2019 AUDI A4 differential

8W0012721BG

Quickaccess

ElectronicStabilizationControl
(ESC)
=>page139
Brakesystem
=>page21
Anti-lockbrakingsystem(ABS)Y
=>page24
Anti-lockbrakingsystem(ABS)¥
=>page24
Safetysystems¥
=>page23
Brakepads
=>page21
Electromechanicalparkingbrake
=>page22
Tirepressure
=>page340
Tirepressure
=>page340
Drivesystem
=>page24
MalfunctionIndicatorLamp(MIL)
v
=>page308
Enginespeedlimitation
=>page24
Engineoillevel(MIN)
=>page312
Engineoillevel(MAX)
=>page312
Engineoilsensor
=>page312
Enginewarm-uprequest
=>page313
Electricalsystem
=>page317
Tanksystem
=>page24
Washerfluidlevel
=>page25
Windshieldwipers
=>page25

Keys
=>page 78
Driver'sdoor
=>page25
Batteryinvehiclekey
=>page30
Bulbfailureindicator
=>page25
Headlightrangecontrolsystem
=>page25
Adaptivelight
=>page25
Light/rainsensor
=>page25
Activelaneassist
>page118
Audisideassist
>page126
Audipresense
=>page117
Parkingaid
=>page137
Transmission(automatictransmis-
sion)
=>page90,
Clutch(manualtransmission)
>page 23
Steeringlock
=>page 23
Enginestartsystem
=>page23
Electromechanicalsteering
=>page142
Suspensioncontrol
=>page26
Allwheeldrive/sportdifferential
=>page26
Emergencycallfunction
=>page197

Otherindicatorlights
Turnsignals
>page26>
11

Instrumentcluster

Thereisamalfunctionintheclutch.Theengine
torque
thatcan betransferredisreduced.You
maycontinuedriving.Avoidusingtheclutchin
thefutureinanywaythatwillplaceaheavyload
onit.Forexample,donotlettheclutchrubwhen
startingonhillsorwhenmaneuveringthevehi-
cle.Theindicatorlightturnsoffoncetheclutchis
fullyoperableagain.
Ifthe|indicatorlightturnson,thehoodlock
isnotlatchedcorrectly.
Stopimmediatelyandclosethehood
=>page310.

ElectronicStabilizationControl(ESC)
IftheBindicatorlightblinkswhiledriving,the
ESCorASR(Anti-SlipRegulation)isactivelyregu-
lating.
IftheBindicatorlightturnson,thesystemhas
switched
theESCoff.Inthiscase,youcanswitch
theignitionoffandthenontoswitchtheESCon
again.Theindicatorlightturnsoffwhenthesys-
temisfullyfunctional.
IftheBindicatorlightturnson,ESCwas
switchedoffusingthe[2]button>page139.


Stabilizationcontrol(ESC/ABS):malfunction!
Seeowner'smanual
IftheBindicatorlampandtheES/assin-
dicatorlampturnonandthismessageappears,
theABSorelectronicdifferentiallockismalfunc-
tioning.ThisalsocausestheESCtomalfunction.
Thebrakesstillfunctionwiththeirnormalpower,
butABSisnotactive.
DrivetoanauthorizedAudidealerorauthorized
AudiServiceFacilityimmediatelytohavethe
malfunctioncorrected.
@Tips
ForadditionalinformationonESCandABS,
see>page138.
24
BDrivesystem:malfunction!Safelystopvehi-
cle
Thereisamalfunctioninthedrivesystem.The
brakeboosterandthepowersteeringmaystop
working.
Stopthevehicleimmediatelyor assoon
aspossibleand donotcontinuedriving.Havethe
problemcorrectedbyanauthorizedAudidealer
orauthorizedAudiServiceFacility.
BDrivesystem:malfunction!Pleasecontact
Service
Thereisamalfunctioninthedrivesystem.Drive
slowlytoanauthorizedAudidealerorauthorized
AudiServiceFacilitytohavethemalfunctioncor-
rected.

nginespeedlimitation
IftheBiindicatorlightturnson,theenginewill
beautomaticallylimitedtotheRPMdisplayedin
theinstrumentcluster.Thisprotectstheengine
fromoverheating.
Theenginespeedlimitationdeactivatesoncethe
engineisnolongerinthecriticaltemperature
rangeandyouhavereleasedtheacceleratorped-
alonce.
Iftheenginespeedlimitationwasactivatedby
anenginecontrolmalfunction,theBgindicator
lightalsoturnson.Makesuretheenginespeed
doesnotgoabovethespeeddisplayed,forexam-
plewhendownshifting.Drivetoanauthorized
AudidealerorauthorizedAudiServiceFacilityim-
mediatelytohavethemalfunctioncorrected.
fTanksystem
lyPleaserefuel
Iftheindicatorlightturnsonforthefirsttime
andthemessageappears,thereareabout2.1
gallons(8liters)offuelleftinthetank.
lyPleaserefuelimmediately
Iftheindicatorlightturnsonandthismessage
appears,thefueltankisalmostempty.Refuel
thevehicleimmediately.

Instrumentcluster

Youcanstillcontrolallfunctionsthatareinde-
pendentoftherainsensorthroughthewind-
shieldwiperlever.
DrivetoanauthorizedAudidealerorauthorized
AudiServiceFacilityimmediatelytohavethe
malfunctioncorrected.
{Suspensioncontrol
Appliesto:vehicleswithsuspensioncontrol
18|Suspension:malfunction!Youmaycontinue
driving
Thereisamalfunction.SeeanauthorizedAudi
dealerorauthorizedAudiServiceFacilityforas-
sistance.
beeNatMeleelametale)
Appliesto:vehicleswithallwheeldrive/sportdifferential
3All-wheeldrive:malfunction!Youmaycon-
tinuedriving.PleasecontactService
iT-3|Sportdifferential:malfunction!Pleasecon-
tactService
DrivetoanauthorizedAudidealerorauthorized
AudiServiceFacilityimmediatelytohavethe
malfunctioncorrected.
EH]All-wheeldriveoverheating.Pleaseadapt
drivingstyle.Seeowner'smanual
3}Sportdifferential:temperaturetoohigh.
Pleaseadaptdrivingstyle
Thetransmissiontemperaturehasincreasedsig-
nificantlyduetothesportydrivingmanner.Drive
inalesssportymanneruntilthetemperaturere-
turnstothenormalrangeandtheindicatorlight
switchesof.

ZXWARNING
ContactanauthorizedAudidealerorauthor-
izedAudiServiceFacilityiftheallwheeldrive/
sportdifferentialisfaultyormalfunctioning.
Therepairmustbeperformedbytrainedper-
sonnelusingthecorrectoilinordertoensure
safety.

26
ereasercy
IftheaorByindicatorlightblinks,aturnsig-
nalisturnedon.Ifbothindicatorlightsareblink-
ing,theemergencyflashersare on.
Ifanindicatorlightblinkstwiceasfastasusual,
aturnsignalbulbhasfailed.Carefullydrivetoan
authorizedAudidealerorauthorizedAudiService
Facilityimmediatelytohavethe malfunctioncor-
rected.

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.

8W0012721BG
Assistsystems

Suspensioncontrol*
Thesuspensioncontrol*usessensorsto record
informationregardingsteeringmovements,
brakingandaccelerationoperationsbythedriver,
roadsurface,drivingspeed,andload.Thismakes
itpossibletoadaptdampingtothedrivingsitua-
tionnearlyinrealtime.Withdriveselect,youcan
adjustthesuspensioncontroltosporty(Dynam-
ic),comfortable(Comfort)orbalanced(Auto).
Steering
Thepowersteeringadapts.Indirectsteeringthat
moveseasilyasinComfortmodeisespecially
suitedtolongdrivesonhighways.TheDynamic
modeprovidessporty,directsteering.
Thefollowingappliestovehicleswithdynamic
steering*:thesteeringratiochangesbasedonve-
hiclespeedinordertomaintainoptimumsteer-
ing effortforthedriver atalltimes.Thissetsthe
steering tobelesssensitiveathigherspeedsin
ordertoprovideimprovedvehiclecontrol.Atre-
ducedspeeds,steeringismoredirectinorderto
keepthesteeringeffortasminimalaspossible
whenthedriverismaneuveringthevehicle.At
lowandaveragespeeds,dynamicsteering*addi-
tionallyprovidesmoreresponsivesteeringper-
formance.
Sportdifferential*
Asacomponentoftheallwheeldrivesystem
(quattro)>page143,thesportdifferentialdis-
tributesthedrivingpowertotherearaxlede-
pendingonthesituation.Thedistributionof
powervariesdependingontheselectedmode
frommoderate(Comfort)tosporty(Dynamic).
Thegoalisahighlevelofagilityandabilitytoac-
celerateoncurves.Thevehicleisveryresponsive
tosteering.
Adaptivecruisecontrol(ACC)*
Thebehaviorwhenacceleratingcanbeadjusted
fromcomfortabletosporty,dependingonthe
driveselectmode.Adaptivecruisecontrolalso
respondstothedrivingbehaviorofthevehicle
aheadinamoreconservativeorsportymanner.

Enginesound*
Theenginesoundadaptstothecurrentmode
andcan besubtletosporty.
@Tips
The"S"selectorleverpositionautomatically
engageswhentheDynamicmodeisselected.
Selectingthedrivingmode
Appliesto:vehicleswithAudidriveselect

B8W-0171
Fig.127Centerconsole:controlsfordriveselect
>Presstheleftorrightarrowkey>fig.127until
thedesiredmodeappearsintheinstrument
cluster/Infotainmentsystemdisplay.Or
>SelectintheInfotainmentsystem:[MENU]but-
ton>Vehicle>Audidriveselect.
>
Selectandconfirmthedesiredsetting.


Youcanchangethedrivingmodewhenthevehi-
cleisstationaryorwhiledriving.Iftrafficper-
mits, afterchangingmodes,brieflyremoveyour
footfromtheacceleratorpedalso thatthere-
centlyselectedmodeisalsoactivatedfortheen-
gine.
Offroad”-activatesoffroadfunctionstosupport
drivingonroughterrain.Theengine,transmis-
sionandsteeringadjustandtheStart/Stopsys-
tem*switchesoff.
Comfort-providesacomfort-orientedvehicle
setupandissuitedforlongdrivesonhighways.
Auto-providesanoverallcomfortableyetdy-
namicdrivingfeelandissuitedforeverydayuse.
Dynamic-givesthedriverasportydrivingfeel
andissuited toasportydrivingstyle.
Individual->page128.
127

Assistsystems

AdjustingtheIndividualmode
Appliesto:vehicleswithAudidriveselect
You canadjustthevehiclesettingstoyourpersonalpreferences.
>SelectintheInfotainmentsystem:

MENU but-Theequipmentinyourvehiclewilldetermine
ton>Vehicle>Audidriveselect>Individual>whichsettingsyoucanadjust.Thefollowingta-
rightcontrolbutton.blegivesanoverviewofthecharacteristics.
Afteryouhaveclosedthesettings,youwillauto-
maticallydriveintheIndividualmode.


Engine/transmissionbalanced balancedsporty
Steeringcomfortablebalancedsporty
Dynamicsteering*comfortable/indirect|balanced/directsporty/direct
Suspensioncontrol*comfortablebalancedsporty
Sportdifferential*Offbalancedsporty
Enginesound*subtlesubtle/sporty®sporty
ACC*comfortablebalancedsporty

2)Subtleintheselectorleverposition"D"andsportyin"S".
Yoursettings areautomaticallysavedinIndi-
vidualmode.
128

IntelligentTechnology

IntelligentTechnology
ElectronicStabilization
Control(ESC)
ElectronicStabilizationControl(ESC)supports
driversafety.Itreducestheriskofslippingand
improvesdrivingstability.ESCdetectscriticalsit-
uations,suchasifthevehicleisoversteeringor
understeering,orifthewheelsare spinning.The
brakesareappliedortheenginetorqueisre-
ducedinordertostabilizethevehicle.Whenthe
ESCengages,theBindicatorlightflashesinthe
instrumentcluster.
ThefollowingsystemsareintegratedintheESC:
Anti-lockbrakingsystem(ABS)
ABSpreventsthewheelsfromlockingwhenbrak-
ing.Thevehiclecanstillbesteeredevenduring
hardbraking.Applysteadypressuretothebrake
pedal.Donotpumpthepedal.Apulsinginthe
brakepedalindicatesthatthesystemisacting to
stabilizethevehicle.
Brakeassistsystem
Thebrakeassistsystemcandecreasebrakingdis-
tance.Itincreasesbrakingpowerwhenthe driver
pressesthebrakepedalquicklyinemergencysit-
uations.Youmustpressandholdthebrakepedal
untilthedangeroussituationisover.Invehicles
withadaptivecruisecontrol*,thebrakeassist
systemismoresensitiveifthedistancedetected
tothevehicledrivingaheadistoosmall.
Anti-SlipRegulation(ASR)
ASRreducesenginepowerwhenthedrivewheels
beginspinningandadaptstheforcetotheroad
conditions.Thismakesiteasiertostart,acceler-
ateanddriveuphills.
ElectronicDifferentialLock(EDL)
TheEDLappliesthe brakestowheelsthatare
slippingandtransfersthedrivepowertotheoth-
erwheels.Thisfunctionisnotavailableathigher
speeds.
138
Inextremecases,EDLautomaticallyswitchesoff
tokeepthebrakeonthebrakedwheelfromover-
heating.Thevehicleisstillfunctioningcorrectly.
EDLwillswitchonagainautomaticallywhencon-
ditionshavereturnedtonormal.
Powersteering
The ESCcanalsosupportvehiclestability
throughsteering.
Selectivewheeltorquecontrol
Selectivewheeltorquecontrolisusedwhendriv-
ingoncurves.Brakingistargetedtowardthe
wheelsontheinsideofthecurveasneeded.This
allowsmoreprecisedrivingincurves.
Automaticpost-collisionbrakingsystem
The“automaticpost-collisionbrakingsystem”
canhelptoreducetheriskofslidingandofaddi-
tionalcollisionsafteranaccident.Iftheairbag
controlmoduledetectsacollision,thevehicleis
braked bytheESC.
Thevehicledoesnotbrakeautomaticallyifoneof
thefollowingoccurs:
—Thedriverpressestheacceleratorpedal
—TheESC,thebrakesystem,orthevehicleelec-
tricalsystemisnotfunctioning

ZAWARNING
— The ESCanditsintegratedsystemscannot
overcomethelimitsimposedbynatural
physicallaws.Thisisespeciallyimportanton
slipperyorwetroads.Ifthesystemsbegin
actingtostabilizeyourvehicle,youshould
immediatelyalteryourspeedtomatchthe
roadandtrafficconditions.Donotletthein-
creasedsafetyprovidedtemptyouintotak-
ingrisks.Thiscouldincreaseyourriskofa
collision.
—Pleasenotetheriskofacollisionincreases
whendrivingfast,especiallythroughcurves
andonslipperyorwetroads,andwhendriv-
ingtooclosetoobjectsahead.The ESC and
itsintegratedsystemscannotalwayspre-
ventcollisions-thereisstillariskofacci-
dents!

8W0012721BG
IntelligentTechnology

—Foradditionalinformationondynamic
steering,see>page126.
Allwheeldrive(quattro)
Appliesto:vehicleswithallwheeldrive
Theall-wheeldrivesystemdistributesthedriving
powervariablytothefrontandrear axle toim-
provethedrivingcharacteristics.Itworkstogeth-
erwithselectivewheeltorquecontrol,whichcan
activatewhendrivingthroughcurves
=>page138.
Appliesto:vehicleswithquattroultra:Ifthedriv-
ingsituationdoesnotrequireallwheeldrive,
thentherearsectionofthedrivetrainwilldecou-
pletosavefuel.Thesystemconstantlydeter-
minesandanticipatesifallwheeldriveisneeded.
Thisallowsthereardrivetraintorecoupleshortly
beforeitisneeded.
Theallwheeldriveconceptisdesignedforhigh
enginepower.Yourvehicleisexceptionallypow-
erfulandhasexcellentdrivingcharacteristics
bothundernormaldrivingconditionsandon
snowandice.Alwaysreadandfollowsafetypre-
cautions>A\.

ZAWARNING
—Eveninvehicleswithallwheeldrive,you
shouldadaptyourdrivingstyletothecur-
rentroadandtrafficconditionstoreduce
theriskofanaccident.
— Thebrakingabilityofyourvehicleislimited
tothetractionofthewheels.Inthisway,it
isnotdifferentfromatwowheeldrivevehi-
cle.Donotdrivetoofastbecausethisin-
creasestheriskofanaccident.
—Notethatonwetstreets,thefrontwheels
can“hydroplane’”ifdrivingatspeedsthat
aretoohigh.Unlikefrontwheeldrivevehi-
cles,theengineRPMdoesnotincreasesud-
denlywhenthevehiclebeginshydroplaning.
Adaptyourspeedtotheroadconditionsto
reducetheriskofanaccident.

Sportdifferential
Appliesto:vehicleswithsportdifferential
Thesportdifferentialdistributesthedrivepower
totherearaxlebasedonthesituation.Thegoal
isahighlevelofagilityandabilitytoaccelerate
oncurves.Thevehicleisveryresponsivetosteer-
ing.ThesettingsdependontheselectedAudi
driveselect*mode.
Energymanagement
Yourvehicleisequippedwithanintelligentener-
gymanagementsystemfordistributingelectrici-
ty.Thissignificantlyimprovesthestartingability
andincreasesthevehiclebatterylife.
@)Tips
—Ifyoudriveshortdistancesfrequently,the
vehiclebatterymaynotchargeenough
whiledriving.Asaresult,conveniencefunc-
tionsforelectricalequipmentmaybetem-
porarilyunavailable.
—Thevehiclebatterywillgraduallydrainif
the
vehicleisnotdrivenforlongperiodsof
time,orifelectricalequipmentisused
whentheengineisnotrunning.Toensure
thatthevehiclecanstillbestarted,the
electricalequipmentwillbelimitedor
switchedoff.
Noticeaboutdata
recordedbytheEvent
DataRecorderand
vehiclecontrolmodules
EventDataRecorder
Thisvehicleisequippedwithan Event DataRe-
corder(EDR).ThemainpurposeofanEDRisto
record,incertaincrashornearcrash-likesitua-
tions,suchasanairbagdeploymentorhittinga
roadobstacle,datathatwillassistinunderstand-
inghowavehicle'ssystemsperformed.TheEDR
isdesignedto recorddatarelatedtovehicledy-
namics andsafetysystemsforashortperiodof
time,typically30secondsorless.TheEDRinthis
vehicleisdesignedtorecordsuchdataas:>
143