2023 MERCEDES-BENZ A CLASS Owners Manual

R
Ifth er ear enar row vehicles infront ,suc has
bicy cles ormo torc yc les.
In addition, onslipper yroads, braking oracceler -
ating cancause oneorseveralwheels tolose
tr action andtheve hicle could then skid.
Do notuse ActiveDist ance AssistDIS TRONI Cin
th ese situations. &
W W
ARNING ARNING
Riskofaccident from acceler a-
tion orbraking byActiveDist ance Assist
DIS TRONI C
Ac tiveDist ance AssistDIS TRONI Cma yacc el-
er ateor brak ein thefo llo wing cases ,fo r
ex am ple:
R Ifth eve hicle pullsawa yusin gAc tiveDis-
ta nce AssistDIS TRON IC.
R Ifth estor ed speed iscalled upand iscon-
sider ablyfa ster or slowe rth an thecur -
re ntl ydr iven spe ed.
R IfAc tiveDist ance AssistDIS TRONI Cno
long erdetects ave hicle infront ordoes
no tre act toreleva nt obje cts. #
Alwayscar efull yobser vethetra1c con-
ditions andbeready tobrak eat all
times. #
Take intoaccount thetra1c situation
bef orecalling upthestor ed speed. &
W W
ARNIN G ARNIN
GRisk ofaccident duetoinsu1-
cient deceler ationbyActiveDist ance
Assi stDIS TRONI C
Ac tiveDist ance AssistDIS TRONI Cbrak es your
ve hicle withupto50% ofthepossible deceler-
ation. Ifth is deceler ationisno tsu1cien t,
Ac tiveDist ance AssistDIS TRONI Caler tsyou
wit havisu aland acous ticwarning. #
Adjust your speed andmaint ainasuit a-
ble distance from theve hicle infront . #
Brak eth eve hicle yourself and/or take
ev asiv eactio n. &
W W
AR NIN G AR
NIN GRisk ofacciden tif de tection
fun ction ofActiveDist ance Assist
DIS TRONI Cis im pair ed
Ac tiveDist ance AssistDIS TRONI Cdoes not
re act orhas alimi tedre actio n:
R when drivi ng on adi.er entlane orwhen
ch ang inglane s
R topedest rians, anim als,bicycles orsta-
tio nar yve hicles, orune xpect edobs tacles
R tocom plextra1c condi tions
R tooncoming vehicles andcrossin gtra1c
As are sult ,Ac tiveDist ance AssistDIS TRONI C
ma yneit her givewa rnings norinterve ne in
suc hsitu atio ns. #
Alwaysobser vethetra1c conditions
car efull yand react accor dingly. OperOper
ating A ating
Activ ctiv
eDis t e
Dis tance Assis ance
AssistDIS t
DIS TR TR
ONIC ONIC
R R
eq eq
uir uir
ement s: ement
s:
R The electr icpar king brak eis released.
R ESP ®
is activ ated and isno tint erve ning. Dr
iving andparking
167 167

R
The trans missionis in pos ition005B.
R The driver's dooris clo sed .
R Che ckofthera dar sensor system has been
successfull ycom pleted.
R Parking Assist PARK TRON ICisno tbeing used
to par kth eve hicle ortoexitfrom apar king
space. #
T T
o oper o
oper at at
eA e
Activ ctiv
eDist e
Dist ance Assis ance
Assist t
DIS DIS
TR TR
ONIC: ONIC:
press thero ck er switc hesonthe
st ee ring wheel cont rolunit upordown tothe
desir edposition.
A A
ctiv ctiv
ating/ deactiv ating/
deactiv atingA ating
Activ ctiv
eDist e
Dist ance Assis ance
Assist t
DIS DIS
TR TR
ONIC ONIC
#
Press theH button.
A A
ctiv ctiv
ating A ating
Activ ctiv
eDist e
Dist ance Assis ance
Assist DIS t
DIS TR TR
ONIC ONIC
#
T T
o activ o
activ at at
ewit e
wit hout ast hout
astor or
ed speed: ed
speed: press
ro ck er switc h1 upM ordown N, or
select Jwithth eleT rock er switc h.
or #
T T
o activ o
activ at at
ewit e
wit hast h
astor or
ed speed: ed
speed: selectJ
wit hth eleT rock er switc h. #
Remo veyour foot from theacceler ator pedal.
The current spe edisstor ed and maintaine dby
th eve hicle.
A A
dop dop
tingade t tin
gade tect ect
edspeed limit ed
speed limit #
ActivateAc tiveDist ance AssistDIS TRONI C. #
Ifatra1c signhasbeen detected and isdis-
pla yedin theinst rument cluster: select J
wit hth eleT rock er switc h.
The maximum permissible speedonthetra1c
sign isadop tedas thestor ed speed. Thevehi-
cle adap tsits speed tothat of theve hicle in
fr ont ,but onlyup tothestor ed speed.
Pulling awa Pulli
ngawa ywit y
wit hA h
Acti v cti
ve Dist e
Dist ance Assis ance
Assist t
DIS DIS
TR TR
ONIC ONIC
#
ActivateAc tiveDist ance AssistDIS TRONI C
and remo veyour foot from thebr ak epedal. #
Select Jwithth eleT rock er switc h.
or #
Depr esstheacceler ator pedal brie0y and
/r ml y.
The functi onsofActiveDist ance Assist
DIS TRONI Ccontinue tobe car ried out.
Deactiv Deactiv
atingA ating
Activ ctiv
eDist e
Dist ance Assis ance
Assist DIS t
DIS TR TR
ONIC ONIC168168
Dr
iving andparking

&
W W
ARNI NG ARNI
NGRisk ofan accid ent due to
Ac tiveDist ance AssistDIS TRONI Cbeing
acti vewhen youlea vethedr iver's seat
If yo ulea vethedr iver's seat while theve hicle
is bein gbr ak ed byActiveDist ance Assist
DIS TRONI Conl y,theve hicle canrollaw ay. #
Alwaysdeacti vate Ac tiveDist ance Assist
DIS TRONI Cand secureth eve hicle to
pr ev ent itfrom rolling awaybef oreyo u
lea vethedr iver's seat. #
Select Owithth eleT rock er switc h.
% Ifyo ubr ak e, deactiv ateESP ®
or ifESP ®
int er-
ve nes, ActiveDist ance AssistDIS TRONI Cis
deac tivated.
Incr Incr
easing ordecr eas
ing ordecr easing t eas
ing the spee d he
spee d #
1mp h(1 km /h):pr es sro ck er switc h1 up
M ordown N tothepr essur epoint.
or #
5mp h(1 0km /h):pr es sro ck er switc h1 up
M ordown N beyond thepr essur e
point. or #
Acceler ateth eve hicle tothedesir edspeed
and press rock er switc h1 upM.
Changing t Changing
the he
speci/ed speci/ed
dist dist
ance t ance
to t o
the v he
vehicle in ehicle
in
fr fr
ont ont
#
T T
o r o
reduce t educe
the he
speci/ed speci/ed
dist dist
ance: ance:
press the
ri ght rock er switc hup (Ñ). #
T T
o incr o
incr ease t ease
the he
speci/ed speci/ed
dist dist
ance: ance:
press the
ri ght rock er switc hdo wn (Ò).
F F
unction ofA unction
ofActiv ctiv
eSpeed LimitAssist e
Speed LimitAssist
If ach ang ein thespeed limitof12 mph
(20 km/h )or mor eis de tected and automatic
adop tionofspeed limitsis activ ated, thene w
speed limitisaut omaticall yadop tedas thestor ed
speed (/page181).
The driven speed isadjust edwhen theve hicle is
le ve lwit hth etra1c signatthelat est. Inthecase
of signs indicating entryint oan urban area, the
speed isadap tedaccor dingtothespeed permit-
te dwit hin theurban area. The speed limitdispla y
in theInstr ument Displayis alw aysupdat edwhen
th eve hicle isleve lwit hth etra1c sign. If
th er eis no speed restr iction onanunlimited
str etch ofroad (e.g .on afree wa y), there com-
mende dspeed isaut omatical lyadop tedas the
st or ed spee d. Thesy stem uses thespeed stor ed
on anunlimit edstretch ofroad asthere commen -
ded speed. Ifyo udo notalt er thestor ed speed on
an unlimit edstretch ofroad, there commen ded
speed is80 mph(1 30 km/h).
If Ac tiveDist ance AssistDIS TRONI Chas been put
int opas sivemode bypressing theacceler ator
pedal, onlyspeed limitswhichar ehigher than the
se tspeed areadop ted.
Obser vetheno teson drivi ng systems andyour
re sponsi bility;yo uma yot her wise failto recogn ize
dang ers(/ page155) .
Sy st Sy
stem limit s em
limit s
The system limit sof Tra1c Sign Assis tappl yto
th ede tection oftra1c signs(/ page180) .
Spe edlimit sbelo w12 mph(2 0km /h)ar eno t
au tomaticall yadop tedby thesy stem asthestor ed
speed. Temp oraryspeed restr iction s(e .g. fora
cer tain time ordue towe ather cond itions) cannot
be proper lyde tected bythesy stem. Themaxi- Dr
iving andparking
169 169

mum
permissible speedapplying toave hicle with
a trailer isno tde tected bythesy stem.
Ad just thespeed inthese situations. &
W W
ARNIN G ARNIN
GRisk ofaccident duetoActive
Speed LimitAssistada pting theve hicle' s
speed
The speed adoptedby ActiveSpeed Limit
Assi stma ybe toohigh orincor rect insome
indi vidu alcases, suchas:
R atspeed limitsbelo w12 mph(2 0km /h)
R inwe tcondi tions orinfog
R when towing atrailer #
Ensur eth at thedr iven speed complies
wit htra1c regula tions . #
Adjust thedr iving speed tosuit current
tr a1c andweather cond itions. FF
unct ionofr unct
ionofrout out
e-based speed adapt e-b
ased speed adaptatio n atio
n
When ActiveDist ance AssistDIS TRONI Cis acti va-
te d, theve hicle speed willbeadap tedaccor dingly
to thero uteev ents ahead. Depending onthedr ive
pr og ram select ed,theve hicle negotiat es aro ute ev
ent ahead inan economical, comfortable or
dynamic manner.When thero uteev ent has been
passed, theve hicle acceler ates again tothe
st or ed spee d. These tdi st an ce totheve hicle in
fr ont ,ve hicles detected ahead andspeed restr ic-
ti on sah eadar eta ke nint oac cou nt.
Yo ucan activ ateand deactiv atero ute-based
speed adaptation inthemultimedia system
(/ page171).
The follo wing routeeve nts are take nint oac cou nt:
R Cur ves
R T-int ersections, roundabouts andtollplazas
R Turnsand exits
R Tra1c jams ahead (onlywit hLiv eTra1c Infor-
matio n)
% When theto llst ation isreac hed, ActiveDis-
ta nce AssistDIS TRON ICado ptsth espeed as
th estor ed speed.
Also, thespeed isreduced ifth etur nsignal indi-
cat ortochang elane sis switc hedonand one of
th efo llo wing situations isde tected:
R Turning o.atintersections R
Driving onslowing-do wnlanes
R Driving onlanes adjacent toslo wing -down
lane s
The driver isresponsi bleforch oosing theright
spe edand observing other road user s.This
appli esinpar ticu lartointersections, roundabouts
and tra1c lights, asroute-based speedadaptation
does notbr ak eth eve hicle toast ands till.
When routeguidance isactiv e,the/r st speed
adjustmen tis car ried out automaticall y.Ifth etur n
signal indicat orisswitc hedon,theselect edrout e
is con/ rmed and further speed adjustmen tis acti-
va ted.
Speed adaptation iscanc eled inthefo llo wing
cases :
R Ifth etur nsignal indicat orisswitc hedo.
bef oreth ero uteev ent.
R Ifth edr iver depr esses theacceler ator or
br ak epedal during thepr ocess.
Sy st Sy
stem limits em
limits
Ro ute-based speedadaptation does notta ke right
of wa yre gula tions intoac cou nt.The driver is 170170
Dr
iving andparking

re
sponsi bleforcom plying withro ad tra1c regula -
tions anddriving atasuit ablespe ed.
The speedada ptatio nmade bythesy stem may
no talw aysbe suit able, particu larlyin thefo llo wing
situations:
R The road's coursenotclear lyvisi ble
R Road nar rowing
R Varying maximum permissible speedsinindi-
vidual lanes, forex am ple attollplazas
R Wetro ad sur faces, snowor ice
In these situations thedr iver must interve ne
ac cor dingl y. &
W W
ARNI NG ARNI
NGRisk ofaccid ent inspi teof
ro ute-based speedadaptation
Ro ute-based speedadaptation canmalfunc-
tion orbe temp orarily una vailable inthefo l-
lo wing situations:
R Ifth edr iver does notfo llo wthecalculat ed
ro ute
R Ifmap datais no tup-t o-dat eor availabl e R
Intheev ent ofroadw orks
R Inbad weather orroad cond itions
R Ifth eacceler ator pedal isdepr essed
R Intheev ent ofelectr onicall ydispla yed
speed limitations #
Adaptth espeed tothetra1c situation. SeSe
tting r tting
rout out
e-based speedadapt e-based
speedadaptation ation
R R
eq eq
uir uir
ements: ements:
R ActiveDist ance AssistDIS TRONI Cis acti va-
te d.
R ECOAssist isactiv e.
Multimedi asy stem:
4 © 5
Settings 5
Assistance
5 Rou te-based Speed #
Activateor dea ctivateth efunction .
When thefunction isactiv e,theve hicle speed
is adju sted depen dingon thero uteev ents
ahead.
% Further informatio non therout e-based speed
adap tation (/page170) . AA
ctiv ctiv
eSt e
St eer eer
ing Assist ing
Assist FF
unction ofA unction
ofActiv ctiv
eSt e
St eer eer
ing Assist ing
Assist
Ac tiveSt eer ing Assist isonl yav ailabl eup toa
speed of130 mph (210 km/h) .The system helps
yo uto stay inthecent erofthelane bymeans of
moder atesteer ing interve ntions .Dep ending on
th espeed driven, ActiveSt eer ing Assist usesthe
ve hicles ahead andlane marking sas are fere nce.
% Dep ending onthecountr y,in thelowe rspeed
ra ng eAc tiveSt eer ing Assist canusethesur -
ro unding tra1c asare fere nce. Ifnece ssary,
Ac tiveSt eer ing Assist canthen also prov ide
assist ancewhen driving awayfrom thecent er
of thelane, forex am ple, toform are scue
lane .
If th ede tection oflane marking sand vehicles
ahead isim pair ed,ActiveSt eer ing Assist switches
to passiv emode. Thesystem prov ides nosuppor t
in this case.
St St
atus displa atus
display of A y
of Activ ctiv
eSt e
St eer eer
ing Assis ing
Assist int t
in the he
Ins Instr tr
ument Display ument
Display
R Ø (gra y): acti vatedand passiv e
R Ø (gre en): activ ated and activ e Dr
iving andparking
171 171

R
Ø (red): system limits detected
R Ø (white,redhands): "handsonthesteer -
ing wheel" prom pt
% Duringthetransition from activ eto passiv e
st atus, theØ symbol issho wnasenlar ged
and 0ashing. Oncethesy stem ispassiv e,the
Ø symbol issho wnasgray intheInstr u-
ment Displa y.
% Depending ontheselect edvehicle setting s,
Ac tiveSt eer ing Assist maybe una vailable.
S S
t t
eer eer
ing and t ing
and touc ouc
hde t h
de tection ection
The driver isrequ ired tokeep their hands onthe
st ee ring wheel atall time sand beableto inter-
ve ne atanytime tocor rect thecour seoftheve hi-
cle and keep itin lane. Thedriver must expect a
ch ang efrom activ eto passiv emode orvice versa
at anytime . If
th esy stem detects that thedr iver has not
st eer edtheve hicle fora consider ableperiod of
time orhas remo vedth eir hands from thesteer ing
wheel, display1 appear s.Ifth edr iver still does
no tst eer theve hicle, awa rning tone sou nds in
add itionto thevisual warning messa ge.
If th edr iver does notre act tothewa rning fora
consider ableperiod, thesy stem can initiat ean
emer gency stop (/ page173) .
The warning isno tissued orisstopped whenthe
dr iver giv es con/ rmation tothesy stem:
R The driver steer sth eve hicle. R
Depen dingon t Depen
dingon the coun try he
coun try: :
th edr iver presses
a steer ing wheel buttonoroper ates Touc h
Contr ol
If Ac tiveSt eer ing Assist detects that asy stem
limi thas been reac hed, avisu alwa rning isissued
and awa rning tone sou nds.
Obs erve theno teson drivi ng systems andyour
re sponsi bility;yo uma yot her wise failto recogn ize
dang ers(/ page155).
Sy st Sy
stem limit s em
limit s
Ac tiveSt eer ing Assist hasalimit edsteer ing tor-
qu efo rlat eral guidance. Insome cases,th esteer -
ing interve ntion isno tsu1 cienttokeep theve hi-
cle inthelane ortodrive th ro ugh exits.
The system maybe impair edorma yno tfunction
in thefo llo wing instances:
R Ther eis poor visibility ,e.g. duetosno w,rain,
fo g, hea vyspr ay,gr eatl yva rying ambient light
or strong shad owson thero ad.
R Ther eis glar e,e.g .fr om onco mingtra1c,
dir ect sunl ight orre0ectio ns.
R Insu1 cientroad illumin atio n. 172172
Dr
iving and parking

R
The wind shield isdir ty,fo gg ed up, dam aged or
co veredin thevicinity ofthecamer a,e.g. bya
sti cker.
R No, orseveral,unclear lanemarkings arepr es-
ent forone lane, orthemar kings chang e
qu ickl y, forex am ple, inacons tructi onarea or
int ersecti ons.
R The lane marking sar ewo rnawa y,dar kor cov-
er ed up, e.g. bydirtor sno w.
R Ifth edist ance totheve hicle infront istoo
shor tand thus thelane markings canno tbe
de tected.
R The roadis na rrow and wind ing.
R Ther ear eobs tacles onthelane orprojecting
out intoth elane, suchas object markers.
The system doesno tpr ov ide assist anceinthefo l-
lo wing conditions:
R Ontight curvesand when turnin g.
R When crossin gint ersecti ons.
R Atroundabouts ortollst ations.
R When thetir epr essur eis toolow. &
W W
ARNI NG ARNI
NGRisk ofaccid ent ifAc tiveSt eer -
ing Assist unexpect edlyst ops function ing
If th esy stem limits ofActiveSt eer ing Assist
ar ere ac hed ther eis no guar anteethat the
sy stem will remain activeor will keep theve hi-
cle inlane . #
Alwayske ep your hands onthesteer ing
wheel andobser vethetra1c carefull y. #
Alwaysst eer theve hicle paying attent ion
to tra1 cco nd itio ns . &
W W
ARNI NG ARNI
NGRisk ofaccid ent ifAc tiveSt eer -
ing Assist unexpect edlyint erve nes
The detection oflane marking sand obje cts
ma ymalfu nctionand cause unexpect edsteer -
ing interve ntions . #
Steer accor dingtotra1 cco nd itio ns . AA
ct iv ct
ivat ing/ deact iv at
ing/ deact ivat ing A at
ing Act iv ct
ive St e
St eer eer
ing Assist ing
Assist
R R
eq eq
uir uir
ements: ements:
R ESP ®
is activ ated, but isno tint erve ning. R
ActiveDist ance AssistDIS TRONI Cis acti va-
te d.
Multimedi asy stem:
4 © 5
Settings 5
Quick Access #
Select 004FSteering Assist. FF
unction ofA unction
ofActiv ctiv
eEmer g e
Emer gency St ency
Stop Assist op
Assist If
th esy stem detects that thedr iver has not
st eer edtheve hicle fora consider ableperiod of
time orhas remo vedth eir hands from thesteer ing
wheel, display1 appear sin theInstr ument Dis-
pla y.Ifth edr iver still does notst eer theve hicle,
or giv es no con/r mation tothesy stem, awa rning Dr
iving andparking
173 173

to
ne sou nds inadd itionto thevisual warning mes-
sag e.
If th edr iver still does notre spond tothewa rning,
th eBeginning Emergency Stopmessag eappear s
in theInstr ument Display.Ifth edr iver still does
no tre spond ,Ac tiveDist ance AssistDIS TRONI C
re duces thespeed. Thevehicle isdecel erated in
st ag es toast ands till.
Depen dingon thecountr y,at speeds below
40 mph(6 0km /h)th ehazar dwa rning lights
switc hon automaticall y.
When theve hicle isstation ary, thefo llo wing
actions arecar ried out:
R The vehicle issecur edwithth eelectr icpar k-
ing brak e.
R ActiveDist ance AssistDIS TRONI Cis ended.
R The vehicle isunl ocked.
R Ifpossible, anemer gency callis pla ced tothe
Mercede s-Benzemergency callcent er.
The driver can cancel thedeceler ationatanytime
by per form ing one ofthefo llo wing actions:
R Steer ing R
Braking oracceler ating
R Deactiv atingActiveDist ance Assist
DIS TRONI C AA
ctiv ctiv
eLane Chang e
Lane ChangeAssi st e
Assi st FF
unctio nof A unctio
nof Activ ctiv
eLane Chang e
Lane ChangeAssi st e
Assi st
Ac tiveLane ChangeAssi stsupp orts thedr iver
when chang inglane sby appl ying steer ing torq ue
if th edr iver activ ates atur nsignal indicat or.
Obser vetheno teson drivi ng systems andyour
re sponsi bility;yo uma yot her wise failto recogn ize
dang ers(/ page155) .
Assis tance when chang inglane sis prov ided ifall
th efo llo wing conditions areme t:
R Youar edr iving onafree wa yor road withmul-
tip lelane sin thedir ection oftrav el.
R The neighbor inglane issepar ated byabr ok en
lane marking .
R Novehicle isde tected intheadjacent lane.
R The vehicle speed isbe tween 50mph
(80 km/h )and 110 mph(1 80 km/h). R
ActiveLane ChangeAssi stisswi tched onin
th emultimedia system.
R ActiveSt eer ing Assist isactiv ated and activ e.
If no vehicle isde tected intheadjacent laneanda
lane chang eis per mitt ed,thelane chang ebeg ins
aTer thedr iver has activ ated thetur nsignal indi-
cat or.This issho wntothedr iver wit hagr een
ar ro w ne xt to the± steer ing wheel symbol.
The Lane Change tothe Left messag e,forex am-
ple, also appear s.IfAc tiveLane ChangeAssi st
has been activatedwit hth etur nsignal indicat or
but alane chang eis no timmed iatelypossibl e,a
gr ay arro w appear sne xt to the± steer ing
wheel symbol, whichre mains green.
When lanechang eassis tance star ts, thetur nsig-
nal indicat orisaut omaticall yactiv ated along with
th edispla yin theInstr ument Display.
If th eassist ancegraphic issho wnwhen chang ing
lane s,an addit ionalarro w appear sin itpoin ting
to wa rdsth eadjacent lane(/page165).
If alane chang eis no tpossibl e,thear ro w isfaded
out aTer afew secon dsand ane wlane chang e
mus tbe initiat ed. Animmed iatelane chang eis 174174
Dr
iving and parking