2019 AUDI A4 check engine

Trailertowing

Outsidemirrors
Ifyoucannotseethetrafficbehindthetrailer
withthestandardexterior mirrors,thenyou
mustattachadditionalexterior mirrors.Adjust
themsoyouhaveasufficientvisibilitybehind
you.
Exterior lighting
Followthelegalregulationsregardingthelight-
ingequipmentonyourtrailer.Contactanauthor-
izedAudidealerorauthorizedAudiServiceFacili-
tyformoreinformation.
Beforeyoustartdriving,checkalllightingequip-
mentonthetrailerwhileitishitchedtothevehi-
cle.
Theheadlightrangecontrolautomaticallyad-
juststhelightrangeoftheheadlights.
Safetychains
Makesurethesafetychainsarecorrectlyapplied
whenpullingatrailer.Thechainsshouldhang
enoughsothatthetrailercandrivearound
curves.However,theymustnottouchthe
ground.
©)Note
Attachmentsretrofittedonthevehiclemay
causedamage,especiallyonthetrailerhitch
ballhead.Incasesofdamage,havethefunc-
tioncheckedby anauthorizedAudidealeror
authorizedAudiServiceFacility.
G)Tips
—Blockthewheelswithchockswhenparking
oninclinesifthetrailerisloaded.
—Havingthevehicleinspectedbetweenthe
inspectionintervalsisrecommendedifyou
towatrailerfrequently.
—Avoiddrivingwithatrailerduringthevehi-
clebreak-inperiod.
94
Drivingwithatrailer
Drivingwithatrailerrequiresextracaution.
Speed
Adheretothelegalspeedlimits.Followthelegal
regulationsspecifictothecountry.
Asthespeedincreases,thedrivingstabilityof
thetrailerdecreases.Thereforeyoushould not
exceedthemaximumlegalspeedlimitwhen
thereareunfavorableroad,weather,and/orwind
conditions.Thisespeciallyapplieswhendriving
downhill.
Hill
Whenyoustartdrivinguphillordownhill,trailers
maytiltorswaysoonerthanwhendrivingona
levelsurface.Ifsmallswayingmovementshave
alreadyoccurred,youcanstabilizethetrailerby
firmlybrakingimmediately.Nevertryto
“straightenout”thetrailerbyaccelerating.
Downshiftbeforedrivingonhillstoutilizetheen-
ginebrakingeffect>A\.
Brakes
Whenusingatrailerwithoverrunbrakes,first
brake
gentlythenquickly.Thisreducestheriskof
jerkingwhilebrakingifthetrailerwheelslockup.
Enginecoolanttemperature
Payattentionspecificallytothecoolanttempera-
turedisplaywhentherearehighoutsidetemper-
atures,andwhendrivingonlonginclines
=page14.Shifttoahighergearinatimelyman-
ner.

ZA\WARNING
Constantbrakingcausesthebrakestoover-
heatandcansubstantiallyreducebrakingper-
formance,increasebrakingdistance,orcause
completefailureofthebrakesystem.

Assistsystems

@Tips
—Youcancanceltheautomaticbrakeactiva-
tionwithincreasingbrakingforceifyouap-
plythe brakesyourselforaccelerateconsid-
erably.
—Insomesituations,rearcross-trafficassist
maywarnyouevenifthereisnocrosstraffic
ina criticalarea,forexamplewhenbacking
into aparkingspaceormaneuvering.
—Therearcross-trafficassistalsoswitchesoff
whenyouswitchofftheESC.
—Foranexplanationonconformitywiththe
FCCregulationsinthe UnitedStatesandthe
IndustryCanadaregulations,see
=>page370.
Appliesto:vehicleswithAudisideassist
Amessageappearsintheinstrumentclusterdis-
playifthesideassistswitchesoffautomatically.
8Audisideassist:malfunction!Pleasecontact
Service
8Audisideassistandexitwarning:malfunc-
tion!PleasecontactService
Thesystemcannotguaranteethatitwilldetect
vehiclescorrectlyandithasswitchedoff.The
sensorshavebeenmovedorarefaulty.Havethe
systemcheckedbyanauthorizedAudidealeror
authorizedAudiServiceFacilitysoon.
Audisideassist:currentlyunavailable.Sen-
sorvisionrestrictedduetosurroundings.See
owner'smanual
Audisideassistandexitwarning:currently
unavailable.Sensorvisionrestrictedduetosur-
roundings
Theradarsensorvisionisimpaired.Theareain
frontofthesensorsmustnot becoveredbybike
racks,stickers,leaves,snoworanyotherobjects.
Cleantheareacoveringthesensors,ifnecessary
=>page122,fig.122.
Audisideassist:currentlyunavailable.See
owner'smanual
126
Audisideassistandexitwarning:currently
unavailable.Seeowner'smanual
Sideassistcannotbe switchedonatthistimebe-
causethereisamalfunction(forexample,the
batterychargelevelmaybetoolow).
Rearparkingaid:obstacledetectionrestrict-
ed
Therearcross-trafficassistisnotavailable.Ei-
thertheESCisswitchedoff,ortheradarsensors
maybecoveredbyabikerack,stickers,leaves,
snoworotherobjects.SwitchtheESCon,or
cleantheareainfrontofthesensorsifnecessary
=>page122,fig.122.Ifthismessagecontinues
tobedisplayed,driveimmediatelytoanauthor-
izedAudidealerorauthorizedAudiServiceFacili-
tytohave themalfunctionrepaired.
Audidriveselect
Introduction
Appliesto:vehicleswithAudidriveselect
Driveselectmakesitpossibletoexperiencedif-
ferenttypesofvehiclecharacteristicsinonevehi-
cle.ThedrivercanselectOffroad*,Comfort,Au-
toandDynamicmodesintheInfotainmentsys-
temtoswitchbetweenasportyandacomforta-
bledrivingmode,forexample.IntheIndividual
mode,thesettingscan beadjustedtoyourper-
sonalpreferences.Thismakesitpossibletocom-
bine settingssuchasasportyenginesettingwith
lightsteering.
Appliesto:vehicleswithAudidriveselect
Thefollowingsystems,amongotherthings,are
influencedbydriveselect:
Engineandautomatictransmission*
Dependingonthemode,theengineandauto-
matictransmission*respondmorequicklyorina
morebalancedmannertoacceleratorpedal
movements.InthesportyDynamicmode,the
transmissionshiftsathigherspeedranges.

8W0012721BG
Telephone

Telephone
Introduction
Appliesto:vehicleswithtelephone
Tomakephonecallsinyourvehicleusingthe
MMI,connectyourcellphonetotheMMIvia
Bluetooth.
Handsfree
Afteryouhaveconnectedyourmobiledevice to
theMMIviaBluetooth,youcan use thehandsfree
systemandoperatetelephonefunctionsthrough
yourMMI.Youcanmakecallsusingtheantenna
onyourmobiledevice.
Withthe Audiphonebox’,callsaremadeusing
theexteriorantennaonthevehicle.Usingtheex-
ternalantennahelpswhenthereisalowsignal
andalsoprovidesbetterreceptionquality
=>page174.

ZAWARNING
—Medicalexpertswarnthatmobiledevices
caninterferewiththefunctionofpacemak-
ers.Alwaysmaintainaminimumdistanceof
about8inches(20cm)betweenthecell
phoneantennaandthepacemaker.
—Donotcarrythemobiledeviceinapocket
directlyoverthepacemakerwhenthe
phoneisswitchedon.
—Switchthemobiledeviceoffimmediately
ifyoususpectitmaybeinterferingwith
thepacemaker.
—Donotuse thevoicerecognitionsystem*
=>page164inemergenciesbecauseyour
voicemaychangeinstressfulsituations.The
systemmaytakelongertodialthenumber
ormaynotbeabletodialitatall.Dialthe
emergencynumbermanually.
—Switchyourmobiledeviceoffinareaswhere
thereisariskofanexplosion.Theseloca-
tionsarenotalwaysclearlymarked.This
mayincludegasstations,fuelandchemical
storagefacilitiesortransportvehicles,orlo-
cationswherefuelvapors(such aspropane
orgasolinevaporinvehiclesorbuildings),
chemicalsorlargequantitiesofdustparti-
cles(suchasflour,sawdustormetal)may


bepresentintheair.Thisalsoapplies toall
otherlocationswhereyouwouldnormally
turnyourvehicleengineoff.
— Thedemandsoftrafficrequireyourfullat-
tention.Alwaysreadthechapter
=>page145,Trafficsafetyinformation.
@)Note
Alwaysfollowtheinformationfoundin>@in
Wi-Fisettingsonpage193.
@)Tips
—TheBluetoothconnectionrangeislimited
toinsidethevehicle.Itcanalsobeaffected
bylocalconditionsandinterferencewith
otherdevices.

—TolearnwhichBluetoothconnectionsand
whichofthefunctionsinyourmobiledevice
aresupported,checkwithyourmobilede-
viceserviceproviderorthedatabaseformo-
biledevicesatwww.audiusa.com/
bluetooth.
Setup
ConnectingacellphoneusingBluetooth
Appliesto:vehicleswithtelephone
Naonro)ated
DoesthisPINmatchtheoneon your
Bluetoothdevice?PIN:967536

Fig.171DisplayingthePINforenteringinthecellphone
Requirement
Thevehiclemustbestationaryandtheignition
mustbe switchedon.
TheBluetoothsettingsmustbeopenonyour
mobiledeviceduringtheconnectionsetup.
TheBluetoothfunctionandvisibilityoftheMMI
=page243andmobiledevicemustbe switched
on.
171

Media

deviceisrecognizedasaUSBstoragedevice
(forexampleaUSBstick).Appledevicesand
MTPdevices(suchassmartphones)arenot
recognizedasUSBstoragedevices.
—iPodoriPhonemalfunctionsalsoaffectthe
operationoftheMMI.ResetyouriPod or
iPhoneifthishappens.
—AudirecommendsupdatingtheiPodor
iPhonesoftwaretothelatestversion.For
importantinformationonoperatingyour
iPod oriPhone,refertotheuserguidefor
thedevice.
— TheUSBadapterontheAudimusicinter-
facewillsupportiPodtouchoriPhonedevi-
cesfromthe5thgenerationornewerwith
thelightningconnector.
—Formoreinformationaboutthe Audimusic
interfaceandsupporteddevices,checkthe
Audidatabaseformobiledevicesatwww.
audiusa.com/mp3orcontactanauthorized
AudidealerorauthorizedAudiServiceFa-
cility.
USBchargingportsintherear
Appliesto:vehicleswithUSBchargingportsintherear
Youcanchargethebatteryon yourmobiledevice
throughaUSBchargingport.
Two USBchargingportsarelocatedatthebackof
the centerconsole.
—USBadapter:referto>page226,USBadapter
forAudi musicinterfaceorUSBchargingport.
—ChargingamobiledeviceusingtheUSB
adapter:connectyourmobiledevice toaUSB
chargingportusingasuitableUSBadapter.
—Disconnectingamobiledevicefromthecharg-
ingport:removetheUSBadapterfromtheUSB
chargingport.
—DisconnectingmobiledeviceswithanApple
Dockconnector:removetheAppleDockcon-
nectorfromtheAppledevicewiththerelease
tabspressedin.

Z\WARNING
Drivingrequiresyourcomplete andundivided
attention.Asthedriver,youhavecompletere-


sponsibilityforsafetyintraffic.Neveroperate

228

yourmobiledeviceswhiledriving,because
thisincreasestheriskofanaccident.
()Note
Extremelyhighorlowtemperaturesthatcan
occurinsidevehiclescandamagemobiledevi-
cesand/orimpairtheirperformance.Never
leavemobiledevicesinthevehicleinex-
tremelyhighorlowtemperatures.
G)Tips
—Inpreparationatthetimeofprinting.
—Alwaysfollowtheinformationfoundin
=>page62.
—Whenyouswitchtheignitionoff,theUSB
portsarestillsuppliedwithpoweruntilthe
energymanagementintervenes.
—DonotuseanyadditionalUSBextensionca-
blesoradapterstoconnectmobiledevices
totheUSBchargingport thathavealready
beenconnectedbyaUSBadapter.Usingan
additionaladapterorUSextensioncable
mayimpairfunctionality.

—USBhubsarenotsupported.
—Refertothemanufacturer'soperatingman-
ualforimportantinformationregardingthe
operationofyourmobiledevice.
—Correctfunctionofallmobiledevicescan-
notbeguaranteed.
— Thevehiclebatterydrainswhenmobilede-
vicesareturnedonbuttheengineisoff.
Rear SeatEntertainmentpreparation
Appliesto:vehicleswith Rear SeatEntertainmentpreparation
TheRear SeatEntertainmentpreparationin-
cludescablesandamountforAudiEntertain-
mentmobileinthedriver'sandfrontpassenger's
seatbackrests.
ThesuitableAudiEntertainmentmobileRear
SeatEntertainmentpackageisavailablethrough
AudiGenuineAccessories.
UsingAudiGenuineAccessoriesisrecommended.
Audihasverifiedtheirreliability,safety,andsuit-
ability.

8W0012721BG
CheckingandFilling

CheckingandFilling
Fuel
ahemelt)
Thecorrectgasolinegradeisstatedontheinside
ofthefuelfillerdoor.
Thevehicleisequippedwithacatalyticconverter
andmustonlybedrivenwithunleadedgasoline.
AudirecommendsusingTOPTIERDetergentGas-
oline.ForadditionalinformationonTOPTIERDe-
tergentGasoline,visitwww.toptiergas.com.
Theindividualgasolinegradesaredifferentiated
byoctaneratings.Thisvalueisgivenwith(R
+M)/2equatingtoAKIorinRON.
Theheadingsbelowmatchthestickerinthefuel
fillerdoor.
UNLEADEDFUELONLYMIN.(R+M)/287
Regular/MIN.RON91Regular
Useregulargasolinewithminimum87AKI/
91RON>©.
Themaximumenginepowerisonlyreachedif
premiumgasoline91AKI/95RONisused.
UNLEADEDFUELONLYPREMIUMMIN.(R
+M)/291/SUPERMIN.RON95
Usingpremiumgasolinewithminimum91AKI/
95RONisrecommended.
Ifpremiumgasolineisnotavailable,youcanalso
useregulargasoline87AKI/91RON.However
thisdoesreduce theenginepowerslightly.
@)Note
—Fillingthetankjustonetimewithleaded
fuel orothermetallicadditiveswillcause
permanentdeteriorationtothecatalytic
converterfunction.
—Whengasolinewithanoctaneratingthatis
toolowisused,highspeedsorheavyengine
loadcanleadtoenginedamage.
@Tips
Thevehiclemaybefilledwithfuelthathasa
higheroctaneratingthanwhatisrequiredby
theengine.
Gasolinemixture
GasolinewithalcoholorMTBE(Methyl-Tert-
Butyl-Ether)
Youcan useunleadedgasolinemixedwithalco-
holorMTBE(generallylabeledasoxygenated
compounds)aslongasthefuelmeetsthefollow-
ingconditions:
Gasolinewithmethanolcontent(methylalco-
holormethanol)
—Anti-KnockIndexisatleast87AKI
—Nomorethan3%methanol
—Morethan2%solvent
Gasolinewithethanolcontent(ethylalcoholor
ethanol)
—Anti-KnockIndexisatleast87AKI
—Nomorethan15%ethanol
GasolinewithMTBEcontent
—Anti-KnockIndexisatleast87AKI
—Nomorethan15%MTBE
Gasolineadaptedtotheseason
Manygasolinefuelsareadaptedtotheseasons.
Whentheseasonchanges,werecommendrefu-
elingathigh-trafficgasstations.Itismorelikely
thatthegasolinewillbesuitablefortheseason
there.
()Note
—Gasolinewithmethanolcontentthatdoes
notmeetthespecifiedconditionsmaycause
corrosiondamageanddamagetoplasticor
rubbercomponentsinthefuelsystem.
—Donotusegasoline thatdoesnotmeetthe
specifications.
—Ifyouareunabletofindoutifaspecificgas-
olinemixturemeetsthespecifications,ask
the gasstationoperatorortheirfuelsuppli-
er.
305
>

CheckingandFilling

—Donotuseanygasolinemixturewhose
compositioncannotbeidentified.
—Audidoesnotassumeanyresponsibilityfor
damagetothefuelsystemorforperform-
ance
problemscausedbyusinggasoline
mixturesdifferentfromthosespecified.
Thistypeofdamagealsodoesnotfallunder
theNewVehicleLimitedWarrantyorunder
the emissionscontrolsystemwarranty.
—Ifyounoticeahigherfuelconsumptionor
poorhandlingorperformanceproblemsdue
tosuchgasolinemixtures,werecommend
fuelingwithunblendedgasoline.
Gasolineadditives
Animportantissueformanyautomobilemanu-
facturersiscombustionresidueintheengine
thatresultsfromtheuseofcertainfuels.
Althoughtypesofgasolinedifferdependingon
themanufacturer,therearesimilarities.Certain
substancesinthegasolinemaycausedepositsin
theengine.Additivesinthegasolinethatshould
keeptheengineandfuelsystemcleandonotall
functionequally.
AudirecommendsusingTOPTIERDetergentGas-
oline.ForadditionalinformationonTOPTIERDe-
tergentGasoline,visitwww.toptiergas.com.
Ifyouuseincorrectfuelsoveralongperiodof
time,themaximumengineperformancemaybe
impairedby combustionresidue.
@)Note
Damageormalfunctionscausedbytheuseof
incorrecttypesofgasolinearenotcoveredby
theNewVehicleLimitedWarranty.
306
Refueling
Fuelingprocedure


Fig.249Rightrearsideofthevehicle:openingthefuel
fillerdoor

Fig.250Fuelfillerdoorwithattachedfuelcap
Thefuelfillerdoorisunlockedorlockedbythe
central lockingsystem.
>Pressontheleftsideofthefuelfillerdoorto
openit>fig.249.
>Unscrewthetankcapcounterclockwise.
» Placethecapfromaboveontheopenfuelfiller
doorfig.250.
> Insertthefuelpumpnozzleallthewayintothe
fuelfillerneck.
>Beginfueling.Oncethefuelpumpnozzleturns
offthefirsttime,thefueltankisfull.Donot
continuefueling, or elsetheexpansionspacein
thetankwillbefilledwithfuel.
> Afterthefuelpumphasswitchedoff,waitfive
secondsbeforeremovingthenozzletoallow
therestofthefueltofinishdrippingintothe
fueltank.
>Turn thefuelcapclockwiseuntilitclicksinto
place.
>Closethefuelfillerdoorandthenpressonthe
leftsideuntilitlatches.

8W0012721BG
CheckingandFilling

Thecorrectfueltypeforyourvehiclecanbe
foundonalabellocatedontheinsideofthefuel
fillerdoor.Foradditionalinformationonfuel,see
=>page305.
Forthetankcapacityinyourvehicle,refertothe
TechnicalData>page373.
Toreducetheriskoffuelleakingoutorvapors
escaping,makesurethatthefueltankisclosed
correctly.OtherwisetheEyindicatorlightwill
turnon.
Ifthecentral lockingsystemmalfunctions,there
isafuelfillerdooremergencyrelease
=>page308.


Z\WARNING
Improperfuelingproceduresandimproper
handlingoffuelcanlead toexplosions,fires,
severeburns,andotherinjuries.
—Donotsmoke.Keepawayfrom openflames.
—Theignitionmustbeswitchedoffwhenre-
fueling.
—Mobiledevices,radiodevices,andotherra-
dioequipmentshouldalways be switched
offwhenrefueling.Electromagneticrays
couldcausesparksandstartafire.
—Ifyoudonotinsertthefuelpumpnozzleall
thewayintothefillertube,thenfuelcan
leakout.Spilledfuelcanigniteandstarta
fire.
—Nevergetintothevehiclewhenrefueling.If
thereisanexceptionalsituationwhereyou
mustenterthevehicle,closethedoorand
touchametalsurfacebeforetouching the
fuelpumpnozzleagain.Thiswillreducethe
riskofelectrostaticdischargethatcancause
flyingsparks.Sparks canstarta firewhen
refueling.

—Ifyoumusttransportfuelinafuelcontain-
er,notethefollowing:
—Alwaysplacethefuelcontaineronthe
groundbeforefilling.Neverfillthefuel
containerwithfuelwhileitisinsideoron
thevehicle.Electrostaticdischargecanoc-
curwhilerefuelingandthefuelvapors
couldignite.
—Whenusingfuelcontainersmadeofmet-
al,thefuelpumpnozzlemustalwaysre-
mainincontactwiththecontainertore-
ducetheriskofstaticcharge.
—Insertthefuelpumpnozzleasfaraspos-
sibleintothefilleropeningwhilerefuel-
ing.
—Followtheapplicablelegalregulationsin
thecountrywhereyouaredrivingwhen
using,storingandtransportingfuelcon-
tainers.
—Makesurethatthefuelcontainermeets
theindustrystandards,forexampleANSI
orASTMF852-86.


Z\WARNING
Transportingfuelcontainersinsidethevehicle
isnotrecommended.Fuelcouldleakoutof
thecontainerandignite,especiallyduringan
accident.Thiscan causeexplosions,fires,and

injuries.


)Dependingontheengine
()Note
—Removefuelthathasoverflowedontoany
vehiclecomponentsimmediatelytoreduce
theriskofdamagetothevehicle.
—Neverdriveuntilthefueltankiscompletely
empty.Theirregularsupplyoffuelthatre-
sultsfromthatcan causeenginemisfires.
Uncombustedfuelmayentertheexhaust
systemandincreasetheriskofdamageto
thecatalyticconverter.
(@)Forthesakeoftheenvironment
Donotoverfillthefueltank,orfuelcouldleak
outwhenthevehicleiswarmingup.
@)Tips
Thefuelfillerdoor onyourvehicledoesnot
lockifyoulockthevehiclefromtheinsideus-
ing
thecentral lockingswitch.
307

CheckingandFilling

Fuelfillerdooremergencyrelease
Ifthecentrallockingsystemmalfunctions,the
fuelfillerdoorcanbe unlockedmanually.

Fig.251Rightsidetrimpanelintheluggagecompart-
ment:openingthetrimpanel


Fig.252Luggagecompartment:fuelfillerdooremergency
release
Theemergencyopeningmechanismislocated
behindtherightsidetrimpanelintheluggage
compartment.
>Openthecoverinthesidepanel>fig.251.
>Tounlockthefuelfillerdoor,loosen theloop
fromtheretainerandthenpullontheloop
carefully>fig.252>@.
>Pressontheleftsideofthefuelfillerdoorto
openit>page306,fig.249.
®Note
Onlypullontheloopuntilyoufeelresistance.
Youwillnothearitrelease.Ifyoucontinueto
pull,youcoulddamagetheemergencyre-
leasemechanism.
308

Catalyticconverter
Thevehiclemayonlybedrivenwithunleaded
gasoline,orthecatalyticconverterwillbede-
stroyed.
Neverdriveuntilthetankiscompletelyempty.
Theirregularsupplyoffuelthatresultsfromthat
cancauseenginemisfires.Uncombustedfuel
couldentertheexhaustsystem,whichcould
causeoverheatinganddamagetothecatalytic
converter.

ZAWARNING
Thetemperatureoftheexhaustsystemis
high,bothwhendrivingandafterstopping
the
engine.
—Nevertouchtheexhausttailpipesoncethey
havebecomehot. Thiscouldresultinburns.
—Donotparkyourvehicleoverflammable
materialssuchasgrassorleavesbecause
thehightemperatureoftheemissionssys-
temcouldstartafire.
—Donotapplyunderbodyprotectantinthe
exhaustsystemarea,becausethisincreases
theriskoffire.

OnBoardDiagnostic
System(OBD)
TheOnBoardDiagnosticSystemmonitorsthe
engineandtransmissioncomponentsthatinflu-
enceemissions.

Fig.253Footwellonleftside ofthevehicle:connection
portfortheOnBoardDiagnosticSystem(OBD)