2021 MERCEDES-BENZ A-CLASS SEDAN Owner's Manual

maximu
mper missi blespeed applying toave hi‐
cle withatrailer isno tde tected bythesy stem.
Ad jus tth espeed inthese situation s. &
WARNIN GRisk ofacci dent dueto Active
Spe edLimi tAssi stadap tingth eve hicle's
speed
The speed adoptedby ActiveSpe edLimi t
Assi stma ybe toohigh orincor rect insome
indi vidualcase s,su ch as:
R atspee dlimit sbelo w12 mp h(20 km/h)
R inwe tcond itions orinfog
R when towing atrailer #
Ensur eth at thedr iven speed complies
wit htraf fic re gulations. #
Adjus tth edr iving speed tosuit current
tr af fic and weather condition s. Fu
nction ofrout e-base dspee dadap tation
When ActiveDis tance AssistDIS TRONI Cis acti ‐
va ted, theve hicle speed willbeadap tedaccor d‐
ing lyto thero uteev ent sahead. Dependingon
th edr ive pr og ram sele cted, theve hicle negoti‐ at
es aro uteeve ntaheadin an eco nomi cal,com‐
fo rtable ordynam icman ner.When thero ute
eve nthasbe en passe d,theve hicle acceler ates
ag ain tothestor ed speed. Thesetdis tance to
th eve hicle infront, vehicles detected aheadand
spe edrestrictions aheadar eta ke nint oacco unt.
Yo ucan activat eand deac tivatero ute-based
spee dadap tatio nin themultimedia system
(/ page16 8).
The follo wing routeeve nts areta ke nint o
acco unt:
R Curves
R T-int ersect ions,ro und about sand tollst atio ns
R Turnsand exits
R Traf fic jams ahead(only with Liv eTr af fic
Inf ormation )
% When theto llst atio nis reac hed, ActiveDis ‐
ta nce AssistDIS TRONI Cad op tsthespeed as
th estor ed speed.
Also, thespeed isreduced ifth etur nsignal indi‐
cat ortochang elane sis swit ched on and one of
th efo llo wing situat ionsisde tected:
R Turning offat intersect ions R
Drivin gon slowing- down lanes
R Drivin gon lanes adjacenttoslo wing-do wn
lanes
The driver isresponsible forch oosing theright
speed andobser vingother road user s.This
applies inpar ticular tointersect ions,ro und ‐
about sand traffic lights, asroute-based speed
adap tatio ndo es notbr ak eth eve hicle toast and‐
st ill.
When routeguidan ceisact ive, thefirs tsp ee d
ad jus tment iscar ried out automatic ally.If th e
tur nsigna lind icatoris swi tched on,theselect ed
ro uteis co nfirmed andfurther speed adjustment
is activ ated.
Speed adaptatio nis canc eled inthefo llo wing
cases :
R Ifth etur nsignal indicat orisswitc hedoff
bef oreth ero uteeve nt.
R Ifth edr iver depr esses theacceler ator or
br ak epedal during thepr ocess.
Sy stem limit s
Ro ute-based speedadap tatio ndo es notta ke
ri ght ofwa yre gulations intoaccount .The driver Dr
iving andparking 16
7

is
responsible forcom plying withro ad traf fic
re gulations anddriving atasuit able speed.
The speed adaptatio nma de bythesy stem may
no talw aysbe suit able, particular lyin thefo llo w‐
ing situat ions:
R The road's coursenotcle arly visib le
R Road nar rowing
R Varying maxim umpermissib lespeeds inindi‐
vidual lanes
R Wetro ad sur faces, snowor ice
In these situation sth edr iver mus tint erve ne
acco rding ly. &
WARNIN GRisk ofacci dent inspi teof
ro ute-based speedadap tatio n
Ro ute-based speedadap tatio ncan malfunc‐
tio nor be temp orarily una vailable inthefo l‐
lo wing situat ions:
R Ifth edr iver does notfo llo wthecalcula‐
te dro ute
R Ifmap datais no tup-t o-dat eor available R
Intheeve ntofroadw orks
R Inbad weather orroad con dition s
R Ifth eacceler ator pedal isdepr essed
R Intheeve ntofelectr onicallydispl ayed
speed limitations #
Adaptth espeed tothetraf fic situ ation. Se
tting rout e-base dspee dadap tation
Re quirement s:
R ActiveDis tance AssistDIS TRONI Cis acti va‐
te d.
R ECOAssis tis activ e.
Multimedia system:
4 © 5
Set ting s5
Assist ance
5 Route-based Speed #
Activateor deacti vate thefunc tion.
When thefunc tion isactiv e,theve hicle
speed isadjus teddependin gon thero ute
eve nts ahead.
% Further information onthero ute-based
spee dadap tatio n(/ page 167). Ac
tiv eSte ering Assis t Fu
nction ofActiv eSte ering Assis t
Ac tiveSt eer ing Assis tis onl yav ailable uptoa
speed of130mp h(210 km/h) .The system helps
yo uto stay inthecent erofthelane bymeans of
moder atesteer ing interve ntio ns.Dep endingon
th espeed driven, ActiveSt eer ing Assis tuses the
ve hicles ahead andlane markings asare fer‐
ence.
% Dependi ngon thecount ry,in thelowe r
speed rang eAc tiveSt eer ing Assis tcan use
th esur round ingtraf fic as are fere nce. Ifnec‐
ess ary, Ac tiveSt eer ing Assis tcan then also
pr ov ide assis tance when drivi ng away from
th ecent erofthelane, forex am ple, toform a
re scue lane.
If th ede tection oflane mar kings andvehicles
ahead isim pair ed,ActiveSt eer ing Assis t
switc hestopassiv emode. Thesystem prov ides
no suppor tin this case.
St atus displa yof Activ eSte ering Assis tin
th emu ltifunct iondisp lay
R Ø (gra y): act ivat ed and pass ive
R Ø (gre en): activ ated and activ e 16
8
Driving and parking

R
Ø (red): system limits detected
R Ø (whit e,redhands): "handsonthesteer‐
ing wheel" prom pt
% During thetransition from activ eto passiv e
st atus ,th eØ symbol issho wnas
enlar gedand flashin g.On ce thesy stem is
passiv e,theØ symbol issho wnasgray in
th emultifunc tiondispla y.
% Dep endingontheselect edvehicle settin gs,
Ac tiveSt eer ing Assis tma ybe una vailable.
Ste ering and touc hde tection
The driver isrequ ired tokeep their hands onthe
st eer ing wheel atall times andbeable tointer‐
ve ne atanytime tocor rect thecour seofthe
ve hicle andkeep itin lane. Thedriver mus t
ex pect ach ang efrom active to passiv emode or
vice versaat anytim e. If
th esy stem detects that thedr iver has not
st eer edtheve hicle fora consider ableper iod of
time orhas remo vedth eir hands from thesteer‐
ing wheel, display1 appear s.Ifth edr iver still
does notst eer theve hicle, awa rning tone
sou nds inad ditio nto thevisual warning mes‐
sag e.
If th edr iver does notre act tothewa rning fora
consider ableper iod, thesy stem can initiat ean
emer gency stop (/ page17 0).
Th ewa rning isno tissued orisstopped whenthe
dr iver giv es con firm atio nto thesy stem:
R The driver steer sth eve hicle. R
Depending onthecount ry:th edr iver
pr esses ast eer ing wheel buttonoroper ates
To uc hCon trol
If Ac tiveSt eer ing Assis tde tects that asy stem
limit hasbeen reac hed, avisual warning is
issued andawa rning tone sou nds.
Obs erve theno teson driving systems andyour
re sponsibili ty;yo uma yot her wise failto recog‐
nize dangers(/ page 151).
Sy stem limit s
Ac tiveSt eer ing Assis thas alimit edsteer ing tor‐
qu efo rlat eral gui dance. Insome cases, the
st eer ing interve ntio nis no tsu fficien tto keep the
ve hicle inthelane ortodrive th ro ugh exits.
The system maybe impair edorma yno tfunc tion
in thefo llo wing instances:
R The reispoor visibilit y,e.g. due tosno w,rain,
fo g, hea vyspr ay,gr eatl yva rying ambien t
light orstro ng sha dows onthero ad.
R Ther eis glar e, e.g .fr om oncom ingtraf fic,
di re ct sunli ght orreflect ions.
R Insuf ficie ntroad illumin ation. Dr
ivin gand parking16
9

R
The windshield isdir ty,fo gg ed up, damag ed
or coveredin thevicinit yof thecamer a,e.g.
by ast icke r.
R No,or several,unc lear lane markingsare
pr esen tfo rone lane, orthemar king sch ang e
qu ickl y, forex am ple, inacon stru ction area
or atintersecti ons.
R The lane mar kings arewo rnaw ay,dar kor
co veredup, e.g. bydirtor sno w.
R Ifth edis tance totheve hicle infront istoo
shor tand thus thelane marking scann otbe
de tected.
R The road isnar row and wind ing.
R Ther ear eobs tacle son thelane orprojec ting
out intoth elane, suchas objec tmar kers.
The system does notpr ov ide assis tance inthe
fo llo wing condition s:
R Ontigh tcur vesand when turning.
R When crossing intersections.
R Atround about sor tollplazas.
R When thetir epr essur eis toolow. &
WARNIN GRisk ofacci dent ifAc tive
St eer ing Assis tune xpect edlystops func‐
tionin g
If th esy stem limits ofActiveSt eer ing Assis t
ar ere ac hed ther eis no guar anteethat the
sy stem will remain activeor wil lke ep the
ve hicle inlane. #
Alw ayske ep your han dson thesteer ing
wheel andobser vethetra ffic car efull y. #
Alw aysst eer theve hicle paying atten‐
tion totraf fic condi tions. &
WARNIN GRisk ofacci dent ifAc tive
St eer ing Assis tune xpect edlyinterve nes
The detection oflane mar kings andobje cts
ma ymal functi onand causeune xpect ed
st eer ing interve ntio ns. #
Steer accor dingtotraf fic condi tions. Ac
tiv atin g/deac tivatin gAc tiv eSte ering
Assis t
Re quirement s:
R ESP®
is act ivat ed, but isno tint erve ning .
R ActiveDis tance AssistDIS TRONI Cis acti va‐
te d.
Multimedia system:
4 © 5
Set ting s5
Quick Access #
Select 004FSteering Assist. Fu
nction ofActiv eEme rgency Stop Assis t 17
0
Driving and parking

If
th esy stem detects that thedr iver has not
st eer edtheve hicle fora consider ableper iod of
time orhas remo vedth eir hands from thesteer‐
ing wheel, display1 appear sin themultifunc ‐
tion displa y.Ifth edr iver still does notst eer the
ve hicle, orgiv es no conf irmation tothesy stem,
a wa rning tone sou nds inad ditio nto thevisual
wa rning mess age.
If th edr iver still does notre spond tothewa rn‐
ing, theBeginn ingEmer gencySt op messag e
appear sin themultifunc tiondispla y.Ifth edr iver
st ill does notre spond, ActiveDis tance Assist
DIS TRONI Creduces thespeed. Thevehicle is
deceler ated instag es toast ands till.
De pen dingon thecount ry,at speeds below
40 mph(60 km/h) thehazar dwa rning light s
switc hon aut omat ically.
When theve hicle isstatio nary,thefo llo wing
act ions arecar ried out :
R The vehicle issecur edwithth eelectr icpar k‐
ing brak e.
R ActiveDis tance AssistDIS TRONI Cis end ed
R The vehicle isunloc ked. R
Ifpossible, anemer gency callis place dto
th eMer cedes- Benzemergency callcent er
The driver can cance lth edeceler ationatany
time byper form ing one ofthefo llo wing actions :
R Steer ing
R Braking oracceler ating
R Deact ivating ActiveDis tance Assist
DIS TRONI C Ac
tiv eLan eCha ngeAs sist Fu
nction ofActiv eLan eCha ngeAs sist
Ac tiveLa ne Chang eAssi stsuppor tsthedr iver
when chang inglane sby appl ying steer ing torq ue
if th edr iver oper ates atur nsignal indicat or.
Obser vetheno teson driving systems andyour
re sponsibili ty;yo uma yot her wise failto recog‐
nize dangers(/ page 151).
Assis tancewhe nch ang inglane sis prov ided ifall
th efo llo wing condition sar eme t:
R Youar edr ivin gon afree wa yor road with
mult iplelanesin thedir ect ion oftra vel. R
The neigh boring lane issepar ated byabr o‐
ke nlane ma rking.
R Novehicle isde tected intheadjacen tlane.
R The vehicle speed isbe tween 50mph
(80 km/ h)and 110mp h(1 80 km/h).
R ActiveLa ne Chang eAssi stisswitc hedonin
th emultimedia system.
R ActiveSt eer ing Assis tis activ ated and activ e.
If no vehicle isde tected intheadjacen tlane and
a lane chang eis per mitted, thelane chang e
begin saf te rth edr iver has activ ated thetur nsig‐
nal indicat or.This issho wntothedr iver wit ha
gr een arro w ne xt to the± steer ing wheel
symbol. TheLane Change tothe Left messag e,
fo rex am ple, also appear s.IfAc tiveLa ne Chang e
Assi sthas been activated withth etur nsignal
indicat orbut alane chang eis no timm ediat ely
poss ible, agr ay arro w appear sne xt to the±
st eer ing wheel symbol, whichre mains green.
When thelane chang eassis tance star ts,th etur n
signal indicat orisaut omaticall yactiv ated along
wit hth edispla yin themultifunc tiondispla y. Dr
iving and parking 17
1

If
th eassis tance grap hicis sho wnwhen chang ‐
ing lane s,an addit ionalarrow appear sin itpoin t‐
ing towa rdsth eadjacen tlane (/page16 2).
If alane chang eis no tposs ible, thear row is
fa ded outafte ra fe w sec ond sand ane wlane
ch ang emus tbe init iated. Animm ediat elane
ch ang eis on lypossible onfree wa ysec tion s
wit hout speedlimi ts.
If th esy stem isim pair ed,ActiveLa ne Chang e
Assi stma ybe canceled .If it is canceled ,th e
Lane Change Cancel edmessag eappe arsin the
multifu nctiondisplay.
In addi tion, awa rning tone maysou nd, depend‐
ing onthesituation . &
WARNIN GRisk ofacci dent whench ang ‐
ing lane toan occ upied adjacentlane
Lan eChan geAssi stcanno tal wa ys cle arly
de tect ifth eadjacen tlane isfree.
The lane chang emigh tbe init iated although
th eadjacen tlane isno tfr ee. #
Beforech ang inglane s,mak esur eth at
th eneighbor inglane isfree and ther eis
no dang ertoother road user s. #
Mon itor thelane chang e. &
WARNIN GRisk ofacci dent ifLane
Ch ang eAssi stune xpectedl yst ops func‐
tionin g
If th esy stem limit ations forLane Change
Assis tha ve been reac hed, ther eis no guar‐
ant eethat thesy stem will remain active.
Lane ChangeAssis tcanno tth en assis tyo u
by appl ying steer ing torq ue. #
Alw aysmonit orthelane chang eand
ke ep your han dson thesteer ing wheel.
Obser vethetra ffic con dition sand steer
and/or brak eif neces sary. Sy
stem limit s
The system limit ations ofActiveSt eer ing Assis t
apply toActiveLa ne Chang eAssi st
( / pag e16 8). The
system mayalso beimpair edorma yno t
func tion inthefo llo wing situat ions:
R The sensorsin there ar bum peraredir ty,
damag edorcoveredby ast icke ror ice and
sno w,forex am ple.
R The exterior lighting showsamalf unction.
% The ActiveLa ne Chang eAssi stsensor s
adjus taut omaticall ywhile acer tain dis tance
is be ing driven afte rth eve hicle hasbeen
deliv ered. ActiveLa ne Chang eAssi stis
una vailable oronl ypar tiall yav ailable during
th is teac h-in proce ss;noarro w appear sne xt
to theØ ActiveSt eer ing Assis tsymbol
when thetur nsignal indicat orisactiv ated.
Ac tiv atin g/deac tivatin gAc tiv eLan eCha nge
As sist
Multimedia system:
4 © 5
Set ting s5
Assist ance
5 Act ive Lane Change Assist #
Activateor deacti vate thefunc tion. 17
2
Driving and parking

Ac
tiv eBr ak eAs sist Fu
nction ofActiv eBr ak eAs sist
Ac tiveBr ak eAssi stconsi stsof thefo llo wing
func tions:
R Distance warning func tion
R Autonomo usbraki ng func tion
R Situ ation-d epend ent braki ng assist anc e
R Vehicl eswith Drivin gAss istanc ePa ck‐
ag e:Evasi ve Steer ing Assis tand corner ing
func tion
Ac tiveBr ak eAssi stcan helpyo uto minimize the
ri sk ofacollision withve hicles, cyclis tsor
pedes trians ortoreduce theef fects ofsuch a
coll ision.
If Ac tiveBr ak eAssi sthas detected arisk ofcolli‐
sion, awa rning tone sou nds and theL dis‐
ta nce warning lam plight sup intheins trument
clus ter.
Ve hicl eswith PRE-S AFE®
:depe nding onthe
cou ntry,an addit ionalhap ticwarning occursin
th efo rm ofslight, repeat edtensi oni ng ofthe
seat belt. If
yo udo notre act tothewa rning, autono mous
br akin gcan beinit iated incritic alsituat ions.
In espec iallycritic alsituat ions,Ac tiveBr ak e
Assi stcan initia te aut onomo usbrakin gdir ect ly.
In this case, thewa rning lam pand warning tone
occu rsi mu ltane ously with thebr aking applica‐
tion .
If yo uappl yth ebr ak eyo urself inacr itical situa‐
tio nor appl yth ebr ak edur ing autonomous brak‐
ing, situation -dependen tbr aking assistance
occu rs.The brak epr ess ureincr eases uptomax‐
imum full-sto pbr aking ifnec essar y.
Obser vetheno teson driving systems andyour
re sponsibili ty;yo uma yot her wise failto recog‐
nize dangers(/ page 151). If
aut onom ous brak ing or situa tion-de pende nt
br aki ng assist anc ehas occurred, displa y1
appear sin themultifunc tiondispla yand then
aut omaticall ygoes outafte ra shor ttime.
If th eaut onomous braking function orthesitua‐
tion -dependen tbr aking assistance istrig ge red,
additional preve ntiv emea suresfo roccupa nt
pr otect ion (PRE-S AFE®
)ma yalso beinitiat ed. Dr
iving andparking 17
3

&
WARNIN GRisk ofan acci dent caused by
limit eddetection perform anc eof Active
Br ak eAssi st
Ac tiveBr ak eAssi stcanno tal wa ys cle arly
ident ifyobje ctsand complextraf fic situ a‐
tions . #
Alw ayspa ycar eful attention tothetra f‐
fi c situ ation; donotre ly on ActiveBr ak e
Assi stalon e.Ac tiveBr ak eAssi stisonl y
an aid. Thedriver isresponsible for
maint ainingasuf ficie ntly safedist anc e
to theve hicle infront, vehicle speed
and forbr aking ingood time. #
Beprepa redto brak eor sw erve ifnec ‐
essar y. Als
oob ser vethesy stem limits ofActiveBr ak e
Assi st. The
indiv idua lsub func tions areav ailab lein
va rious speed rang es:
The distance warning func tion canissue awa rn‐
ing inthefo llo wing situat ions:
R From appr oximat ely4 mp h(7 km/h), ifyo ur
ve hicle iscritically closetoave hicle, cyclis t
or pedes trian, youwill hear anintermit tent
wa rning tone and theL distance warning
lam plight sup intheins trument cluster.
Ve hicl eswith PRE-S AFE®
:depe nding on
th ecount ry,an addition alhap ticwarning
occ ursin thefo rm ofslight, repeat edten‐
si oni ng oftheseat belt.
Br ak eimmediat elyortake evasiv eact ion,pr ov i‐
ded itis saf eto do soand thetraf fic situ ation
al lo ws this. Dis
tance warning funct ion(vehicles without
Dr iving Assistance Packag e)
The distance warning func tion canaidyouin the
fo llo wing situat ionswithan intermit tent wa rning
to ne and awa rning lam p:
R atspeeds uptoappr oximat ely15 5mp h
(250 km/h)when approaching vehicles
ahead
R atspeeds uptoappr oximat ely50 mph
(80 km/ h)when approaching statio naryve hi‐
cles, moving pedes trians andcyclis tsahead
R atspeeds uptoappr oximat ely37 mph
(60 km/ h)when approaching crossin g
cy clis ts
Dis tance warning funct ion(vehicles with
Dr iving Assistance Packag e)
The distance warning func tion canaidyouin the
fo llo wing situat ionswithan intermit tent wa rning
to ne and awa rning lam p:
R atspeeds uptoappr oximat ely15 5mp h
(250 km/h)when approaching vehicles
ahead 17
4
Driving and parking