2023 MERCEDES-BENZ A CLASS engine

R
When theengine isoTen leTidling forlong
per iods
R Oper ation inpar ticular lydust ycondition s
and/or ifair -recir culation modeisfreq uentl y
used
In these orsimilar operating conditions, have the
int erior air/lter,air /lter,engine oiland oil/lter,
fo rex am ple, chang edmor efreq uen tly. The tires
must becheckedmor efreq uentl yif th eve hicle is
oper ated und erincr eased loads. Further informa-
tion canbeobt aine dat aqu ali/ed special istwo rk-
shop. Bat
t Bat
ter er
ydiscon nectionper y
discon nectionperiods iods
The
ASSYST PLUS service interva ldispla ycan cal-
culat eth eser vice duedateonl ywhen thebatt ery
is connect ed. #
Displa yand note down theser vice duedate
on theinst rument displa ybef oredisconne ct-
ing thebatt ery(/ page257). Engine
com Engine
compar par
tment tment
Opening
andclosing t Opening
andclosing the hood he
hood &
W W
ARNIN G ARNIN
GRisk ofaccident duetodriving
wit hth ehood unlocked
The hood mayope nand blockyour vie w. #
Neverre lease thehood when driving. #
Beforeev erytrip, ensur eth at thehood is
loc ked. &
W W
ARNIN G ARNIN
GRisk ofaccident andinjury
when openingand closin gth ehood
The hood maysuddenl ydr op intoth eend
position.
Ther eis arisk ofinjuryfo ran yone inthe
hood's rang eof mo vement. #
Donotopen orclose thehood ifth er eis
a per son inthehood's rang eof mo ve-
ment. &
W W
ARNIN G ARNIN
GRisk ofbur nswhen openin gth e
hood
If yo uopen thehood intheev ent ofan ove r-
heat edeng ineor/rein theengine compart-
ment, thefo llo wing situations mayoccur :
R Youma ycome intocont actwithho tga ses.
R Youma ycome intocont actwithot her
escapin gho toper ating0uids. #
Beforeopen ingthehood, allowthe
engine tocool down. #
Intheev ent ofa/r ein theengine com-
par tment, keep thehood closed andcall
th e/r eser vice. &
W W
ARNIN G ARNIN
GRisk ofinjur ydue tomo ving
par ts
Com ponen tsintheengine compartment may
continue torunor star tune xpectedl yev en
when thedr ive sy stem isswitc hedo..
Obser vethefo llo wing ifyo umust open the
hood: 258258
Main
tenanc eand care

#
Switcho. theve hicle. #
Neverto uc hth edang erzones surround-
ing moving components, e.g.thero tation
ar ea ofthefa n. #
Remo vejewe leryand watches . #
Keep items ofclo thing and hair away
fr om moving parts. &
W W
AR NIN G AR
NIN GRisk ofinjuryfrom touc hing live
com ponents
The ignition system and thefuel injection sys-
te m oper atewit hahigh voltag e. Youcould
re ceiv ean elect ric shoc k. #
Neverto uc hcom ponents oftheignition
sy stem orfuel injection system when the
ve hicle isswitc hedon. The
livecom pone ntsincl ude thefo llo wing, for
ex am ple:
R Ignition coils
R Fuelinject ors R
Electr iclines totheignition coilsandthefuel
inject ors &
W W
ARNING ARNING
Riskofbur nsfrom hotcom po-
nent partsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. &
W W
ARNIN G ARNIN
GRisk ofinjur yfrom using the
wind shield wiperswhen thehood isopen
If th ewindshield wipersst ar tmo ving when the
hood isopen ,yo ucould betrapped bythe
wiper linkage . #
Alwaysswitc ho. thewindshield wipers
and theve hicle /rst ifyo uneed toopen
th ehood. Opening
t Opening
the hood he
hood #
Torelease thehood, pullonhandle 1. Maint
enance andcare
259 259

#
Push yello whandle 1onthehood catchto
th eleT asfaras itwill go(palm down wards).
LiT thehood untilitis aut omaticall yra ised by
th epneumatic spring.
Closing t Closing
the hood he
hood #
Lowe rth ehood andletit dr op from aheight of
appr oximat ely8 in (20 cm). #
Ifth ehood canstillbeliTed slightl y,open the
hood again and close itwit halit tle forc euntil
it eng ages cor rectl y. Engi
neoil Engi
neoil ChecChec
kingt king
the eng ineoillev he
eng ineoillevel using t el
using the on-bo ard he
on-bo ard
com com
put put
er er
R R
eq eq
uir uir
ement s: ement
s:
R The enginehas been warmed up.
R The vehicle ispar kedon aleve lsur face.
R The engineisrunning atidle speed.
R The hoodis clo sed .
The engine oilleve lis de term ined during driving.
De term ining theengine oilleve lcan take up to
30 minut eswithanor mal driving styleand even
long erwit han activ edr iving style. On-boar
dcom puter:
4 Service 5
Engine OilLevel
One ofthefo llo wing messa geswill appear onthe
inst rument displa y:
R Measuring EngineOil Level... :meas urement
of theoil leve lis no tye tpos sible. #
Repeat there qu est aTer amaximum of
30 minut es'driving.
R Engine OilLevel OKand thebar displa yfo r
indicating theoil leve lon theinst rument dis-
pla yis green and isbe tween "min" and"max":
th eoil leve lis cor rect.
R Engine OilLeve lAdd 1,1qts. andthebar dis-
pla yfo rindicating theoil leve lon theins tru-
ment displa yis orang eand isbelo w"min": #
Add1.1 USqt(1l)of engin eoil.
R Red uce Engine OilLevel andthebar displa y
fo rindicating theoil leve lon theinst rument
displa yis orang eand isabo ve"max": 260260
Main
tenanc eand care

#
Drain o.anyex cess engineoilthat has been
added. Todo so, consult aqua li/ed specialist
wo rkshop.
R For Engine OilLeve lSwi tch Ignition On #
Switchon theve hicle tocheckth eengine oil
le ve l.
R Engine OilLevel System Inoperative: Theoil
le ve lsensor isdef ectiv eor notconnect ed. #
Consult aqua li/ed specia listworkshop.
R Engine OilLeve lSys tem Currentl yUnav ail. #
Close thehood.
T T
opping upengine oil opping
upengine oil &
W W
ARNIN G ARNIN
GRisk ofbur nsfrom hotcom po-
nent partsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. &
W W
ARNIN G ARNIN
GRisk of/reand injur yfrom
engine oil
If engine oilcomes intocont actwithho tcom-
ponent partsintheengine compartment, it
ma yignit e. #
Mak esur eth at no eng ineoilisspill ed
ne xt to the/ller opening. #
Allo wtheengine tocool o.and thor -
oughl yclean theengine oilfrom com po-
nent partsbef orestar ting theve hicle. *
N NO O
TE TE
Eng inedamag ecaused byan inco r-
re ct oil /lter,incor rect oil oradditi ves #
Donotuse engin eoils oroil /lterswhic h
do notcor respond tothespeci/c ations
ex plicitl ypr escr ibed forth eser vice inter-
va ls. #
Followtheinst ruction son theser vice
int erva ldispla yfo rch ang ingtheengine
oil and obser vethepr escr ibed chang e
int erva ls. #
Donotuse additiv es. *
N NO O
TE TE
Damag ecaused byre/lli ng too
muc hengi neoil To
omuc hengin eoil can damag eth eengine or
th ecat alytic converter . #
Have excess engineoilremo vedat a
qu ali/ed special istwo rkshop. %
Depen dingon drivi ng style, theve hicle con-
sumes upto0.9 USqt(0.8 liter) ofoil per
600 miles (1000 km).Theoilconsum ption
ma ybe higher than this when theve hicle is
ne wor ifyo ufreq uentl ydr ive at high engine
speeds. Maint
enance andcare
261 261

#
Turn cap 1count er-cloc kwise andremo veit. #
Addengin eoil. #
Replace cap1and turnit cloc kwise untilit
eng ages. #
Chec kth eoil leve lag ain (/ page260). ChecChec
kingt king
the coolant lev he
coolant level el
&
W W
ARNIN G ARNIN
GRisk ofbur nsfrom hotcom po-
nent partsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. &
W W
ARNIN G ARNIN
GRisk ofscalding from hotcool-
ant
If yo uopen thecap, youcould bescalde d. #
Letth emo torcool down beforeopening
th ecap. #
When opening thecap, wearprotectiv e
glo vesand safetygl asses. #
Open thecap slowly torelease pressur e. #
Park theve hicle onaleve lsur face. #
Chec kth ecoolant temp eratur edispla yin the
inst rument cluster.
The coolant temp eratur emust beinthebo t-
to m quarterof thete mp eratur edispla y. #
Slowly turncap 1count er-cloc kwiseto
re lease overpressur e. 262262
Main
tenanc eand care

#
Continue turning cap1count er-cloc kwise
and remo veit.
The coolant leve lis cor rect inthefo llo wing cases :
R Ifth eengine iscold, thecoolant isup to
mar kerbar 2.
R Ifth eengine iswa rm,th ecoolant isup to
0.6 in(1.5 cm)overth emar kerbar 2. #
Ifnecessar y,add coolan tth at has been
appr ovedfo rMer cedes-Benz.
% Further informatio non coolan t(/ page332) RR
e/lli ng e/lli
ngt t
he wind shield w he
wind shield washer syst asher
system em
&
W W
AR NIN G AR
NIN GRisk ofbur nsfrom hotcom po-
nen tpar tsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. &
W W
ARNIN G ARNIN
G‑Risk of/reand injur yfrom
windshield washer conce ntrate
Wi ndsh ieldwasher conce ntrate ishighl y0am-
mable. Itcould igniteif it comes intocont act
wit hho tengine component partsor the
ex haus tsy stem. #
Mak esur eth at no wind shield washer
conce ntrate spill sout next to the/ller
opening. #
Remo vecap 1bytheta b. #
Addwa sher 0uid.
% Further informatio nabout thewindshield
wa sher 0uid(/page333) Main
tenanc eand care
263 263

KK
eeping t eeping
the air he
air-w -w
at at
er duct fr er
duct free ee
#
Keep thear ea between thehood andthe
wind shield free ofdeposi ts,e.g.ice, snowand
lea ves. ChecChec
kingt king
the br he
brak ak
epad t epad
thic hic
kness kness #
Bring theve hicle andwheels intoasuit able
posit ionsothat youcan position thega ug e.
% The positioning ofgaug e3 depends onthe
ve hicle equipme nt.The gaug eis positioned at
point 3,whic his locat edeither inthecent er
of thebr ak epad orattheupper endtothe
side, depen dingon thebr ak ecaliper . #
Switc ho. theengine. #
Secur eth eve hicle agains tro lling away. #
Take thega ug eout oftheve hicle docume nt
wa lletin theglo vebox. #
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 /eld4thear ro w on
measur ingpin ispoin tingto .
Gr Gr
een: een:
thebr ak epad thickness issu1cien t.
R R
ed: ed:
thebr ak epad thickness isno tsu1cien t.
Ha ve thebr ak epads checkedat aqu ali/ed
special istwo rkshop. %
Toavo idan inaccur atemeasur ement:
R Mak esur eth ewheels aresuit ablyposi-
tioned.
R Inthecase ofper fora tedbr ak ediscs, do
no tput themeasur ingpin onone ofthe
bor esinthebr ak edisc. Cleaning
andcare Cleaning
andcare NNo o
t t
es on w es
on washing t ashing
the v he
vehicle inacar w ehicle
inacar wash ash
&
W W
ARNIN G ARNIN
GRisk ofaccident dueto
re duced braking e.ect aTerwashing the
ve hicle
The braking e.ect isreduced aTerwashing
th eve hicle. #
ATer theve hicle hasbeen washed, brak e
car efull ywhile paying attent ion tothe
tr a1 cco nd itio ns untilth ebr aking e.ect
has been fullyre stor ed . 26
4 26
4 Ma
intena ncean dca re

R
Parking Assist PARK TRON ICisdea ctivated.
R V V
ehi cleswit ehi
cleswit hsur r h
sur round vie ound
viewca mer w
ca mer a: a:
The front
ima geisactiv ated aTer approx.eight seconds.
If one ofthese tting scanno tbe select ed,this is
displa yedby a% behindth ere specti veset-
tin g.
Ab ove aspeed of12 mph(2 0km /h)ca rwa sh
mode isaut omati callydeacti vated.
The follo wing settings arere se twhen carwash
mode isdeacti vated:
R The outside mirrors arefo lded out.
R The rain sensor isactiv ated.
R The rear wind owwiper isactiv ated.
R The aircondi tioningsystem isse tto fres hair
mo de.
R Parking Assist PARK TRON ICisrese tto the
pr ev iousl yselect edsetting.
R V V
ehicles wit ehicles
withsur r h
sur round vie ound
viewcamer w
camer a: a:
The front
imag eis deactiv ated atspeeds above11 mph
(18 km/h ). AA
ctiv ctiv
atin g/deactiv atin
g/deactiv atingaut atin
gaut omatic carw omatic
carwash mode ash
mode RR
eq eq
uir uir
emen ts: emen
ts:
R The vehicle isstation ary.
R The engine isrunning.
Multim ediasystem:
4 © 5
Set tings 5
Quick Access
A A
ctiv ctiv
ating aut ating
automa ticcarw oma
ticcarw as hmod e as
hmod e #
Selec tAut omat icCar Wash Mode. #
Selec tSt art.
If one ofthese tting scanno tbe select ed,this is
displa yedby a% behindth ere specti veset-
tin g.
% Foran overvie wof these tting smade when
activ ating automatic carwash mode
(/ page264).
Deacti v Deacti
vatin gaut atin
gaut omati ccar w omati
ccar wash mode ash
mode #
Select Stop.
The automati ccar wash setting sar ere se t. %
The automati ccar wash mode isaut omati cally
deacti vatedas soon asaspeed of12 mph
(20 km/h )is exceeded. NNo o
t t
es on using apo w es
on using apo wer w er
washer asher
&
W W
AR NIN G AR
NIN GRisk ofan acciden twhen using
po we rwa sher swit hro und-spr aynozzles
The waterje tcan cause extern all yin visi ble
damag e.
Com ponentsdamag edinthis wa yma yun ex-
pect edlyfa il. #
Donotuse apo we rwa sher withro und-
spr aynozzles . #
Have damag edtires orchassis parts
re placed immediat ely. To
avo iddamag eto your vehicle, observethefo l-
lo wing when usingapo we rwa sher :
R The Smar tKey isat aminimum distance of
10 T(3 m) awa yfrom theve hicle. Other wise,
th etrunk lidcould openunintentionall y. 266266
Maint
enance andcare