wheel MERCEDES-BENZ A-CLASS SEDAN 2021 Service Manual

%
Have thedispla yre pair edorreplaced if,for
ex am ple, pixelerro rs consi derablyrestrict its
us e. 360
°came ra Fu
nction ofthesur round viewcamer a
The surround viewcam erais asy stem that con ‐
sis tsof four cam eras. The cam eras coverth e
immed iateve hicle surround ings.The system
assis tsyouwhen youar epar kingor atexits with
re duced visibility ,fo rex am ple.
The views ofthesur round viewcam eraar e
alw aysav ailable whendrivin gfo rw ards up toa
speed ofappr ox.10 mph(1 6 km/h) andwhen
bac king up.
The surround viewcam erais on lyan aid and
ma ysho wadis torted viewof obs tacle s,sho w
th em incor rectly ornotsho wthem atall. Itis no t
a subs titutefo ryo ur att entio nto thesur round‐
ing s.The responsibili tyforsaf emaneu vering and
pa rking remains withyo u. Mak esur eth at ther e
ar eno per sons, animals orobjec tsetc., inthe
maneu vering area while ma neu vering and park‐
ing. The
system evaluat esimag esfrom thefo llo wing
cameras:
R Rear vie wcam era
R Front camer a
R Twoside camer asintheoutside mirrors
% Youcan open theco verof there ar vie wcam ‐
er aman ually(/ page18 9).
Vi ew sof thesur round viewcamer a
Yo ucan selectfrom differe nt vie ws: 1
Wide-ang levie w, front
2 Topvie wwit himag efrom thefront camer a 3
Topvie wwit himag esfrom theside camer as
in theoutside mirrors
4 Wide-ang levie w, rear
5 Topvie wwit himag efrom there ar vie wcam ‐
er a
6 Topvie wwit htrailer view(vehicles witha
tra iler hitch)
To pvie w 1
Lane indicati ngthero uteth eve hicle will
ta ke atthecur rent steer ing wheel angle
2 Warning displa yof Parking Assist
PA RK TRONI C
3 Your vehicle from above Dr
iving and parking 18
7

The
color oftheindividual segmentsof wa rning
displa y2 isbased onthedis tance tothede tec‐
te dobs tacle :
R Yello wsegment s:obs tacle sat adi st anc e
be tween appr ox.2.0 ft(0.6 m)and 3.3ft
(1 .0 m)
R Orang esegment s:obs tacle sat adi st anc e
be tween appr ox.1. 0 ft (0.3 m)and 2.0ft
(0.6 m)
R Redse gme nts: obstacle sat ave ry shor t
dis tance ofapprox .1. 0 ft (0.3 m)orless
When Parking AssistPA RK TRONI Cis operatio nal
and noobj ectis de tected, thesegment sof the
wa rning displa yar esho wningray . Guide
lines 1
Yello wlane markingth ecour sethetir es will
ta ke atthecur rent steer ing wheel angle
(dynamic)
2 Yello wguide line,vehicle width(dr iven sur‐
fa ce) dep endi ngon thecur rent steer ing
wheel angle(dynamic)
3 Redguide lineatadis tance ofapprox imat ely
1. 0 in (0.3 m)from there ar area
4 Markat adis tance ofapprox .3.3 ft(1.0 m)
% When ActivePa rking Assistis act ive, lane
mar kings1 aredispla yedin green. The
guide linesinthemedia displaysho w
th edis tances toyour vehicle. Thedistances
ap ply toroad leve l.
Side viewof themir rorca mer as
The side sof theve hicle canbeseen inthis vie w. 1
Guide lineofextern al vehicle dimensions
wit houtside mirrors folded out
2 Markerof thewheel contact poi nts
Sy stem failur e
If th esy stem isno tre ady foroper ation, thefo l‐
lo wing mess ageappear sin themedia display: 18
8
Driving and parking

select
thecor responding transmission posi‐
tion.
Ve hicl eswith automatic transmiss ion:
The vehicle drives intoth eselect edpar king
space.
% During thepar king procedur ewit hAc tive
Pa rking Assist, th elane marking sar edis‐
pla yedin green inthecamer aimag e.
On com pletion ofthepar king procedur e,the
Ø Parking AssistFinished, TakeContro lof
Vehicle displaymessag eappear s.Fu rther
maneuv ering mayst ill be nec essar y. #
Aftercom pletion ofthepar king procedur e,
saf eguar dth eve hicle agains tro lling away.
When requ ired bylegalrequ iremen tsor local
con dition s:tur nth ewheels towa rdsth ecurb.
% Youcan stop theve hicle andchang eth e
tr ans missi on positio ndu ring thepar king pro‐
cedur e.The system then calculat esane w
ve hicle path.Ifno newvehicle pathis availa‐
ble, thesy stem can chang eth etransmission
position again orcanc elthepar king proce‐
dur e. Exiting
apar king space withAc tiv ePa rking
Assis t
Re quirement s:
R The vehicle hasbeen parkedwit hAc tive
Pa rking Assist.
% Depe ndingon theve hicle's equipment, the
butt onmayalso belocat edatadif fere nt
po sitio non thecent ercon sole.
Please note that youar ere sponsible forth eve hi‐
cle and surround ingsdur ing theent ire par king
pr ocedur e. #
Startth eve hicle. #
Press butt on1.
The media displaysho wsthevie wof Active
Pa rking Assist. Dr
ivin gand parking 19
7

Dur
ing normalop erati on, thecoolant tem‐
per atur edisp lay is per mitt edtorise to
24 8°F (120°C).
Ve hicles with48 Von-boar delectr icalsys‐
te m: POWER andCHARGE displ ay(elect rical
dr ive su ppo rtand recup erati on powe rof the
electr icmo tor)
8 Select eddrive pr ogr am
9 Select edtransmiss ionposi tion
A Multifunction display (e xa mp le:standar ddis‐
pla yfo rtr ip) :Assis tance/T elep hone /Naviga‐
tion /Trip/Media/R adio/Stylesanddis‐
pla ys/Ser vice
B Fuelleve l,fuel filler flap locatio nind icat or,
ra ng e Ov
erview ofthebut tons on thest eer ing
wheel 1
P Back/Hom ebutt on(press and hold),
on- boar dcom puter
2 Touc hCon trol, on-bo ardco mp uter
3 Con trol pan elforcr uis econtr olor Active
Dis tance AssistDIS TRONI C 4
Contr olpa nel forth eMBUX multimedia sys‐
te m (/ page208)
£ Voice Cont rolSy stem
5 00E2 Tocal lup thehome screen ofthemul‐
timedia system
6 Touc hCon trol mult imed iasystem
7 0038 Backbutt on(multimedia system)
8 Brightn esscontrol to adjus tth elighting in
th eIns trument Displayand inthecon trol
element sof theve hicle interior Oper
ating theon-boa rdcom puter
Obser vetheleg alrequ iremen tsforth ecount ry
in whic hyo uar ecur rently drivi ng when operat‐
ing theon- boar dcom puter. Ins
trument Displayand on-boar dcom puter 203

&
WARNIN GRisk ofbeco ming trap ped
du ring adjus tment ofthedr iver's seat
af te rcall ing upadr iver profile
Selecting auser profile ma ytrigg eran
adju stment ofthedr iver's seat totheposi‐
tion save dunder theuser profile. Youor
ot her vehicle occupants couldbeinjur edin
th epr ocess. #
Mak esur eth at when theposition of
dr iver's seat isbeing adjustedusing the
multime diasystem, nopeople orbody
par tsarein theseat's rang eof mo ve‐
ment.
If th er eis arisk ofsomeone becoming trap‐
ped, stop theadjus tmentpr ocess immedi‐
at ely: #
a)Tapth ewa rning mess ageon the
media display.
or #
b)Press amemor yposition buttonora
seat adjus tmentswitc hon thedr iver's
door .
The adjus tmentpr ocess willbestop‐
ped. The
driver's seat iseq uipped withan access pre‐
ve nter.
If th edr iver's door isopen, thedr iver's seat will
no tbe setaf te rcall ing upthedr iver's profile.
Pr ofiles stor eyo ur vehicle settin gsand settin gs
fo rth emultimedia system. Ifth eve hicle isused
by severaldr iver s, thedr iver can select their
ow npr ofile wi thout chang ingthestor ed profile
se ttings ofother driver s.
% Information onprofiles from Mer cedes me
conn ectcan befound intheDigita lOper a‐
to r's Manua l.
Ve hicle settin gsare, forex am ple, driver' sseat ,
st eer ing wheel andmirrorse ttings, climatecon‐
tr ol and amb ient lighti ng.Forth ese ttings ofthe
multime diasystem, youcan select,fo rex am ple,
ra dio statio ns,pr ev ious destination sas wellas
th emes, suggestion sand favo urites. Fo
rre cur ring drivi ng situa tions, such aslon g
dr ives on thefree wa y,yo ucan save your prefer‐
re dse ttings inath eme intheve hicle. Inath eme
yo ucan save thedispla yof thedigit almap, your
pr efer redra dio statio nand prefer reddr ive pr o‐
gr am, forex am ple.
The vehicle canlearnth ehabits ofthedr iver .It
th en offers sugg estions forth emos tpr obable
na vig ation destinat ions, media sources, radio
st atio nsorcon tacts. Thepre-r equir ementsfor
th at areth eselect ionofapr ofile, your consen t
to there cor ding ofdata and sufficie ntcoll ected
da ta.
Fa vourites prov ide quick acc ess toapplic ations
th at areused often. Youcan selectfavo urites
fr om categor iesoradd them direct lyto an appli‐
cat ion. 21
6
MBUX multimedia system

If
no connection canbemade totheemer gency
ser vice sei th er,a cor responding message
appea rsinthemedia display. #
Dialth elocal emergency num beron your
mob ilephon e.
If an eme rgency callhas been initiat ed:
R Remain intheve hicle ifth ero ad and traffic
condi tions permit youto do sountil avo ice
con nection ises tablished withth eemer‐
ge ncy callcent eroperator.
R Bas edon thecall, theoper ator decides
whe ther itis neces saryto cal lre scue teams
and/ orthepolice totheacciden tsit e.
R Ifno vehicle occupant answers, an ambu‐
lance issent totheve hicle immediat ely. Tr
igg ering ama nual Mercedes-B enzemer ‐
ge ncy call #
Touse theSOS buttonin theov erhead
contr olpa nel: press and hold theSOS but‐
to nfo rat lea stone second (/page232). #
Touse voice contr ol:use theVo ice Cont rol
Sy stem voice com mand s. The
emer gency callha sbe en ma de:
R Avo ice con nection ismade totheMer cedes-
Benz emergency callcent er.
R Ames sage withacc iden tdat ais transm itted
to theMer cedes- Benzemergency callcent er.
The Mercedes-Be nzeme rgency callcent er
can trans mit theve hicle position datato one
of theemer gency callcent ers.
R Remain intheve hicle ifth ero ad and traffic
condi tions permit youto do sountil avo ice
con nection ises tablished withth eemer‐
ge ncy callcent eroperator .
R Bas edon thecall, theoper ator decides
whe ther itis neces saryto cal lre scue teams
and/ orthepolice totheacciden tsit e.
If no con nect ioncan bemade totheemer gency
ser vice sei th er,a cor responding message
appea rsinthemedia display. #
Dialth elocal emergency num beron your
mob ilephon e. End
inganunin tentionall ytrigg ered manu al
Mer cedes-Benz emergency call #
Select 0076onthemultifunc tionsteer ing
wheel. Depressthebutt onforse veralsec‐
onds . Data
transf eroftheMer cedes- Benzemer‐
ge ncy callsystem In
theeve ntofan automatic ormanua lemer‐
ge ncy callth efo llo wing datais transmit ted, for
ex am ple:
R Vehicle's GPSposition data
R GPS position dataon thero ute
( (a few hund redme ters )befor eth einciden t)
R Direct ion oftrav el
R Vehicle identif ication number
R Vehicle drive type
R Number ofpeop lede term ined tobe inthe
ve hicle
R Whe ther Mer cedes meconnect isavailable
or not 24
0
MBUX multimedia system

ASS
YSTPL US service interva ldisp lay Fu
nction oftheASS YSTPL US service interva l
displ ay The
ASSYSTPL US service interva ldispla yon the
Ins trument Displaypr ov ides informatio non the
re maini ngtime ordis tance before thene xt
ser vice duedate.
Yo ucan hide this ser vice displa yusing thebac k
butt ononthelef t-hand sideofthesteer ing
wheel.
Depen dingonhowtheve hicle isused, the
ASS YSTPL US service interva ldispla yma y
shor tenth eser vice interva l,e.g. inthefo llo wing
cases :
R Mainl yshor t-dis tance drivi ng
R Whe nth eengine isoftenleft idling forlong
per iods
R Intheeve ntoffreq uent col dstar tphase s
Mer cedes-Ben zre comme ndsavoiding such
oper ating condit ions.
Yo ucan obtain informat ionconcernin gth eser v‐
icing ofyour vehicle from aqu alif ied spec ialist wo
rkshop, e.g.anaut hor ized Mercedes-Benz
Cent er. Displa
yingtheser vice dueda te On-boar
dcom puter:
4 Service 5
ASS YST PLUS
The next ser vice duedateis displa yed. #
Toexitth edisp lay: press thebac kbutt on
on thelef t-hand sideofthesteer ing wheel.
Bear inmind thefo llo wing relat ed topic:
R Oper ating theon- board computer
(/ page203). Inf
ormat iononregular maintenance work *
NO
TEPrema turewe arthro ugh failur eto
obser veser vice duedates Maint
enance workwhic his no tcar ried out at
th eright time orincom pletely ca nlead to
inc reased wearand damag eto theve hicle. #
Adher eto thepr escr ibed service inter‐
va ls. #
Alw aysha ve thepr escr ibed maint e‐
nanc ewo rkcar ried out ataqu alif ied
spec ialistwo rkshop. Special
service requ irement s The
prescr ibed service interva lis based onnor ‐
mal opera tionoftheve hicle. Maintenance work
will needto be per form ed mor eof tenif th eve hi‐
cle isoper ated under arduous conditions or
incr eased loads.
The ASSYSTPL US service interva ldispla yis onl y
an aid. Thedriver oftheve hicle bearsre sponsi‐
bility asrega rdsto whe ther maint enanc ewo rk
nee dstobe per form ed mor eof tenth an spec i‐
fi ed based ontheactual operating conditions
and/or loads.
Ex am ples ofarduous operating conditions :
R regular citydriving withfreq uent intermedi‐
at estops
R mainly short-distance drivi ng 25
0
Ma intena nce and care

Chec
kingthebr ak epa dth ickness #
Bring theve hicle andwheels intoasuit able
position sothat youcan positionth ega ug e.
% The positionto place gaug e3 depen dson
th eeq uipment. Dependingonthebr ak ecali‐
per used, correct poi nt3 iseith er inthe
middl eor attheside ontheupper endofthe
br ak epad. #
Switc hof fth eengine. #
Secur eth eve hicle agains tro lling away. #
Take thega ug eout oftheve hicle document
wa lletin theglove box. #
Place thega ug ebe tween thewheel's spokes
in position 3onthebr ak epad. #
Hold thega ug eve rticall yto thebr ak edisc
and slide measur ingpin 2ontobr ak edisc
1. #
Chec kwhic hcolor field 4thear row on
measur ingpin ispointing to.
Gr een :th ebr ak epad thickn ess issuf ficie nt.
Re d:thebr ak epad thickn ess isno tsuf ficie nt.
Ha ve thebr ak epads checkedat aqu alif ied
spec ialistwo rkshop.
% Toavo idan inac cura temeasu rement :
R Mak esur eth ewheels aresuit ablyposi‐
tion ed.
R Inthecase ofper fora tedbr ak ediscs, do
no tput themeasur ingpin onone ofthe
bor esinthebr ak edisc. Cleaning
andcare No
teson washing theve hicl ein acar wash &
WARNIN GRisk ofacci dent dueto
re duced braking effect afte rwa shing the
ve hicle
The braking effect isreduced afte rwa shing
th eve hicle. #
Afterth eve hicle hasbeen washed,
br ak ecar efully whilepaying attention to
th etraf fic condi tions untilth ebr aking
ef fect hasbee nful lyrestor ed. *
NO
TEDama gefrom automatic braking If
one ofthefo llo wing functionsis switc hed
on, theve hicle brak es aut omatically incer‐
ta in situat ions:
R ActiveBr ak eAssi st
R ActiveDis tance AssistDIS TRONI C
R HOLD functio n
R ActivePa rking Assist Maint
enanceand care25
7

Maint
ainadis tance ofat leas t27 .6 in
(70 cm) between thefo il-c ove redpar tsof the
ve hicle andthenoz zleofthepo we rwa sher .
Mo vethepo we rwa sher nozzlearound whilst
cleaning. Thewaterte mp eratur eof the
po we rwa sher mustno texc eed 140°F
(60°C ).
R Obse rveth einf ormation onthecor rect dis‐
ta nce intheim plement manufacturer'soper‐
ating instruction s.
R Donotdir ect thenoz zleofthepo we rwa sher
dir ectl yat sensitiv epar ts,e.g. tires, gaps,
elect rical com pone nts,batter ies, light sour‐
ces and ventil ation slits. Wa
shing theve hicl eby hand *
NO
TEEngi nedama gedue towa ter
ingr ess #
Take car eno tto point thewa terje t
dir ectly towa rdsth eair inle tgr ille belo w
th ehood. Obser
vetheleg alrequ iremen ts,e.g. inanumb er
of coun tries, washing byhand isonl yper mitt ed
in specially designatedwash bays. #
Use amild cleaning agent, e.g.carsham poo. #
Washtheve hicle withluk ewa rmwaterusi ng
a sof tcar spong e.When doingso,donot
ex pose theve hicle todirect sunlight . #
Carefully hosetheve hicle offwit hwa terand
dr yusi ng ach amois .
% Obse rveth eno teson thecar eof vehicle
par ts(/ page26 1). No
teson paint work/ma tte finish paint work
car e Obse
rveth eno teson cleaning andcareto avo id
damagin gth epaintw ork.
Pa int
R Insect remains: soakwithinsect remo verand
ri nse offth etreat edareas afte rw ards.
R Birddr oppin gs:soak withwa terand rinse off
af te rw ards. R
Tree resin, oils, fuels andgreases: remo veby
ru bbing gentl ywi th aclo thsoak edinpe tro‐
leum ether orlight erfluid.
R Coolan tand brak efluid: remo vewit hadam p
clo thand clean water.
R Tarst ains :use tarre mo ver.
R Wax:usesilicone remo ver.
R Donotatt achsticke rs,fi lms orsimilar mate‐
ri als.
R Remo vedirtimmediat ely,wher epossible.
Mat tefinish
R Onlyuse carepr oducts approvedfo r
Mer cedes-Ben z.
R Donotpolish theve hicle andalloywheels.
R Onlyuse carwashes that cor respond tothe
lat estengin eering standar ds.
R Donotuse carwash progr ams withafinal
ho twa xtrea tment.
R Donotus epa int cleane rs,buf fing orpolish‐
ing prod ucts ,gl oss preser vers,e.g. wax.
R Alw aysha ve paintw orkre pair scar ried out at
a qu alif ied spec ialistwo rkshop. 260
Maintenance andcare

&
WARNIN GRisk ofburnsfrom theta il‐
pipe andtailpipe trims
The exhaus tta ilpipe andtailpipe trims can
becom eve ry hot.Ifyo uco me intoco ntact
wit hth ese partsof theve hicle, youco uld
bur nyo urself . #
Alw aysbe par ticular lycareful arou nd
th eta ilpipe andtheta ilpipe trims and
super visechildr enespec iallycloselyin
th is area. #
Allo wvehicle partsto cool down before
to uc hin gth em. To
avo iddamag eto theve hicle, observethe
no teson cleaning andcareof thefo llo wing vehi‐
cle parts:
Wheels andrims
R Use waterand acid-free alloy wheel cleaners.
R Donotuse acidic alloywheel cleanersto
re mo vebrak edus t.This could damag ewheel
bolts andbrak ecom ponen ts.
R Toavo idcor rosion ofthebr ak ediscs and
br ak epads, drive th eve hicle fora fe w minut
esafte rclea ning beforepar king it.The
br ak ediscs andbrak epa dswarm upand dry
out .
Wi ndo ws
R Clean thewindo wsinsid eand outs idewitha
dam pclo thand withacle anin gag ent recom‐
mend edforMer cedes-Benz.
R Donotuse dryclo thsor abr asiv eor sol vent-
ba sed cleani ng agents tocle an theinside of
windo ws.
Wi per blades
R Movethewiper arms intoth ere placemen t
position (/page11 5).
R With thewiper arms folded out,clean the
wiper blades withadam pclo th.
R Donotcle an thewiper blades tooof ten.
Ex terior light ing
R Clean thelenses withawe tsp ong eand mild
cle ani ng agent, e.g.car shampoo.
R Onlyuse cleaning agents orcleaning cloths
th at aresuit able forpla stic lens es. Sensor
s
R Clean thesensor sin thefront and rear
bum perswit hasof tclo thand carsham poo
(/ page15 2).
R When using apo we rwa sher ,maint ainamini‐
mum distance of11.8 in(30 cm).
Re ar vie wcamer aand surround viewcamer a
R Open thecamer aco verwit hth emultimedia
sy stem (/ page18 9).
R Usecle an waterand asof tclo thtocle an the
came ralens .
R Donotuse apo we rwa sher .
Ta ilpip es
R Clean withaclean ingagent recomme nded
fo rMer cedes-Benz, especiallyin thewint er
and afte rwa shing theve hicle.
R Donotuse acidic cleaning agents. 262
Maintenance andcare