
Childsafety
onallthetimewhenevertheignitionis
switchedon.
—IfthePASSENGERAIRBAGOFF%;light
doesnotcomeonandstayon,immediate-
lyinstalltheforward-facingchildseatina
rearseatingpositionandhavetheairbag
systeminspectedbyyourauthorizedAudi
dealer.
—Alwaysbucklethechildseatfirmlyinplace
evenifa childisnotsittinginit.Aloose
childseatcanflyaroundduringasudden
stoporinacollision.
—AlwaysreadandheedallWARNINGS
wheneverusinga childrestraintinavehi-
cle>page258,Safetybelts,>page266,
Airbag
systemand>page288,Important
information.
@)Tips
Alwaysreplacechildrestraintsthatwerein-
stalledinavehicleduringacrash.Damageto
a childrestraintthatisnotvisiblecouldcause
ittofail inanothercollisionsituation.
ONETeeReameeMaalCele)
Yourvehicleisequippedwithan“AdvancedAir-
bagSystem”incompliancewithUnitedStates
FederalMotorVehicleSafetyStandard(FMVSS)
208,aswellasCanadaMotorVehicleSafety
Standard(CMVSS)208asapplicableatthetime
yourvehiclewasmanufactured.
TheAdvancedAirbagsysteminyourvehiclehas
beencertifiedtomeetthe“low-risk”require-
mentsfor3-and6-yearoldchildrenonthepas-
sengersideandsmalladultsonthedriverside.
Thelowriskdeploymentcriteriaareintendedto
reducetheriskofinjurythroughinteractionwith
theairbagthatcanoccur,forexample,bybeing
tooclosetothesteeringwheelandinstrument
panelwhentheairbaginflates.Inaddition,the
systemhasbeencertifiedtocomplywiththe
“suppression”requirementsoftheSafetyStand-
ard,toturnoffthefrontairbagforinfantsupto
12monthswhoarerestrainedonthefrontpas-
sengerseatinchildrestraintsthatarelistedin
theStandard.
290
EventhoughyourvehicleisequippedwithanAd-
vancedAirbagsystem,allchildren,especially
those12yearsandyounger,shouldalwaysridein
thebackseatproperlyrestrainedfortheirage
and
size.Theairbagonthepassengersidemakes
thefrontseatapotentiallydangerousplacefora
childtoride.Thefrontseatisnot thesafestplace
forachildinaforward-facingchildsafetyseat.It
canbeaverydangerousplaceforaninfantora
largerchildinarearward-facingseat.
Thevehicle'sAdvancedAirbagSystemhasaca-
pacitivepassengerdetectionsysteminthefront
passengerseatcushionthatcandetectthepres-
enceofababyorachildinachildrestraintsys-
temonthisseat.
Thecapacitivepassengerdetectionsystemregis-
tersthechangesthatresultinanelectricalfield
when achild,achildrestraint,andababyblanket
areonthefrontpassengerseat.Thechangein
themeasuredcapacitanceduetothepresenceof
achild,a childrestraint,andababyblanketon
thefrontpassengerseatisrelatedtothechildre-
straintsystemrestingontheseat.Themeasured
capacitanceofachildrestraintsystemvariesde-
pendingonthetypeofsystemandspecificmake
andmodel.
Theelectricalcapacitanceofthevarioustypes,
makes,andmodelsofchildrestraintsspecified
bytheU.S.NationalHighwayTrafficSafetyAd-
ministration(NHTSA)intherelevant safety
standardarestoredintheAdvancedAirbagSys-
temcontrolunittogetherwiththecapacitances
typicalofinfantsanda1-yearoldchild.Whena
child
restraintisusedonthefrontpassengerseat
withatypical1year-oldinfant,theAdvancedAir-
bagSystemcomparesthecapacitancemeasured
bythecapacitivepassengerdetectionsystem
withthedatastoredintheelectroniccontrol
unit.
CeaeReiteceaWahiteWayled
Regardlessofthechildrestraintthatyouuse,
makesurethatithasbeencertifiedtomeetSafe-
tyStandardsandhasbeencertifiedbyitsmanu-
facturerforusewithanairbag.Alwaysbesure
thatthechildrestraintisproperlyinstalledat>

Wheels
Wheels Wheels
andTires
Generalinformation
>Checkyourtiresregularlyfor
damage,suchaspunctures,
cuts,cracks,andbulges.Remove
foreignobjectsfromthetire
tread.
>Ifdrivingovercurbsorsimilar
obstacles,driveslowlyandap-
proachthecurbatanangle.
>Havefaultytiresorrimsre-
placedimmediately.
>Protectyourtiresfromoil,
grease,andfuel.
>Marktiresbeforeremoving
themsothatthesamerunning
directioncanbemaintainedif
theyarereinstalled.
>Laytiresflatwhenstoringand
storetheminacool,drylocation
withaslittleexposuretolightas
possible.
AWARNING
—Neverdrivefasterthanthe
maximumpermittedspeedfor
yourtires.Thiscouldcausethe
tirestoheatuptoomuch.This
increasestheriskofanacci-
dentbecauseitcancausethe
tiretoburst.
324
—Alwaysadaptyourdrivingto
theroadandtrafficcondi-
tions.Drivecarefullyandre-
duceyourspeedonicyorslip-
peryroads.Evenwintertires
canlosetractiononblackice.
()Note
—Pleasenotethatsummerand
wintertiresaredesignedfor
theconditionsthataretypical
inthoseseasons.Audirecom-
mendsusingwintertiresdur-
ingthe wintermonths.Low
temperaturessignificantlyde-
creasetheelasticityofsumm-
ertires,whichaffectstraction
andbrakingability.Ifsummer
tiresareusedinverycoldtem-
peratures,crackscanformon
thetreadbars,resultingin
permanenttiredamagethat
cancauselouddrivingnoise
andunbalancedtires.
—Burnished,polishedor
chromedrimsmustnotbe
usedinwinterdrivingcondi-
tions.Thesurfaceoftherims
doesnothavesufficientcorro-
sionprotectionforthisand
couldbepermanentlydam-
agedbyroadsaltorsimilar
substances.

80A012721BG
Wheels
Tiredesignations
B8K-2316
Fig.264Tiredesignationsontheside-
wall
@Tiresforpassengervehicles
(ifapplicable)
“P”indicatesatireforapassen-
gervehicle.“T”indicatesatire
designatedfortemporaryuse.
@Nominalwidth
Nominalwidthofthetirebe-
tweenthesidewallsinmillime-
ters.Ingeneral:thelargerthe
number,thewiderthetire.
@)Aspectratio
Height/widthratioexpressedasa
percentage.
@Tireconstruction
“R”indicatesaradialtire.
©)Rimdiameter
Sizeoftherimdiameterininches.
©Loadindexandspeedrating
Theloadindexindicatesthetire's
load-carryingcapacity.
Thespeedratingindicatesthe
maximumpermittedspeed.Also
see>AinGeneralinformationon
page324.
“EXTRALOAD”,“xl”or“RF”indi-
catesthatthetireisreinforcedor
isanExtraLoadtire.
Speedrat-/Maximumpermittedspeed
ing
Pupto93mph(150km/h)
Qupto99mph(160km/h)
Rupto106mph(170km/h)
Supto110mph(180km/h)
Tupto118mph(190km/h)
Uupto124mph(200km/h)
Hupto130mph(210km/h)
Vvupto149mph(240km/h)?
Zzabove149mph(240km/h)?
wupto168mph(270km/h)?
Yupto186mph(300km/h)?
@)Fortiresabove149mph(240km/h),
tiremanufacturerssometimesusethe
code“ZR”.
325

Wheels
@USDOTnumber(TIN)and
manufacturedate
Themanufacturedateislistedon
thetiresidewall(itmayonlyap-
pearontheinnersideofthetire):
DOT...2218...
means,forexample,thatthetire
wasproducedinthe22ndweekof
theyear2018.
@)AudiOriginalTires
AudiOriginalequipmenttires
withthedesignation“AO”have
beenspeciallymatchedtoyour
Audi.Whenusedcorrectly,these
tiresmeetthehigheststandards
forsafetyandhandling.Anau-
thorizedAudidealerorauthor-
izedAudiServiceFacilitywillbe
abletoprovideyouwithmorein-
formation.
@)Mudandsnowcapability
“M/S”or“M+S”indicatesthetire
issuitablefordrivingonmudand
snow./A\indicatesawintertire.
Compositionofthetirecord
andmaterials
Thenumberofpliesindicatesthe
numberofrubberizedfabriclay-
ersinthetire.Ingeneral:the
morelayers,themoreweighta
tirecancarry.Tiremanufacturers
326
mustalsospecifythematerials
usedinthetire.Theseinclude
steel,nylon,polyesterandother
materials.
@)Maximumpermittedload
Thisnumber indicatesthemaxi-
mumloadinkilogramsand
poundsthatthetirecancarry.
@Uniformtirequalitygrade
standardsfortreadwear,
tractionandtemperature
resistance
Treadwear,tractionand tempera-
tureranges>page340.
@Runningdirection
Thearrowsindicatetherunning
directionofunidirectionaltires.
Youmustalwaysfollowthespeci-
fiedrunningdirection
>page354.
Maximumpermitted
inflationpressure
Thisnumber indicatesthemaxi-
mumpressuretowhichatirecan
beinflatedundernormaloperat-
ingconditions.

80A012721BG
Wheels
Glossaryoftireandloading
terminology
Accessoryweight
meansthecombinedweight(in
excessofthosestandarditems
whichmaybereplaced)ofauto-
matictransmission,powersteer-
ing,powerbrakes,powerwin-
dows,powerseats,radio,and
heater,totheextentthatthese
itemsareavailableasfactory-in-
stalledequipment(whetherin-
stalledornot).
Aspectratio
meanstheratioofthe heightto
thewidthofthetireinpercent.
Numbersof55orlowerindicatea
lowsidewallforimprovedsteer-
ingresponseandbetteroverall
handlingondrypavement.
Bead
meansthepartofthetirethatis
madeofsteelwires,wrappedor
reinforcedbyplycordsandthatis
shapedtofittherim.
Beadseparation
meansabreakdownofthebond
betweencomponentsinthebead.
Cord
meansthestrandsformingthe
pliesinthetire.
Coldtireinflationpressure
meansthetirepressurerecom-
mendedbythevehiclemanufac-
turerforatireofadesignated
sizethathasnotbeendrivenfor
morethanacoupleofmiles(kilo-
meters)atlowspeedsinthethree
hourperiodbeforethetirepres-
sureismeasuredoradjusted.
Curbweight
meanstheweightofamotorve-
hiclewithstandardequipmentin-
cludingthemaximumcapacityof
fuel,oil,andcoolant,aircondi-
tioningandadditionalweightof
optionalequipment.
Extraloadtire
meansatiredesignedtooperate
athigherloadsandathigherin-
flationpressuresthanthecorre-
spondingstandardtire.Extraload
tiresmaybeidentifiedas“XL”,
“xL’,“EXTRALOAD”,or“RF”on
thesidewall.
327

Wheels
GrossAxleWeightRating
(“GAWR”)
meanstheload-carryingcapacity
ofasingleaxlesystem,measured
atthetire-groundinterfaces.
GrossVehicleWeightRating
(“GVWR”)
meansthemaximumtotalloaded
weightofthevehicle.
Groove
meansthespacebetweentwoad-
jacenttreadribs.
Loadrating(code)
meansthemaximumloadthata
tireisratedtocarryforagivenin-
flationpressure.Youmaynotfind
thisinformationonalltiresbe-
causeitisnotrequiredbylaw.
Maximumloadrating
meanstheloadratingforatireat
themaximumpermissibleinfla-
tionpressureforthattire.
Maximumloadedvehicle
weight
meansthesumof:
(a)Curbweight
(b)Accessoryweight
(c)Vehiclecapacityweight,and
(d)Productionoptionsweight
328
Maximum(permissible)
inflationpressure
meansthemaximumcoldinfla-
tionpressuretowhichatiremay
beinflated.Alsocalled“maxi-
muminflationpressure.”
Normaloccupantweight
means150lbs.(68kilograms)
timesthenumberofoccupants
seatedinthevehicleuptotheto-
talseatingcapacity ofyourvehi-
cle.
Occupantdistribution
meansdistributionofoccupants
inavehicle.
Outerdiameter
meanstheoveralldiameterofan
inflatednewtire.
Overallwidth
meansthelineardistancebe-
tweentheexteriorsoftheside-
wallsofaninflatedtire,including
elevationsduetolabeling,deco-
rations,orprotectivebandsor
ribs.
Ply
meansalayerofrubber-coated
parallelcords.

80A012721BG
Wheels
Productionoptionsweight
meansthecombinedweightof
thoseinstalledregularproduction
optionsweighingover5lbs.
(2.3kg)inexcessofthosestand-
arditemswhichtheyreplace,not
previouslyconsideredincurb
weightoraccessoryweight,in-
cludingheavy dutybrakes,ride
levelers,roofrack,heavyduty
battery,andspecialtrim.
Radialplytire
meansapneumatictireinwhich
theplycordsthatextendtothe
beadsarelaidatsubstantially
90degreestothecenterlineof
thetread.
Recommendedinflation
pressure
see>page327,Coldtireinfla-
tionpressure.
Reinforcedtire
meansatiredesignedtooperate
athigherloadsandathigherin-
flationpressuresthanthecorre-
spondingstandardtire.Rein-
forcedtiresmaybeidentifiedas
“XL”,“xl”,“EXTRALOAD”,or“RF”
onthesidewall.
Rim
meansametalsupportforatire
oratireandtubeassemblyupon
whichthetirebeadsareseated.
Rimdiameter
meansnominaldiameterofthe
beadseat.Ifyouchangeyour
wheelsize,youwillhavetopur-
chasenewtirestomatchthenew
rimdiameter.
Rimsizedesignation
meansrimdiameterandwidth.
Rimwidth
meansnominaldistancebetween
rimflanges.
Sidewall
meansthatportionofatirebe-
tweenthetreadandbead.
Speedrating(lettercode)
meansthespeedatwhichatireis
designedtobedrivenforextend-
edperiodsoftime.Theratings
rangefrom93mph(150km/h)
to186mph(298km/h)>table
onpage325.Youmaynotfind
thisinformationonalltiresbe-
causeitisnotrequiredbylaw.
Thespeedratinglettercode,
whereapplicable,ismoldedon
thetiresidewallandindicatesthe>
329

Wheels
maximumpermissibleroad
speeds.Seealso>AinGeneral
informationonpage324.
Tirepressuremonitoring
system
meansasystemthat detects
whenoneormoreofavehicle's
tiresareunderinflatedandillumi-
natesalowtirepressurewarning
telltale.
Tread
meansthatportionofatirethat
comesintocontactwiththeroad.
Treadseparation
meanspullingawayofthetread
fromthetirecarcass.
Treadwearindicators(TWI)
meanstheprojectionswithinthe
principalgroovesdesignedtogive
avisualindicationofthedegrees
ofwearofthetread.See
=>page333,Treadwearindicator
formoreinformationonmeasur-
ingtirewear.
UniformTireQualityGrading
isatireinformationsystemdevel-
opedbytheUnitedStates Nation-
alHighwayTrafficSafetyAdminis-
tration(NHTSA)thatisdesigned
tohelpbuyersmakerelativecom-
330
parisonsamongtires.TheUTQGis
notasafetyratingandnotaguar-
anteethatatirewill lastfora
prescribednumberofmiles(kilo-
meters)orperforminacertain
way.Itsimplygivestirebuyers
additionalinformationtocom-
binewithotherconsiderations,
suchasprice,brandloyaltyand
dealerrecommendations.Under
UTQG,tiresaregradedbythetire
manufacturersinthreeareas:
treadwear,traction,andtempera-
tureresistance.TheUTQGinfor-
mationonthetires,moldedinto
thesidewalls.
U.S. DOTTireIdentification
Number(TIN)
Thisisthetire’s“serialnumber”.
Itbegins withtheletters“DOT”
andindicatesthatthetiremeets
allfederalstandards.Thenext
twonumbersorlettersindicate
theplantwhereitwasmanufac-
tured,andthelastfournumbers
representtheweekandyearof
manufacture.Forexample,
DOT...2218...
meansthatthetirewasproduced
inthe22ndweekof2018.The
othernumbersaremarketingco-
desthatmayormaynotbeused>