engine MERCEDES-BENZ A CLASS 2023 Service Manual

R
Maint ainadist anceof atlea st11.8 in(30 cm)
to theve hicle.
R V V
ehicle swit ehicle
swit hdecor h
decor ativ ativ
ef e
foil: oil:
Parts of your
ve hicle areco veredwit hadecor ativefo il.
Maint ainadist ance ofatleast 27.6in(70 cm)
be tween thefo il-co veredpar tsof theve hicle
and thenozzl eof thepo we rwa sher .Mo vethe
po we rwa sher nozzlearoun dwhils tclean ing.
The waterte mp eratur eof thepo we rwa sher
mus tno tex ceed 140°F(60° C).
R Obser vetheinf ormation onthecor rect dis-
ta nce intheeq uipment manufacturer'soper -
ating instruction s.
R Donotdir ect thenozzl eof thepo we rwa sher
dir ectl yat sensi tivepar ts,suc has tires, gaps,
electr icalcom ponent s,batt eries, light sources
and ventila tion slits. WW
as hing t as
hing the v he
vehi cle b ehi
cle by ha nd y
ha nd *
N NO O
TE TE
Engine damagedue towa tering ress #
Take car eno tto point thewa terje t
dir ectl yto wa rdsth eair inle tgr ille belo w
th ehood. Obser
vetheleg alrequ irements, e.g.inanumber
of countr ies,washing byhand isonl yper mitt edin
special lydesignat edwash bays. #
Use amild clean ingagent ,e.g .car sham poo. #
Washtheve hicle withluk ewarm wa terusing a
soT carspong e.When doingso,donot
ex pose theve hicle todirect sunlight. #
Carefull yhose theve hicle o.withwa terand
dr yusing ach amois.
% Obser vetheno teson thecar eof vehicle
par ts(/ page269). NNo o
t t
es on pain tw es
on pain twor or
k/mat t k/mat
te e
/nish /nish
paintw pain
twor or
kcar e k
car e To
avo iddamaging thepaintw orkand interfering
wit hth edr iving assist ancesystems, please
obser vethefo llo wing notes: P P
aint aint
R Insect remains: soakwithinsect remo verand
ri nse o.thetreat edareas aTer wards.
R Birddr oppin gs:soak withwa terand rinse o.
aT erwa rds.
R Tree resin, oils, fuels and greases: remo veby
ru bbing gentl ywit haclo thsoak edinpe tro-
leum ether orlighter 0uid.
R Coolan tand brak e0uid: remo vewit hadam p
clo thand clean water.
R Tarst ains: usetarre mo ver.
R Wax:use silicone remo ver.
R Donotatt achsti ckers, /lms orsimilar materi-
als. Onlyha ve /lm attached tothebum perat
a qua li/ed specialist workshop.
R Remo vedirtimmediat ely, wher epossibl e.
Mat t Mat
te e
/nish /nish
R Onlyuse carepr oduct sappr oved for
Mer cedes-Be nz.
R Donotatt achstic kers,/lms orsimil armat eri-
als. Onlyha ve /lm attached tothebum perat
a qu ali/ed special istwo rkshop. Main
tenanc eand care
267 267

R
Donotpolish theve hicle andalloywheels.
R Onlyuse carwashes that cor respond tothe
lat est engineer ingstandar ds.
R Donotuse carwash prog ram wit ha/nal hot
wa xtreatme nt.
R Donotuse pain tclean ers, bu1ng orpoli shing
pr oduct s,glo sspreser vers,e.g .wa x.
In theev ent ofpaintw orkdamag e:
R Alwaysha ve paintw orkre pair scar ried out ata
qu ali/ed special istwo rkshop.
R Mak esur eth era dar sensor sfun ction
(/ page155). NNo o
t t
es on cleaning decor es
on cleaning decorativ ativ
ef e
foils oils
Obser
vetheno teson matt e/nish carein the
ch ap ter"No teson pain twork/mat te/nish paint-
wo rkcar e"(/ page267). Theyalso applyto
matt edecor ativefo ils.
Obser vetheno teson clean ingdecor ativefo ils to
avo idvehicle damag e. Clean
ing Clean
ing
R Forcleaning, useplenty ofwa terand amild
cleaning agent without additiv esorabr asiv e
subst ances, e.g.acar sham pooappr ovedfo r
Mer cedes-Be nz.
R Remo vedirtimmediat ely, wher epossibl e,
whils tav oiding rubbing toohar d.Ther eis oth-
er wise arisk ofdamagi ngthedecor ativefo il
ir re par ably.
R Ifth er eis dir ton the/n ish orifth edecor ative
fo ilis dull: UsethePa int Cleaner recommen -
ded andappr ovedfo rMer cedes-Benz.
R Insect remains: Soakwithinsect remo verand
ri nse o.thetreat edareas aTer wards.
R Birddr oppin gs:Soak withwa terand rinse o.
aT erwa rds.
R Toprev ent waterst ains, drya fo il-wr apped
ve hicle withasoT, absorbe ntclo thaTer every
car wash.
Av Av
oiding damag oiding
damag et e
to t o
the decor he
decor ativ ativ
ef e
foil oil
R The service life and color ofdecor ativefo ils
ar eim pair edby:
- Sunl ight -
Temp eratur e,e.g. hotair blower
- Weather cond itions
- Stone chippings anddirt
- Chemica lcleaning agents
- Oilypr oducts
R Donotuse polish onmatt edecor ativefo il.
Po lishing willhave thee.ect ofshining the
fo il-wr apped surface.
R Donottr eat matt eor stru ctur eddecor ative
fo ils wit hwa x.Pe rm anen tst ains mayoccur .
Scr atches, corrosiv edeposi ts,areas a.ect edby
cor rosion anddamag ecaused byincor rect car e
canno talw aysbe com pletely repair ed. Insuc h
cases, visitaqua li/ed specialist workshop.
Yo ucan obtain mor einf ormation oncar eand
cleaning products from themanuf acturer.
In thecase offoil-wr apped surfaces, optical di.er -
ences mayoccur between thesur faces that we re
no tpr otect edbyadecor ativefo ilaTer remo vinga
decor ativefo il. 268268
Maint
enance andcare

Ke
ep childr enawa y. Obser
vethis Oper ator's Manual.
If yo udo notint end touse theve hicle over an
ex tended period oftime :
R Activatestandb ymode ,or
R Connect thebatt eryto abatt erych arge r
appr ovedby Mer cedes-Be nz,or
R Cons ultaqu ali/ed special istwo rkshop todis-
connect thebatt ery NNo o
t t
es on st es
on star ar
ting assist ting
assist anceandc ance
andchar har
ging t ging
the 12 he
12
V batt V
batt ery er
y When
chargin gth ebatt eryand during star ting
assist ance, alwaysuse thejum p-st artconnection
point intheengine compartment. *
N NO O
TE TE
Damag eto thebatt eryfrom over-
vo ltag e When
chargin gusin gabatt erych arge rwit hout
a maximum chargin gvo ltag e, thebatt eryor
th eon-boar delectr onics maybe damag ed. #
Onlyuse batterych arge rs wit hamaxi-
mum chargin gvo ltag eof 14.8 V. &
W W
ARNI NG ARNI
NGRisk ofexplosion duetoigniting
hy drog en gas
If th er eis ashor tcir cuit orspar ksstar tto
fo rm when chargin gabatt ery, ther eis adan-
ge rof thehy drog en gasign iting . #
Take car eth at thepositiv ete rm inal ofa
connect edbatt erydoes notcome into
cont actwithve hicle parts. #
Neverplace metalobjects ortools ona
batt ery. #
When connecting anddisconnecting the
batt ery, alw aysobser vetheseq uence of
batt eryte rm inals descr ibed. #
Alwaysta ke car eto conn ectonlybatt ery
te rm inals ofidentical polaritywhen jump
st ar ting ave hicle. #
Duringstar tin gassis tance, itis ess entia l
to obser vetheseq uence describedfor
conn ectingand discon nectingthe
jum per cable s. #
Donotco nnec tor dis connec tth ebat-
te ry term inals while theengine isrun-
ning. &
W W
ARNI NG ARNI
NGRisk ofexplosion duetoamix-
tur eof explosiv ega ses
A mixtu reofexplosiv ega ses can escape from
th ebatt erydur ing chargin gand jump star tin g. #
Fire ,open 0ames, smokingand creati ng
spar ksmust beavo ided. #
Mak esur eth at ther eis su1cien tve ntila -
tion. #
Donotst and overth ebatt ery. Br
ea kd ow nas sist anc e
281 281

&
W W
ARNI NG ARNI
NGRisk ofexplosion from afrozen
batt ery
A disc hargedbatt eryma yfreeze attemp era-
tur es slightl yabo veorbelo wfreezin gpoint.
Dur ingstar ting assist anceorbatt erych argin g,
batt eryga scan bereleased. #
Alwaysallo wabatt eryto thaw before
ch argin git or per form ing star ting assis -
ta nce. If
th eindicat or/warning lampsintheinst rument
clust erdo notlight upatlow temp eratur es,itis
ve ry likelyth at thedisc hargedbatt eryhas frozen.
In this case youma yneit her jump-st artth eve hi-
cle nor charge thebatt ery.
The service life of abat tery that has been thawe d
ma ybe dramaticall yshor tened. Thestar ting char-
act eristics maybe impair ed,especi allyat low
te mp eratur es.
It is recommen dedthat youha ve ath awe dbatt ery
ch eckedat aqu ali/ed special istwo rkshop. *
N NO O
TE TE
Damag ecaused bynume rous or
ex tended attem ptsto star tth eengine Numer
ousorextended attem ptsto star tth e
engine maydamag eth ecat alytic converter
due tonon-c ombusted fuel. #
Avoid numer ousand extended attem pts
to star tth eengine. Obser
vethefo llo wing points during star ting assis -
ta nce and when chargin gth ebatt ery:
R Onlyuse undamag edjum per cable/c harging
cables withasu1cient cross-section and
insulat edterm inal clam ps.
R Non-in sulatedpar tsof thete rm inal clam ps
must notcome intocont actwithot her metal
par tswhile thejum per cable/c harging cable
is connect edtothebatt ery/jum p-startcon-
nection point.
R The jumper cable/c harging cable mustnot
come intocont actwithan ypar tswhic hma y
mo vewhen theengine isrunning.
R Alwaysmak esur eth at nei ther younor thebat-
te ry iselectr ostaticall ych arge d. R
Keep awa yfrom /reand open 0ames.
R Donotlean overth ebatt ery.
Obser vetheadditional follo wing points when
ch argin gth ebatt ery:
R Onlyuse batterych arge rs tested and
ap pro vedfo rMer cedes-Benz.
R Read thebatt erych arge r's oper ating instruc-
tion sbef orech argin gth ebatt ery.
Obser vetheadditional follo wing points during
st ar ting assist ance:
R Forst ar ting assist ance, onlyuse batteries with
a nominal voltag eof 12 V.
R The vehicles mustno tto uc h.
R Gasoline engine: Gasoline
engine:Onlyaccep tst ar ting assis -
ta nce ifth eengine andexhaus tsy stem are
cold. SS
t t
ar ar
tin gassis t tin
gassis tance andc ance
andchar har
gingt gin
gthe 12 Vbatt he
12 Vbatt ery er
y RR
eq eq
uir uir
emen ts: emen
ts:
R The vehicle issecur edwithth eelectr icpar k-
ing brak e. 282282
Br
eakdo wnassist ance

R
A A
ut ut
omatic tr omatic
transmiss ion: ansmiss
ion:Thetransmiss ionisin
position 005D.
R The vehicle andallelect rical consume rsare
switc hedo..
R The hood isopen . #
Slide cover1 ofpositiv eclam p2 onthe
jum p-st arting connec tionpoi ntinthedir ection
of thear ro w. #
Connect positiveclam p2 onyour vehicle to
th epositiv epole ofthedonor batteryusing
th ejum per cable/c harging cable. Always
begin withpositiv eclam p2 onyour ow n
ve hicle /rst. #
Dur Dur
ingst ing
star ar
tin gassis t tin
gassis tance: ance:
star tth eengine of
th edonor vehicle andrunat idle speed. #
Conne cttheneg ativepole ofthedonor bat-
te ry and ground point 3ofyour ow nve hicle
by using thejum per cable/c harging cable.
Begin withth edonor battery/r st. #
Dur Dur
ingst ing
star ar
ting assist ting
assist ance: ance:
star tth eengine of
yo ur ow nve hicle. #
Dur Dur
ingt ing
the c he
char har
gingpr gin
gpr ocess: ocess:
star tth ech arg-
ing process. #
Dur Dur
ingst ing
star ar
tin gassis t tin
gassis tance: ance:
letth eengines run
fo rse veralminut es. #
Dur Dur
ingst ing
star ar
ting assist ting
assist ance: ance:
beforedisconnect-
ing thejum per cable, switchon anelectr ical
consumer onyour ow nve hicle, e.g.th ere ar
wind owheat eror lightin g.
When thestar ting assist ance/c harging process is
com plete: #
Firs t, re mo vethejum per cable/c harging cable
fr om ground point 3and theneg ativepole of
th edonor battery, then from positiv eclam p
2 and thepositiv epole ofthedonor battery.
Begin each time withth econt acts onyour
ow nve hicle /rst. #
ATer remo vingth ejum per cable/c harging
cable, closecover1 ofpositiv eclam p2.
Fu rther informatio ncan beobt aine dat aquali/ed
special istwo rkshop. RR
eplaci ngt eplaci
ngthe 12 Vbatt he
12 Vbatt ery er
y #
Obser vetheno teson the12 Vbatt ery
(/ page280).
Mer cedes-Benz recommen dsthat youha ve the
12 Vbatt eryre placed ataqu ali/ed special ist
wo rkshop, e.g.at an aut hor izedMer cedes- Benz
Cen ter. Br
ea kd ow nas sist anc e
283 283

#
Vehicles withan aut omati ctransmi ssionmust
no tbe tow- star ted. ElectrElectr
icalfuses ical
fuses NNo o
t t
es on electr es
on electr icalfuses ical
fuses &
W W
ARNIN G ARNIN
GRisk ofaccident andinjurydue
to ove rloaded lines
If yo umanipulat eor bridg eafa ulty fuse orif
yo ure place itwit hafuse withahigher amper -
ag e, theelectr icline could beove rloaded.
This could result ina/r e. #
Alwaysre place faulty fuses withspeci-
/ed newfuses containing thecor rect
am per age. *
N NO O
TE TE
Damag edue toincor rect fuse s Electr
icalcom pone ntsorsystems maybe
damag edbyincor rect fuse s,or their function -
ality maybe sign i/can tly im pair ed. #
Onlyuse fuses that have been approved
by Mer cedes-Be nzand which ha ve the
cor rect fuse rating. Blo
wn fuses mustbereplaced withfuses ofthe
same rating, whichyoucan recogn izebythecolor
and thelabel. Thefuse ratings andfurther infor-
mation tobe obser vedcan befound inthefuse
assignment diagram.
F F
use assignmen tdiag r use
assignmen tdiag ram: am:
onthefuse boxin the
engine compartment (/page289).
* NO NO
TE TE
Damag eor malfunctions causedby
moist ure Mois
turema ycause damag eto theelectr ical
sy stem orcause itto malfun ction. #
When thefuse boxis open, makesur e
th at no mois turecan enterthefuse box. #
When closing thefuse box,mak esur e
th at theseal ofthelid ispositioned cor-
re ctl yon thefuse box. If
th ene wly inser tedfuse alsoblows,ha ve the
cause traced andrecti/ed ataqu ali/ed special ist
wo rkshop.
Ensur eth efo llo wing beforere placing afuse:
R The vehicle issecur edagains tro lling away.
R Allelec trica lcons umersareswitc hedo..
R The vehicle isswitc hedo..
The elect rical fuse sar elocat edinvarious fuse
bo xes:
R Fuse boxin theengine compartment onthe
leT-h andside oftheve hicle, when viewe din
th edir ection oftrav el (/ page289)
R Fuse boxin thefront passeng erfoot we ll
(/ page290)
R Fuse boxin thecent erofthetrunk
(/ page291) Opening
andclosing t Opening
andclosing the fuse bo he
fuse boxin t x
in the engine he
engine
com com
par par
tment tment
RR
eq eq
uir uir
ements: ements:
R Adr yclo thand ascr ewdriver areav ailabl e. Br
eakdo wnassis tance
289 289

VV
ehicle ehicle
identi/cation ident
i/cationplat plat
e,VIN and engine num- e,
VIN and engine num-
ber ov ber
over er
vie w vie
w
V V
ehicle ehicle
identi/cation ident
i/cationplat e plat
e Ve
hicle identi/cation plate(US Aonl y)
1 Maxim umpermissib legross vehicle weight
2 Maximum permissible front axle load
3 Maximum permissible rear axle load
4 Paint code
5 VIN (vehicle identi/cation number) Ve
hicle identi/cation plate(Canada only)
1 Maxim umpermissibl egr oss vehicle weight
2 Maximum permissible front axle load
3 Maximum permissible rear axle load
4 Paint code
5 VIN (vehicle identi/cation number)
The maximum permissible gross vehicle weight is
made upoftheve hicle weight, allvehicle occu-
pant s,thefuel and theload. Themaximum gross
axle weight rating isthemaximum weight that can
be car ried on one axle (front orrear axle). Te
ch nica ldat a
327 327

Do
notex ceed themaximum permissible gross
ve hicle weight orthemaximum gross axle weight
ra ting forth efront orrear axle.
VIN VIN
,eng inenum berand ot ,
eng inenum berand other sign s her
sign s 1
Enginenum berstam ped intoth ecr ankcase
2 VIN (vehicle identi/cationnumber) stam ped
int oth ecr ossmember 3
Platewit hinf ormation aboutemissions test-
ing ,inc ludi ng con/r mati onofem issions
gu idelin es attheU. S. feder alleve las wellas
fo rCalif ornia
4 VIN asalabel atthelowe redg eof thewind-
shield OperOper
ating ating
0uids 0uids
NNo o
t t
es on oper es
on oper ating ating
0uids 0uids
*
N NO O
TE TE
Mer cedes- AMGvehicles #
Obser vetheno tesin theSupplement.
Yo ucould other wise failto recogn ize
dang ers. &
W W
AR NIN G AR
NIN GRisk ofinjuryfrom oper ating
0uids harmfu lto your healt h
Oper ating 0uids maybe poisonous andharm-
ful toyour healt h. #
Obser vethete xt on theor iginal contain-
er swhen using, stor ing ordisposing of
oper ating 0uids. #
Alwaysst or eoper ating0uids sealed in
th eir original container s. #
Alwayske ep childr enawa yfrom oper at-
in g 0uid s. +
ENVIR ENVIR
ONME NT ONME
NTAL NO AL
NOTE TE
Pollution ofthe
en vironment duetoirre sponsi bledisposal
of oper ating0uids Incor
rect disposal ofoper ating0uids can
cause consid erable damag eto theen viron-
ment. #
Dispose ofoper ating 0uids inan environ-
ment allyre sponsi blemann er. Oper
ating0uids include thefo llo wing:
R Fuels
R Lubricants
R Coolant
R Brak e0uid
R Windsh ieldwasher 0uid
R Clim atecont rolsy stem refrig er ant 328328
Te
ch nica ldat a

FF
uel uel
NNo o
t t
es on fuel q es
on fuel quality f uality
for v or
vehicles wit ehicles
withag h
agasoline asoline
engine engine
No tetheinst ruction sabout operating0uids
(/ page328).
* NO NO
TE TE
Damag ecaused bythewr ong fuel Ev
en small amounts ofthewrong fuelcould
re sult indamag eto thefuel system, the
engine andtheemission controlsystem. #
Onlyre fuel with low- sulf urspar k-ignition
engine fuel.
This fuelmaycont ainupto10% ethanol byvol-
ume. Your vehicle issuit able foruse withE10
fuel.
Ne verre fuel with one ofthefo llo wing fuels:
R diesel
R Gasoline withmor eth an 10% ethanol by
vo lume, e.g.E15, E85,E100
R Gasoline withmor eth an 3% methanol by
vo lume, e.g.M15, M30,M85,M100 R
Gasoline withadditiv escont aining metal
If yo uha ve acciden tally re fuel edwith the
wr ong fuel: #
Donotswitc hon theve hicle. #
Con sult aquali/ed specialistwo rkshop. If
th eav ailabl efu el isno tsu1cie ntlylo w in sulf ur,
th is can produce unpleasa ntodor s.
Onl yre fuel with fuel that has atleas tth eoct ane
number speci/ed intheinf ormation labelinthe
fuel /ller 0ap. Othe rw ise, engine outputcanbe
re duced andfuelconsum ption incr eased.
F F
or maximum engineoutput: or
maximum engineoutput: Onlyre fuel using
pr em ium -gra de unleaded gasolin ewit hat leas t
91 AKI/95 RON.
If th ere commen dedfuelis no tav ailabl e,youma y
also temp orarily use regula runlea dedgasolin e
wit han oct ane num berofatleas t87 AKI/
91 RON.This mayre duce engineoutput and
incr ease fuelconsum ption.
Ne verre fuel using gasolin ewit han even lowe r
RO N. *
N NO O
TE TE
Prema tureengine wearthro ugh
unleaded regula rga solin e Im
pair ment ofthelong evity and perform ance
of theengine.
If unleaded premium grade gasolin eis una vail-
able andyouha ve torefuel using unleade d
re gula rga solin e: #
Only/ll thefuel tank tohalf fullwit h
unl eaded regula rga solin eand re/ll as
soon asposs iblewit hun lea ded premi um
gr ade gasolin e. #
Donotdr ive at themaximum design
speed. #
Avoid sudden accelerationandengin e
speeds over3000 rpm. Fu
rther informatio non fuel isavailabl eat thefo l-
lo wing locations:
R Ataga sst ation
R Ataqu ali/ed special istwo rkshop
R US US
Aonl y: A
onl y:At http s://www .mbusa.com 330330
Te
ch nica ldat a

NN
o o
t t
es on additiv es
on additiv esing es
ingasoline (v asoline
(vehicles wit ehicles
witha h
a
g g
asoline engine) asoline
engine)
No tetheinst ruction sabout operating0uids
(/ page328).
* NO NO
TE TE
Damag efrom use ofunsui table
additiv es Ev
en small amounts ofthewrong additivema y
lead tomalfun ctionsoccurring. #
Onlyadd cleaning additives recommen -
ded byMer cedes-Be nztothefuel. Mer
cedes-Benz recommen dsthat youuse brand-
name fuelswithadditiv es.
In some countr ies,thefuel availabl ema yno tha ve
su1cie ntaddit ives. Deposi tscould buildup inthe
fuel injection system asare sult .In this case, in
consult ationwithan aut hor ized Mercedes-Benz
Cent er,mix thefuel withth ecleaning additivere c-
ommen dedbyMer cedes-Be nz.Obs erve theno tes
and mixin gra tios indica tedon theta nk . T T
ank cont ank
cont entand fuelr ent
and fuelrese rve eser
ve
F F
uel t uel
tank tot ank
total capacit y al
capacit y Mod
el Mod
el
All model s1 3.5gal(51.0 liter s) RR
eser v eser
ve fuel t e
fuel tank ank
ModelModel
All models 1.3gal(5.0 liter s) Engine
oil Engine
oil NNo o
t t
es on engine oil es
on engine oil
Obser vetheno teson oper ating0uids
(/ page328). *
N NO O
TE TE
Eng inedamag ecaused byan inco r-
re ct oil /lter,incor rect oil oradditi ves #
Donotuse engin eoils oroil /ltersot her
th an those whic hmee tth especi/c ations
necessar yfo rth epr escr ibed service
int erva ls. #
Donotalt er theengine oiloroil /lter in
or der toachie velong erchang eint erva ls
th an prescr ibed. #
Donotuse addit ives. #
Have theengine oilchang edaTer the
pr escr ibed interva ls. Te
ch nica ldat a
331 331