hedoffand deactiv ated when
th eignition isswitc hedon.
When leaving theve hicle, alwaysta ke theSmar t‐
Ke ywit hyo uand lockth eve hicle. Anyone can
st ar tth eengine ifava lid Smar tKey has been left
inside theve hicle.
% Intheeve nttheengine cannotbe star ted
(y et theve hicle ’sbatt eryis ch arge d), the
sy stem isno toper ational. Contactan
aut hor ized Mercedes- BenzCenteror call
1-8 00-FOR-MER Cedes (intheUS A)or
1-8 00-387-0 100(in Canada). ATA
(anti-thef tala rm system) Fu
nction oftheATA system
If th eATA system isarmed, avisual andaudible
alar mistrigg ered inthefo llo wing situat ions:
R When adoor isopen ed
R When thetrunk lidisopened
R When thehood isopened
R When theint erior motion sensor istrigg ered
(/ page86)
R When theto w- aw ay alar mistrigg ered
(/ page85)
The ATAsy stem isarmed automaticall yaf te r
appr oximat elyte nseco ndsinthefo llo wing situa‐
tion s:
R Afterloc king theve hicle withth eSmar tKey
R Afterloc king theve hicle using KEYLES S-GO Indicat
orlam p1 flashes whentheAT Asy stem
is armed.
The ATAsy stem isdeactiv ated aut omatic allyin
th efo llo wing situat ions:
R Afterunloc kingtheve hicle withth eSmar t‐
Ke y
R Afterunloc kingtheve hicle using KEYLES S-
GO 84
Opening andclosing

#
Push theswitc hint oposition 1or2.
If indicat orlam p3 lights up,thesteer ing
wheel heating isswitc hedon.
When youswit chtheignition off,th esteer ing
wheel heating switchesoff. Easy
entryand exitfeatur e Usi
ngtheeasy entryand exitfeatur e &
WARNIN GRisk ofacci dent whenpu lling
aw ay dur ing theadjus tmentpr ocess for
th eeasy exitfeatur e
Yo uco uld lose contro lof theve hicle. #
Alw ayswa itunt ilth eadjus tmentpr oc‐
ess iscom pletebef orepulling away. &
WARNIN GRisk ofbeco ming trap ped
du ring adjus tment oftheeasy entryand
ex itfeatur e
Yo uand other vehicle occupants could
become trapped. #
Ensur eth at no-one has anybody parts
in thera ng eof mo vement oftheseat.
If th er eis arisk ofbecoming trapped bythe
dr iver's seat: #
Press theseat adjus tmentswitc h.
The adjus tmentpr ocess willbestop‐
ped. Yo
ucan stop theadjus tmentpr ocess bypress‐
ing one ofthememor yfunc tion position
switc hes. &
WARNIN GRisk ofbeco ming trap ped if
ch ildr enact ivat eth eeasy entryand exit
fe atur e‑
Childr encoul dbec ome trapped ifth ey act i‐
va te theeasy entry‑and exitfeatur e,par ticu‐
lar lywhen unattende d. #
Neverlea vechildr enunat tende din the
ve hicle. #
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. 96
Seats andstow ing

When
theeasy entryand exitfeatur eis act ive,
th edr iver's seat willmovebac kwards and the
bac kres twill bemo vedto ast eeper position
when:
R Youswit chtheignition offwit hth edr iver's
door open.
R Youopen thedr iver's door withth eignition
switc hedoff.
% The driver's seat willthen mo vebac kwards
onl yif it is no talr eady atthere ar oftheseat
adjus tmentra ng e.
The seatba ckrest will then mo veforw ards
on lyifit is no talr eady atthefront ofthe
bac kres tadjus tmentra ng e.
The driver' ssea twi llmo vebac kto thelas tdr ive
position when:
R Youswit chtheignition onwithth edr iver's
door closed.
R Youclo sethedr iver's door withth eignition
switc hedon.
The lastdr ive position willbesave dwhen:
R Youswit chtheignition off. R
Youcall uptheseat settings viathememor y
func tion.
R Yousa ve theseat settings viathememor y
func tion. Se
tting theeasy entryand exitfeatur e Mul
timedi asy stem:
4 © 5
Set ting s5
Vehicle
5 Autom aticSeat Adjustmen t
5 Easy Entry/E xit #
Activateor deacti vate thefunc tion. Memor
yfunction Fu
nction ofthemem oryfun ction &
WARNIN GRisk ofan acci dent ifth e
memor yfunction isused whiledr iving
If yo uuse thememor yfunc tion onthedr iv‐
er's side while driving, youco uld lose contro l
of theve hicle asare sult oftheadjus tments
being made. #
Onlyuse thememor yfunc tion onthe
dr iver's side when theve hicle isstatio n‐
ar y. &
WARNIN GRisk ofentr apment whense t‐
ting theseat withth ememor yfunc tion
When thememor yfunc tion adjus tstheseat,
yo uand other vehicle occupants –par ticu‐
lar lych ildr en–could becom etrapped. #
Dur ing theadjus tmentpr ocess ofthe
memor yfunction, makesur eth at no
on ehas anybody partsinthesw eep of
th eseat. #
Ifsomeon ebecomes trapped, press a
pr ese tposition buttonorseat adjus t‐
ment switchimmediat ely. &
WARNIN GRisk ofentr apment ifth e
memor yfunction isactiv ated bychildr en
Childr encould becom etrapped ifth ey act i‐
va te thememor yfunc tion,par ticular lywhen
unatt ended. Seats
andstow ing 97