2019 AUDI A4 radiator

8W0012721BG
Driving

Emergencyofffunction*
Ifitisabsolutelynecessary,theenginecanalso
beturnedoffwhiledrivingatspeedsstartingat
4mph(7km/h).Tostoptheengine,pressthe
STARTENGINESTOP]buttontwiceinarowor
pressandholditonetime.



ZA\WARNING
—Neverturnofftheenginebeforethevehicle
hascometoacompletestop.Switchingit
offbefore thevehiclehasstoppedmayim-
pairthefunctionofthebrakeboosterand
powersteering.Youwouldthenneedtouse
moreforceto steerandbrakethevehicle.
Thefactthatyoucannotsteerandbrakeas
usualmayincreasetheriskofaccidentsand
seriousinjuries.
—Ifyouleavethevehicle,switchtheignition
offandtakethevehiclekeywithyou.Ifyou
donotdothis,theenginecouldbestarted
andelectricalequipmentsuchasthepower
windowscouldbeactivated.Thiscanleadto
seriousinjuries.
—Forsafetyreasons,alwaysparkthevehicle
withtheselectorleverinthe"P"position
(automatictransmission)orwith1stgear
engaged(manualtransmission).Otherwise
thevehiclecouldrollawayunintentionally.

@)Note
Iftheenginehasbeenunderheavyloadfor
anextendedperiodoftime,heatbuildsupin
theenginecompartmentaftertheengineis
switchedoffandthereisariskofdamaging
theengine.Forthis reason,lettheenginerun
atidleforapproximatelytwominutesbefore
shuttingitoff.
G)Tips
Forupto10minutesafterstoppingtheen-
gine,theradiatorfanmayturnonagainauto-
maticallyoritmaycontinuetorun,evenifthe
ignitionisswitchedoff.
BRemotecontrolkey:key notdetected.Isthe
keystillinthevehicle?
Thisindicatorlightturnsonandthismessageap-
pearsifthevehiclekeyisremovedfromthevehi-
clewhentheengineisrunning.Ifthevehiclekey
isnolongerinthevehicle,youcannotswitchthe
ignitiononorstarttheengineonceyoustopit.
Youalsocannotlockthevehiclefromtheoutside.
BRemotecontrolkeyandsmartphonenotde-
tected.Areyourkeyandsmartphonestillinthe
vehicle?
Thisindicatorlightturnsonandthismessageap-
pearsifthevehiclekeyandsmartphonearere-
movedfromthevehiclewhiletheengineisrun-
ning.Ifthevehiclekeyandsmartphoneareno
longerinthevehicle,youcannotswitchtheigni-
tiononorrestarttheengineonceyoustopthe
engine.Youalsocannotlockthevehiclefromthe
outside.
Remotecontrolkey:holdbackofkey
against
thedesignatedarea.Seeowner'sman-
ual
Iftheindicatorlightturnsonandthismessage
appears,thereisamalfunction>page79.
Hold backofkeyonthedesignatedarea,or
placeyoursmartphoneinthechargingcradle
Iftheindicatorlightturnsonandthismessage
appears,thereisamalfunction>page79.
Startingtheenginewhenthereisa
TEUiisio)

Fig.88Centerconsole/vehiclekey:startingtheengineif
thereisamalfunction
79
>

Driving

Startingonhillswithhillholdassist
Hillholdassistmakesiteasiertostartonhills.
Requirement:
thedriver'sdoormustbeclosed
andtheenginemustberunning.
>Toactivatehillholdassist,pressandholdthe
brakepedalforseveralseconds.Thevehicle
mustbefacinguphill.
Afterreleasingthebrakepedal,thebrakingpow-
erismaintainedbriefly>A\topreventthevehi-
clefromrollingbackwhenstarting.Thisallows
youtobegindrivingmoreeasily.

ZAWARNING
—Ifyoudonotbegindrivingimmediatelyor
theenginestallsafterreleasingthebrake
pedal,yourvehiclemaybegintorollback-
ward.Pressthebrakepedalorsetthepark-
ingbrakeimmediately.
—Theintelligenttechnologyofhillholdassist
cannotovercomethelimitationsimposedby
naturalphysicallaws.Theincreasedcomfort
offeredbyhillholdassistshould notcause
youtotakesafetyrisks.
—Hillholdassistcannotholdthevehiclein
placeonallhills(forexample,iftheground
isslipperyoricy).
—Toreducetheriskofanaccident,always
makesurethevehicleissituatedsafely

whilestationary.

Drivingoffroad
Generalinformation
Appliesto:allroad
TheElectronicStabilizationControl(ESC)func-
tionsareenhancedfordrivingoffroad.Offroad
modecanbeactivated whendrivinginsituations
where
slippageoradifferentiallockfunctionis
necessary>page139.Thehilldescentassistis
alsoavailable,whichautomaticallybrakestheve-
hicletomaintainaconstantspeed>page140.
Inaddition,yourAudiprovidescontinuousall
wheeldrive.
However,yourAudiisnotanoffroadvehicle.
Onlydriveinterrainthatissuitableforthevehi-
84
cleandyourdrivingability.Nevertakeanyun-
necessaryrisks!
Afterdrivingoffroad
—Afterdrivingoffroad,removebranchesandoth-
erdebrisfromtheradiatorgrille,underbody,
andwheels.Lookespeciallyforforeignobjects
(such asstones)thatmaybestuckinthetire
tread.
—Cleanthevehiclebody andunderbodyandin-
spectthevehicleforpossibledamage.
—Cleanthewindows,headlights,taillightsand
thelicenseplateiftheyaredirty.
—Performabraketest(especiallyafterdriving
throughwater).

Z\WARNING
—Beespeciallyaware andattentivewhendriv-
ingunderdifficultconditions.Vehicledam-
ageandinjuriesmayoccurwhendrivingat
excessivelyhighspeedsorwithincorrect
drivingmaneuvers.
—Alwaysadjustyourspeedanddrivingstyle
totheroads,terrain,trafficand weather
conditions.Driveespeciallyslowlyifthereis
lowvisibilitywhenoffroad.
—Pleasenotethatthewheelscanspinmore
andthevehiclecanswervewheninoffroad
mode,especiallywhentheroadisslippery
orhasloosesurfacematerial.
—Drivingstabilityisreducedwheninoffroad
mode.

@)Forthesakeoftheenvironment
Avoidharmingtheenvironmentandshow
considerationfornature.
G)Tips
Onlydrivewhereitispermittedandalways
stayontheprovidedroadsandpaths.

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Parkingaid

Parkingaid
Generalinformation
Appliesto:vehicleswitharearparkingsystem/parkingsys-
templus/rearviewcamera/peripheralcameras
Dependingonyourvehicle'sequipment,various
parkingaidswillhelpyouwhenparkingandma-
neuvering.
Therearparkingsystemisanaudible parkingaid
thatwarnsyouofobstaclesbehindthevehicle
=>page130.
Theparkingsystemplusassistsyouwhilepark-
ingbyaudiblyandvisuallywarningyouofobjects
detectedinfrontofandbehindthevehicle
=>page130.
Therearviewcamerashowstheareabehindthe
vehicleintheInfotainmentsystemdisplay.The
linesintherearviewcameraimagehelpyouto
parkormaneuver>page132.
Theperipheralcamerasgivevariousviewsto
helpyouwhenparkingormaneuvering
=page133.Theparkingsystemplusfunctions
arealsoavailable>page130.

ZAWARNING
—Alwayslookfortrafficandcheckthearea
aroundyourvehiclebylookingatitdirectly
aswell.Theparkingsystemcannotreplace
thedriver'sattention.Thedriverisalways
responsiblewhenenteringorexitingapark-
ingspaceandduringsimilarmaneuvers.
—Pleasenotethatsomesurfaces,suchas
clothing,arenotdetectedbythesystem.
—Sensorsandcamerashaveblindspotsin
whichpeopleandobjectscannotbedetect-
ed.Beespeciallycautiousofsmallchildren
andanimals.
—Alwayskeepyoureyesonthevehicle'ssur-
roundings,usingtherearviewmirroraswell.
— Thesensorscanbedisplacedbyimpactsor
damagetotheradiatorgrille,bumper,
wheelhousingandtheunderbody.Thepark-
ingsystemmaybeimpairedasaresult.
HaveanauthorizedAudidealerorauthor-
izedAudiServiceFacilitychecktheirfunc-
tion.

C@)Note
—Someobjectsarenotdetectedordisplayed
bythesystemundercertaincircumstances:
—objectssuchasbarrierchains,trailerdraw
bars,verticalpolesorfences
—objectsabovethesensorssuchaswallex-
tensions
—objectswithcertainsurfacesorstructures
suchaschainlinkfencesorpowdersnow
—Ifyoucontinuedrivingclosertoalowob-
ject,itmaydisappearfromthe sensor
range.NotethatyouwillnoLongerbe
warnedaboutthisobstacle.
—Maintainenoughdistancefromthecurbto
reducetheriskofdamagetotherims.
@)Tips
—The systemmayprovideawarningeven
thoughtherearenoobstaclesinthecover-
ageareainsomesituations,suchas:
—certainroadsurfacesor whenthereistall
grass
—externalultrasonicsourcessuchasfrom
cleaningvehicles
—inheavyrain,snow,orthickvehicleex-
haust
—Werecommendthatyoupracticeparkingin
atraffic-freelocationorparkinglotto be-
come
familiarwiththesystem.Practice
parkingingoodlightand weathercondi-
tions.
—Youcanchangethevolumeofthesignals
andthedisplay>page136.
—Whatappearsintheinfotainmentdisplayis
somewhattime-delayed.
—Thesensorsmustbekeptcleanandfreeof
snowandicefortheparkingaidtooperate.
—Appliesto:vehicleswithrearwindowwiper:
Therearviewcamerawillbecleanedwith
therearwindow>page53.
129

8W0012721BG
CheckingandFilling

OnBoardDiagnosticSystem
EnginedatacanbereadoutattheOnBoardDi-
agnosticSystemconnectionportusingaspecial
testingdevice>fig.253.
Indicatorlight
IftheSindicatorlightblinksorturnson,there
isamalfunctionthatiscausingpooremissions
qualityandthatcoulddamagethecatalyticcon-
verter.DriveslowlytoanauthorizedAudidealer
orauthorizedAudiServiceFacilitytohave the
malfunction
corrected.
Theindicatorlightcanalsoturnonifthefuelfill-
ercapisnotclosedcorrectly>page306).

Z\WARNING
Incorrectuseofthe connectionportforthe
OnBoardDiagnosticSystemcancausemal-
functions,whichcanthenresultinaccidents
andseriousinjuries.
—OnlyallowanauthorizedAudidealerorau-
thorizedAudiServiceFacilitytoreadout the
enginedata.

Enginecompartment
MelatimimsaCeMtalemeen)Seen1n
Specialcareisrequiredifyouareworkinginthe
enginecompartment
Forworkintheenginecompartment,suchas
checkingandfillingfluids,thereisariskofin-
jury,scalding,accidents,andburns.Forthis
reason,followallthewarningsandgeneral
safetyprecautionsprovidedinthe followingin-
formation.Theenginecompartmentisadan-
gerousarea.>/\.

Z\WARNING
—Turntheengineoff.
—Switchtheignitionoff.
—Settheparkingbrake.
—Onvehicleswithamanualtransmission,
movethegearshiftlevertoneutral,andon


)Dependingontheengine


vehicleswithanautomatictransmission,se-
lectthe“P”(Park)position.
—Allowtheenginetocool.
—Keepchildrenawayfromtheenginecom-
partment.
—Neverspillfluidsonahotengine.Theseflu-
ids(suchastheanti-freezingagentcon-
tainedinthecoolant)canignite.
—Avoidshortcircuitsintheelectricalsystem.
—Neverreachintotheradiatorfan.Thefanis
temperature-controlledandcanturnon
suddenly,evenwhentheignitionisswitched
off.
—Neveropenthehoodwhenthereissteamor
coolantescapingfromtheenginecompart-
ment,becausethereisariskthatyoucould
beburned.Waituntilnosteamorcoolantis
escaping.
—Neveropenthecaponthecoolantexpan-
siontankwhentheengineiswarm.The
coolingsystemisunderpressure.
—Toprotectyourface,hands,andarmsfrom
hotsteamorcoolant,coverthecapwitha
thick clothwhenopening.
—Donotremovetheenginecoverunderany
circumstances.Thisincreasestheriskof
burns.
—Duetotheriskofelectricshock,nevertouch
theignitioncableorothercomponentsin
theelectronichigh-voltageignitionsystem
whentheengineisrunningorisstarting.
—Ifagearisengagedwhilethevehicleissta-
tionaryandtheengineisrunning,donot
presstheacceleratorpedalinadvertently.
Pressingtheacceleratorpedalwillcausethe
vehicletomove,andthiscouldresultinan
accident.
—Ifinspectionsorrepairsmustbeperformed
whiletheengineisrunning,movingcompo-
nents(suchastheribbedbelt,generator,
and
radiatorfan)poseanadditionalrisk.
—Firstsettheparkingbrake,andthenmove
thegearshiftlevertoneutralonvehicles
withamanualtransmissionorselectthe

309

CheckingandFilling

engine.Ifthishappens,onlyusewaterand
restorethecorrectmixtureratiowiththe
specifiedcoolantadditiveassoonaspossi-
ble.
—Onlyrefillwithnewcoolant.
—Radiatorsealantmustnot bemixedwith
thecoolant.
Addingcoolant

©=FeRAZ-0540


MIN

Fig.258Enginecompartment-coolantexpansiontank
(diagram):@coverwithreleasebutton;2)markings
Observethesafetyprecautions>page309,
Workingintheenginecompartment.
Checkingtheenginecoolantlevel
>Parkthevehicleonalevelsurface.
>Switchtheignitionoff.
>Readthecoolantlevelonthecoolantexpansion
tank>page311,fig.256.Thecoolantlevel
mustbebetweenthemarkings@)>fig.258
whentheengineiscold.Whentheengineis
warmitcanbeslightlyabovetheupper mark-
ing.
Addingcoolant
>Allowtheenginetocool.
> Placealarge,thicktowelonthecoolantexpan-
siontankcover.
>Pushthereleasebutton(@)9fig.258onthe
capandcarefullyturnittotheleftuntilyou
feelresistance>/\.
>Pushthereleasebuttonagainandremovethe
capcompletely.
>Makesurethatthefluidlevelremainsstable.
Add morecoolantifnecessary.
>
Turn thecaptotherighttotightenituntilyou
feelresistanceasecondtime.
316
Coolantlossusuallyindicatesthatthereisaleak.
Immediatelydriveyourvehicletoanauthorized
AudidealerorauthorizedAudiServiceFacility
andhavethecoolingsysteminspected.Ifthe
coolingsystemisnotleaking,coolantlosscanre-
sultfromthecoolantboilingdueoverheating
andthenbeingforcedoutofthecoolingsystem.

ZA\WARNING
— Theenginecompartmentinanyvehiclecan
beadangerousarea.Stoptheengineandal-
lowitto coolbeforeworkingintheengine
compartment.Alwaysfollowtheinforma-
tionfoundin>page309,Workinginthe
enginecompartment.
—Neveropenthehoodifyoucan seeorhear
steamorcoolantescapingfromtheengine
compartment.Thisincreasestheriskof
burns.Thecoolingsystemisunderpressure.
Whenyounolongerseeorhearsteamor
coolantescaping,youmayopentheengine
compartmentwithcaution.
—Whenworkingintheenginecompartment,
rememberthattheradiatorfancanswitch
oneveniftheignitionisswitchedoff,which
increasestheriskofinjury.
—Coolantadditiveandcoolantcan bedanger-
oustoyourhealth.Forthisreason, storethe
coolantintheoriginalcontainerandaway
fromchildren.Thereisariskofpoisoning.

@)Note
Donotaddcoolantiftheexpansiontankis
empty.Theremaybe airinthecoolingsys-
tem,whichincreasestheriskofenginedam-
age.Ifthisisthecase,donotcontinuedriv-
ing.SeeanauthorizedAudidealerorauthor-
izedAudiServiceFacilityforassistance.

CheckingandFilling

>Attheendofthechargingprocess,switchthe
chargeroffandpullthepowercableoutofthe
socket.
>Removethechargingdeviceterminalclamps.
>Closetheredcoveronthepositiveterminal.
>Closethehood>page310.

ZXWARNING
—Neverconnectthechargingcabledirectlyto
yourvehiclebattery.Onlyuse the connec-
tionsintheenginecompartment
=>page319.
—Ahighlyexplosivemixtureofgasescanform
whenchargingbatteries.Onlychargethe
batteryinwell-ventilatedareas.
—Adrainedbatterycanfreezeattempera-
turesaround329F(02C).Donotchargeor
useafrozenorthawedbattery.If iceforms,
thebatteryhousingcancrackandbattery
electrolytecanleakout,whichincreasesthe
riskofanexplosionandchemicalburns.
Contact anauthorizedAudidealerorauthor-
izedAudiServiceFacilityformoreinforma-
tion.
—Donotconnectordisconnectthecharging
cablewhilechargingbecausethisincreases
theriskofanexplosion.

@)Tips
Readallofthemanufacturer'sinstructions
forthechargerbeforechargingthebattery.
Windshieldwasher
system

B8W-0125



Fig.261Enginecompartment:washerfluidreservoircap
ThewindshieldwasherfluidreservoirScontains
thecleaningsolutionforthewindshieldandthe
320
headlightwashersystem*>page311,fig.256.
Thereservoircapacitycanbefoundin
=>page373.
Toreducetheriskoflimescaledepositsonthe
spraynozzles,usecleanwaterwithlowamounts
ofcalcium.Alwaysaddwindowcleanertothewa-
ter.Whentheoutsidetemperaturesarecold,an
anti-freezingagentshould beaddedtothewater
sothatitdoesnotfreeze.
C)Note
— Theconcentrationofanti-freezingagent
mustbeadjustedtothevehicleoperating
conditionsandtheclimate.Aconcentration
thatistoohighcanleadtovehicledamage.
—Neveraddradiatoranti-freezeorotheraddi-
tivestothewasherfluid.
—Donotuseaglasscleanerthat contains
paintsolvents,becausethiscoulddamage
thepaint.
Serviceintervaldisplay
Theserviceintervaldisplaydetectswhenyourve-
hicleisdueforservice.
Checkingserviceintervals
Youcan checktheremainingdistanceortimeun-
tilthenextoilchangeornextinspectioninthe
Infotainmentsystem.

>SelectintheInfotainmentsystem:the[MENU
button>Vehicle>leftcontrolbutton>Service
&checks>Serviceintervals.

Resettingtheindicator
AnauthorizedAudidealerorauthorizedAudi
ServiceFacilitywillresettheserviceintervaldis-
playafterperformingservice.
Ifyouhavechangedtheoilyourself,youmustre-
settheoilchangeinterval.

>SelectintheInfotainmentsystem:the|MENU
button>Vehicle>leftcontrolbutton>Service
&checks>Serviceintervals>Resetoilchange
interval.

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Fusesandbulbs






















































Fusepanel(4)(brown)Fusepanel©(black)
No.|EquipmentNo.|Equipment
2Massairflowsensor,camshaftadjustment,1|Frontseatheating
chargeaircoolerpump2|Windshieldwipers
3Exhaustdoors,fuelinjectors,radiatorin-3|Leftheadlightelectronics
EseyeletheheATOeSSHTigIHCOECEPanoramicglassroof/sliding/tiltingsun-
Vacuumpump,hotwaterpump,particu-4roof
4|latesensor,biodieselsensor,exhaust©|Letetrontdoorcontrolmodule
doors
-6|Sockets
5|Brakelightsensor
: :7|Rightreardoorcontrolmodule
6|Engine valves,camshaftadjustment
-8|Allwheeldrive
7|Heatedoxygensensor,massairflowsensor-- -
- -
9|Rightheadlightelectronics
8Waterpump,highpressurepump,high: : -
pressureregulatorvalve10Windshieldwashersystem/headlight
washersystem
9|Hotwaterpump
--11|Leftreardoorcontrolmodule
10|Oilpressuresensor,oiltemperaturesensor
11|Clutchpedalpositionsensor,enginestartFusepanel(©)(black)
12
|
EnginevalvesNo.
|
Equipment
13|RadiatorfanSeatventilation,rearviewmirror,climate
14|Fuelinjectors,enginecontrolmodule1|controlsystem,rearclimatecontrolsys-
_-temcontrols,windshielddefogger
15|Ignitioncoils,heatedoxygensensors
2|Gateway,climatecontrolsystem
16|Fuelpump
3|Soundactuator/exhaustsoundtuning
Fusepanel(8)(red)4|Clutchpedalpositionsensor
No.|Equipment5|Enginestart
Anti-theftalarmsystem7|RearUSBchargingport
2|Enginecontrolmodule8|Garagedooropener
Lumbarsupport9|Adaptivecruisecontrol
4Automatictransmissionselectormecha-10|Exteriorsound
Hen11|Videocamera
5|Horn5:==
12|MatrixLEDheadlight/rightLEDheadlight
6|Electromechanicaliparkingbrake13|MatrixLEDheadlight/leftLEDheadlight
7|Gatewaycontrolmodule14|Rearwindowwiper
8|Interiorheadlinerlights16|Rear SeatEntertainmentpreparation
9|Emergencycallsystem—
10|AirbagcontrolmoduleFusepanel©)(red)
11|ElectronicStabilizationControl(ESC)No.:|Equipment
12|Diagnosticconnector,light/rainsensor1|Ignitioncoils
13|Climatecontrolsystem5_|Enginemount
14|Rightfrontdoorcontrolmodule6[Automatictransmission
15|A/Ccompressor7|Instrumentpanel
8|Climatecontrolsystem(blower)

359