2023 MERCEDES-BENZ A CLASS sensor

*
N N
O O
TE TE
Bloc kedspr aynozzles cause dby
mixing windshield washer 0uids #
Donotmix MBSummerF itand MBWin-
te rF itwit hot her wind shield washer 0u-
ids. Do
notuse distilled orde-i onized water. Ot her -
wise, the/ll leve lsensor maybe trigg ered erro ne-
ous ly.
Re commen dedwindshi eldwasher 0uid:
R Above freez ing point :e.g. MBSum merFit
R Below freez ing point :e.g. MBWinterF it
Fo rth ecor rect mixin gra tio, referto theinf orma-
tion ontheantifr eeze container .
Mix washer 0uidwithwind shield washer 0uidall
ye ar round. RR
efr efr
ig ig
er er
ant ant
NNo o
t t
es on r es
on refr efr
ig ig
er er
ant ant
Obser vetheno teson oper ating0uids
(/ page328) . *
N NO O
TE TE
Damag edue toincor rect refrig er ant If
anon- appro vedre frig er ant isus ed ,th ecli-
mat econtr olsystem maybe damag ed. #
US US
A: A:
use onlyR‑134a refrig er ant . #
Canad a: Ca
nad a:useonl yR‑12 34yfre frig er ant . *
N NO O
TE TE
Dama getotheclimat econtr olsys-
te m due toincor rect refrig er ant comp res-
sor oil #
Onlyuse refrig er ant comp ressor oilthat
has been approvedby Mer cedes-Be nz. #
Donotmix theappr ovedre frig er ant
co mp ressor oilwithadi.er entrefrig er -
ant comp ressor oil. Wo
rkon theclimat econtr olsystem maybe car -
ri ed out onlyby aqu ali/ed special istwo rkshop.
All applic ableregula tions ,as wellas SAEstandar d
J639, mustbeadher edto.
The informa tion labelforth eclimat econtr olsys-
te m rega rding there frig er ant type and there frig-
er ant comp ressor oil(PAG oil) islocat edon the
inside ofthehood. Inf
ormation label(exa mp le–US A/China)
1 Hazar dand service warning symbo ls
2 Refrig er ant /llin gca pa city
3 Applicab lestand ards
4 PAGoil par tnumber
5 GWP(gl oba lwa rming potential )of there frig er -
ant used
6 Refrig er ant type 334334
Te
ch nica ldat a

DisplaDispla
ymessag y
messag es P es
Possible causes/conseq ossible
causes/conseq uencesand uences
and0050 0050
Soluti ons Soluti
ons
¸
00B0
ç
00C7
Tempora rilyUnavai lable
Sensors areDirty *F
ront and corner radar sensor s(her eaTer "sensor s")aremalfuncti oning.Po ssible causes:
R The senso rsaredir ty
R Hea vyrain or sno w
R Extended countrydr iving without other tra1c, e.g.in thedeser t
Dr iving systems anddriving safetysy stem sma ybe malf uncti oni ng ortemp orarily una vailable. Thebrak esy stem, steer -
ing and drive sy stem will continue tofunc tionnor mally. #
Drive on.
Once thecauses ofthepr oblem areno long erpresent, thedr iving systems anddriving safetysy stem swi llbe availabl e
ag ain and thecor respond ingsymbols willbeswitc hedo..
If th edispla ymessag edoes notdisappear : #
Stop theve hicle inaccor dance withth etra1c conditions. #
Clean allsensor covers from outside (/ page 155). #
Restar tth eve hicle. Displ
aymessag esand warning/in dicatorlam ps
369 369

DisplaDispla
ymessag y
messag es P es
Possible causes/conseq ossible
causes/conseq uencesand uences
and0050 0050
Soluti ons Soluti
ons
003D
Stop Vehicl eLeave Engine
Ru nning *T
he12 Vbatt erych arge leve lis toolow. #
Stop theve hicle immed iatelyin accor dance withth etra1c conditions. Donotcontinue driving. #
Leavetheve hicle running #
Ifth edispla ymessag edisappear s:drive on. #
Ifth edispla ymessag edoes notdisappear :consult aqua li/ed specialist workshop. TT
ir ir
e pr e
pr essur essur
emoni t e
moni tor or
Displ
a Displ
ay messag y
messag es P es
Possible causes/ conseq ossible
causes/ consequen ces and uen
ces and 0050 0050
Sol utions Sol
utions
Ti re Pre ss. Moni torCur-
rentl yUnav ailabl e *T
her eis int erfere nce from apo we rful radio signal sourceAs are sult ,no sign alsfrom thetir epr essur esensor sar e
being receiv ed.The tirepr essur emonit oring system istemp orarily una vailable.
The tirepr essur emonit oring system will restar tau tomaticall yas soon asthecause hasbeen recti/ed. #
Drive on.
Tir ePres s.Moni torInope ra-
tive *T
hetirepr essur emoni toring system isma lfunct ioning . &
W W
ARNI NG ARNI
NGTher eis arisk ofan acciden tif th etir epr essur emonit oring system ismalfunctionin g
The tirepr essur emonit oring system canno tissue awa rning ifth er eis pressur eloss inone ormor eof thetir es.
Ti re swit hinsu1cie nttirepr essur ema yim pair thedr iving charact eristics aswellas steer ing and braking. #
Have thetir epr essur emonit oring system checkedat aqu ali/ed special istwo rkshop. Displ
aymessag esand warning/in dicatorlam ps
379 379

DisplaDispla
ymessag y
messag es P es
Possible causes/conseq ossible
causes/conseq uencesand uences
and0050 0050
Soluti ons Soluti
ons
Tire Pressu reMonitor Inop-
erative NoWheel Sensors *T
hewheels installed donotha ve suit able tirepr essur esenso rs.The tirepr ess uremonit oring system isdeac tivated. #
Inst allwhe elswithsuit able tirepr ess uresens ors.
0077 Wheel Sensor(s) Missing *T
her eis no sign alfrom thetir epr essur esensor ofone ormor ewheels. Nopressur eva lue isdispla yedfo rth ea.ect ed
tir e. #
Have thefa ulty tirepr essur esensor replaced ataqu ali/ed special istwo rkshop.
0077 Ch eck Tires *T
hetirepr essur ein one ormor etir es has dropped signi/cantl y.
The wheel positionis dis pla yed. Awa rning tone willals osou nd. &
W W
ARNI NG ARNI
NGRisk ofan accid ent due toinsu1c ienttirepr essur e
R The tires can burst.
R The tires can wearexcessiv elyand/ orune venly.
R The driving charact eristics aswellas thesteer ing and braking maybe greatl yim pair ed.
Yo ucould then lose contr olof theve hicle. #
Obser vethere commen dedtirepr essur es. #
Adjust thetir epr essur eif necessar y. #
Stop theve hicle inaccor dance withth etra1c conditions. #
Chec kth etir epr essur e(/ page293) andthetir es. 380380
Displa
ymessag esand warning/in dicatorlam ps

DisplaDispla
ymessag y
messag es P es
Possible causes/conseq ossible
causes/conseq uencesand uences
and0050 0050
Soluti ons Soluti
ons #
Switc ho. theve hicle. #
Add1.1 USqt(1l)of engin eoil (/ page261). #
Chec kth eengine oilleve l.
No teson eng ineoil(/ page331).
00B3
Engine OilPre ssu reStop
Swi tch OffEngine *T
heoilpressur eis toolow.
* N N
O O
TE TE
Engine damageca use dby driving withinsu1cien toil pressur e #
Avoid drivin gwit hinsu1cient oilpressur e. #
Stop theve hicle immed iatelyin accor dance withth etra1c conditions. Donotcontinue driving. #
Switc ho. theve hicle. #
Con sult aquali/ed specialistwo rkshop.
00B3
Engine OilLeve lCa nnot Be
Mea sured *T
heelect rical conn ectionto theoil leve lsensor hasbeen interrupted ortheoil leve lsensor isfaulty . #
Consult aqu ali/ ed spec ial ist wo rkshop. Displ
aymessag esand warning/in dicatorlam ps
385 385

WW
ar ar
nin g/ind icat nin
g/ind icat orlam pP or
lam pP ossiblecauses/conseq ossible
causes/conseq uencesand uences
and0050 0050
Solut ions Solut
ions #
Pull overand stop theve hicle safelyas soon aspossibl e,paying attent ion toroad and tra1c cond itions. Donot
cont inuedr ivi ng und eranycir cums tances . #
Cons ultaqu ali/ ed spec ial ist wo rkshop. #
Notethemessag eson theinstr ument display. Engi
ne Engi
ne WW
ar ar
nin g/i ndicat nin
g/i ndicat orlam pP or
lam pP ossiblecauses/conseq ossible
causes/conseq uencesand uences
and0050 0050
Solut ions Solut
ions
ÿ
Coolant warning lamp(red) *T
he redcoolant warning lampis lit while theengine isrunning.
Po ssible causes:
R The temp eratur esensor ismalfunctionin g
R The coolant leve lis toolow
R The airsuppl yto thera diat orisobstr ucted
R The radiat orfan is faulty
R The engine coolant pumpis faulty
If th er eis an additional warning tone, thecoolant temp eratur ehas exceeded themaximum permissible temp eratur e. Displa
ymessag esand warning/in dicatorlam ps
389 389

WW
ar ar
nin g/ind icat nin
g/ind icat orlam pP or
lam pP ossiblecauses/conseq ossible
causes/conseq uencesand uences
and0050 0050
Solut ions Solut
ions
ÿ
Coolant warning lamp(yel-
lo w) *T
he yello wcoolant warning lampis lit while theengine isrunning.
Po ssible causes:
R The temp eratur esensor ismalfunctionin g
R The charge air,tr ansmi ssionoilorbatt erycooli ngisfaulty
R The radiat orshutt ersar ebloc kedor def ectiv e #
Avoiding highloads ontheengine, drive to thenear estquali/ed special istwo rkshop.
00B9 Eng inediag nosiswa rning
lam p *T
he yello wChec kEngine warning lampis lit while theengine isrunning.
A ma lfunct ionhasocc urredin theengine, theex haus tsy stem orthefuel system.
The emission limitvalues maybe exceeded andtheengine maybe inemer gency mod e.
In som estat es, legalrequ irements stipulateth at youmust immediat elyconsult aqu ali/ed special istwo rkshop assoon
as theye llo wChec kEngine warning lamplights up. #
Have theve hicle checkedas soon aspossible ataqu ali/ed special istwo rkshop.
003D
Elect rical malfu nctionwarn-
ing lamp *T
heredelectr icalmalfuncti onwarning lampis lit.
Ther eis amalfunction intheelectr ics. #
Notethemessag eson theinstr ument display. Displa
ymessag esand warning/in dicatorlam ps
391 391

DrDr
iving syst iving
systems ems
WW
ar ar
ning /indicat ning
/indicat orlam pP or
lam pP ossiblecauses/conseq ossible
causes/conseq uencesand uences
and0050 0050
Solut ions Solut
ions
L
Wa rning lampfo rdist ance
wa rning function *T
he reddist ance warning lamplights upwhile theve hicle isin mo tion .
The distance totheve hicle infront istoosmall forth espeed selected.
If th er eis an additional warning tone, youar eappr oaching anobst acle attoohigh aspeed. #
Beprepar edtobrak eimmediat ely. #
Incr ease thedist ance.
Fu nctio nof ActiveBr ak eAssi st(/ page175).
Ó Ac tiveBr ak eAssi stwa rning
lam p *T
heActiveBr ak eAssi stwa rning lampis on.
Due todir tysensor sor amalfuncti on,thesy stem isno tav ailabl eor thera ng eof functi onsisrestr icte d. #
Notethemessag eson theinstr ument display.
ê
Ac tiveBr ak eAssi stwa rning
lam p *T
heActiveBr ak eAssi stwa rning lampis on.
The system isswitc hedo.orthera ng eof functi onshasbee naut oma tically re str icte d.
This maybe thecase ifth edr iver isno twe aring aseat beltorano ther driving system has been activated. #
Obser vetheno teson ActiveBr ak eAssi st(/ page175) . 396396
Disp
lay mes sagesand warning/in dicatorlam ps