2019 AUDI TT COUPE change wheel

8S1012721BA
Parkingaid

Ceeace1od}
Appliesto:vehicleswithrearviewcamera

BFV-0086
Fig.84Diagram:areacovered@)andareanotcovered(2)
bythe rearviewcamera.

BFV-0087


Fig.85Luggagecompartmentlid:locationoftherear-view
camera
Therearviewcameraislocatedabovetherearli-
censeplatebracket.Makesurethatthelensfor
theparkingsystem>fig.85isnotcoveredbyde-
positsoranyotherobstructionsbecausethiscan
impairthefunctionoftheparkingsystem.Forin-
formationoncleaning,see>page270.
Therearviewcameracoverageareaincludes(4)
=>fig.84.OnlythisareaisshownintheInfotain-
mentdisplay.Objectsthatareinarea(2),whichis
notcovered,arenotdisplayed.

Z\WARNING
—Alwaysreadandfollowtheapplicablewarn-
ings>A\inIntroductiononpage78.
—Ifthepositionandtheinstallationangleof
therearviewcamerawaschanged,forexam-
pleafteracollision,donotcontinuetouse
thesystemforsafetyreasons.Haveit
checkedbyanauthorizedAudidealerorau-
thorizedAudiServiceFacility.
—Onlyuse therearviewcameratoassistyouif
itshowsagood,clearpicture.Forexample,


theimagemaybeaffectedbythesunshin-
ingintothelens,dirtonthelens,orifthere
isamalfunction.
—Usetherearviewcameraonlyiftheluggage
compartmentlidiscompletelyclosed.Make
sureanyobjectsyoumayhavemountedon
theluggagecompartmentliddonotblock
therearviewcamera.
— Thecameralensenlargesanddistortsthe
fieldofvision.Theobjectappearsbothal-
teredandinaccurateonthescreen.
—Incertainsituations,peopleor objectsin
thedisplayappearcloserorfartheraway:
—Forobjectsthatdonottouchtheground,
suchasthebumperofaparkedvehicle,a
trailerhitchortherearofatruck.Donot
usetheorientationlinesinthiscase.
—Ifdrivenfromalevelsurfaceontoanin-
cline,oradownwardslope.
—Ifdriventowardprotrudingobjects.
—Ifthevehicleiscarryingtoomuchloadin


therear.
CG)Note
—Alwaysreadandfollowtheapplicablewarn-
ings>@inIntroductiononpage78.
—Theorange-coloredorientationlinesinthe
Infotainmentdisplayshowthevehiclepath
basedonthesteeringwheelangle.The
front ofthevehicleswingsoutmorethan
therearofthevehicle.Maintainplentyof
distanceso thatanexteriormirrororacor-
nerofthevehicledoesnotcollidewithany
obstacles.
SicLeRoi
Appliesto:vehicleswithrearviewcamera

Switchingon
>Shiftintoreverse,or
>PresstheP”buttoninthecenterconsole
=>page80,fig.81.Ashortconfirmationtone
soundsandtheLEDinthebuttonturnson.
Switchingoff
>Drivefasterthan6mph(10km/h),or
>PressthePvbutton,or
>»Switchtheignitionoff.
81

Parkingaid

@®Tips
—Thevisualdisplayintheleftpartofthedis-
playshouldhelpyoudetectthecriticalvehi-
cleareas.
—Youcanchangethevolumeofthesignals
andthedisplay>page82.
Perpendicularparking
Appliesto:vehicleswithrearviewcamera
Thisviewmaybe usedwhenparkinginagarage
orinaparkingspace.
4d.Look!Safetomove?

Fig.87Infotainmentsystem:aligningthevehicle
>Turn theInfotainmentsystemonandshiftinto
reversegear.
>Theorangeorientationlines@showthevehi-
cle'sdirectionoftravel.Turn thesteeringwheel
untiltheorangeorientationlinesalignwiththe
parkingspace>fig.86.Usethemarkings@)to
helpyouestimatethedistancetoanobstacle.
Eachmarkingrepresentsapproximately3 feet
(1m).Thebluearearepresentsanextensionof
thevehicle'soutlinebyapproximately16ft(5
meters)totherear.
>Whiledrivinginreversegear,adjustthesteer-
ingwheelangletofittheparkingspaceusing
theorangeorientationlinesforassistance>/\
82
inGeneralinformationonpage81,>@)in
Generalinformationonpage81.Area@)repre-
sentstherearbumper.Attheverylatest,stop
thevehiclewhentheredorientationline@)
bordersanobject.
Adjustingthedisplay
andthewarningtones
Appliesto:vehicleswithparkingsystemplus
Thedisplayandwarningtonescanbeadjustedin
theInfotainment.

MENU >SelectintheInfotainmentsystem:but-
ton>Vehicle> leftcontrolbutton>Driveras-
sistance>Parkingaid.

Signaltones
Frontvolume-volumeforthefrontarea
Rearvolume-volumeforthereararea
Entertainmentfader-whentheparkingsystem
isturnedon,thevolumeoftheaudio/video
sourceislowered
G)Tips
—Thesettings areautomaticallystoredand
assignedtotheremotecontrolkeythatisin
use.
— Thenewlevelisdemonstratedbriefly*when
thevolumeisadjusted.
Errormessages
Appliesto:vehicleswithrearparkingsystem/parkingsystem
plus
Rearparkingaid:malfunction!Obstaclescannot
bedetected
Parkingaid:malfunction!Obstaclescannotbe
detected
ThereisasystemmalfunctioniftheLEDinthe
Psbuttonblinkswhenswitchingonthe system.
Iftheerrorisnotcorrectedbeforeyouswitchoff
theignition,theLEDinthePbuttonwillblink
thenexttimeyouswitchontheparkingsystem
byshifting intoreverse.Aslongastheerrorisac-
tive,youcandisplaytheerrormessagesinthe
secondtabofthedriverinformationsystem.>

IntelligentTechnology

Isthisanoffroadvehicle?
YourAudiisnot anoffroadvehicle-thereisnot
enoughgroundclearance.Forthisreason,avoid
difficultterrain.

Z\WARNING
—Also,invehicleswithallwheeldrive,adapt
yourdrivingstyletothecurrentroadand
trafficconditions.Donotlettheincreased
safetyprovidedtemptyouintotakingrisks,
becausethisincreasestheriskofanacci-
dent.
— Thebrakingabilityofyourvehicleislimited
tothetractionofthewheels.In thisway,it
isnotdifferentfromatwowheeldrivevehi-
cle.Donot betemptedtoacceleratetoa
highspeedwhentheroadisslippery,be-
causethisincreasestheriskofanaccident.
—Notethatonwetstreets,thefrontwheels
can“hydroplane’”ifdrivingatspeedsthat
aretoohigh.Unlikefrontwheeldrivevehi-
cles,theengineRPMdoesnotincreasesud-
denlywhenthevehiclebeginshydroplaning.
Forthisreason,adaptyourspeedtothe
roadconditionstoreducetheriskofanacci-
dent.

Rearspoiler
Appliesto:vehicleswithretractablerearspoiler
Theextendablerearspoilerincreasesdrivingsta-
bility.

a
g|> z
a.


Fig.89Centerconsole:buttonfortherearspoiler
Therearspoilerretractsandextends.Itcanbe
activatedinvariousoperatingmodes(manual
modeorautomaticmode).
838
Automaticmode(normaloperation)
—Automaticextension:therearspoilerwillauto-
maticallyextendwhenspeedsexceedapproxi-
mately75mph(120km/h).
—Automaticretraction:therearspoilerwillauto-
maticallyretractwhenspeedsdecreasetoun-
derapproximately50mph(80km/h).
Manualmode
—Extendingmanually:brieflytapthe>fig.89
buttontofullyextendtherearspoiler.
—Retractingmanually:whendrivingatspeeds
belowapproximately10mph(20km/h),press
andholdthebuttontoretracttherearspoiler.
Whenatspeedsbetween10mph(20km/h)
and75mph(120km/h),therearspoilerwill
completelyretractwhenyoutap thebutton.
Indicatorlights
8if8Rearspoiler:malfunction!Pleasecon-
tactService
Therearspoilermaynot haveextendedduetoa
malfunction.Thiscouldchangethevehicle'sdriv-
ingcharacteristicsathighspeeds.Donotdrive
fasterthan85mph(140km/h).Drivetoanau-
thorizedAudidealerorauthorizedAudiService
Facilityimmediatelytohavethemalfunctioncor-
rected.Thecoloroftheindicatorlightdepends
onthevehiclespeed.

ZAWARNING
Drivingathigherspeedswithouttherear
spoilerdeployedcanimpairhandlingcharac-
teristics,makingthevehiclehardertocontrol.
—Alwaysmakesurethatthespoilerisde-
ployedwhendrivingatspeedsover85mph
(140km/h).Iftherearspoilerwarning/indi-
catorlightintheinstrumentclustercomes
on,therearspoilermaynot havedeployed.
—Neverdriveatspeedshigherthan85mph
(140km/h)ifthespoilerisnotdeployed.
Havethespoilerinspectedassoonaspossi-
blebyanauthorizedAudidealerorqualified
workshop.
—Alwaysobeyspeedlimitsandothertraffic
laws.

Voicerecognitionsystem

Voicerecognitionsystem
Operating
Appliesto:vehicleswithvoicerecognitionsystem
YoucanoperatemanyInfotainmentfunctions
convenientlybyspeaking.
Requirement:theignitionandtheMMImustbe
switched
on.Asystemlanguagesupportedby
thevoicerecognitionsystemmustbeset.There
mustbenophonecallsinprogressandthepark-
ingaidmustnotbeactive.

>Switchingon:brieflypressthe[2]button@)
=>page14,fig.10onthemultifunctionsteer-
ing
wheelandsaythedesiredcommandafter
theBeep.
>Switchingoff:pressandholdthe|™]button.
Or:saythecommandCancel.
>Pausing:saythecommandPause.Toresume,
pressthe|]button.
>Correcting:pressthe[>]buttononetime©
=>page12,fig.6.Or:saythecommandCorrec-
tion.






Inputassistance
Thesystemguidesyouthroughtheinputwith
visualandaudiofeedback.
—Visualinputassistance:afterswitchingon
voicerecognition,adisplaywithaselectionof
possiblecommandsappears.Thecommand
displaycanbe switchedon/offunder[MENU]>
Settings>leftcontrolbutton>MMIsettings>
Speechdialogsystem.
—Audioinputassistance: tohavethepossible
commandsread,pressthe[2]buttononthe
multifunctionsteeringwheelbrieflyandsay
Help.




Forthesystemtounderstandyou:
Speakclearlyanddistinctly atanormalvolume.
Speaklouderwhendrivingfaster.
Emphasizethewordsinthecommandsevenly
anddonotleavelongpauses.
Donotspeakacommandwhenthevoicerecogni-
tionsystemismakinganannouncement.
102
Closethedoors,thewindows,andthesunroof*
toreducebackgroundnoise.Makesurethatpas-
sengersarenot speakingwhenyouaregivinga
voicecommand.
Onlyusethesystemfromthedriver'sseatbe-
causethehands-freemicrophoneisdirectedto-
wardthatseat.
Additionalsettings
See>page174,Voicerecognitionsystem.

ZAWARNING
—Directyourfullattentiontodriving.Asthe
driver,youhavecompleteresponsibilityfor
safetyintraffic.Onlyuse thefunctionsin
suchawaythatyoualwaysmaintaincom-
pletecontroloveryourvehicleinalltraffic
situations.
—Donotuse thevoicerecognitionsystemin
emergenciesbecauseyourvoicemaychange
instressfulsituations.Thesystemmaytake
longertodialthenumberormaynotbe
abletodialitatall.Dialtheemergency
numbermanually.

G)Tips
— Thedialogpauseswhenthereisanincom-
ingphonecallandwillcontinueifyouig-
norethecall.Thedialogendsifyouanswer
thecall.
—Therearenovoiceguidance*promptswhen
adialogisactive.
—Youcanselectan iteminthelistusingei-
therthevoicerecognitionsystemorthe
controlknob.
Commandoverview
information
Appliesto:vehicleswithvoicerecognitionsystem
Thefollowingoverviewsdescribethecommands
thatcan beusedtooperatetheMMIusingthe
voicerecognitionsystem.
Alternativecommandsareseparatedusinga“/”,
forexamplesay:Telephone/(or)Navigation/
(or)Radio.

8S1012721BA
Airbagsystem

systemwillnot beimpairedandthatdiscarded
componentsdonotcauseinjuryorpollutethe
environment.


ZAWARNING
Impropercare,servicingandrepairproce-
durescanincreasetheriskofpersonalinjury
anddeathbypreventinganairbagfromde-
ployingwhenneededordeployinganairbag
unexpectedly:
—Nevercover,obstruct,orchangethesteer-
ingwheelhornpadorairbagcoverorthein-
strumentpanelormodifytheminanyway.
—Neverattachanyobjectssuchascupholders
ortelephonemountingstothesurfacescov-
eringtheairbagunits.
—Forcleaningthehornpadorinstrument
panel,useonlyasoft,dryclothoronemois-
tenedwithplainwater.Solventsorcleaners
coulddamagetheairbagcoverorchange
thestiffnessorstrengthofthematerial so
that
theairbagcannotdeployandprotect
properly.
—Neverrepair,adjust,orchangeanypartsof
theairbagsystem.
—Allworkonthesteeringwheel,instrument
panel,front seatsorelectricalsystem(in-
cludingtheinstallationofaudioequipment,
cellulartelephonesandCBradios,etc.)
mustbeperformedbyaqualifiedtechnician
whohasthetraining andspecialequipment
necessary.
—Foranyworkontheairbagsystem,we
stronglyrecommendthatyouseeyourau-
thorizedAudidealerorqualifiedworkshop.
—Nevermodifythefrontbumperorpartsof
thevehiclebody.
—Alwaysmakesurethatthesideairbagcan
inflatewithoutinterference:
—Neverinstallseatcoversorreplacement
upholsteryoverthefrontseatbacksthat
havenotbeenspecificallyapprovedbyAu-
di.
—Neveruseadditionalseatcushionsthat
covertheareaswherethesideairbagsin-
flate.
—Damagetotheoriginalseatcoversor to

theseamintheareaofthesideairbag
modulemustalwaysberepairedimmedi-
atelyby anauthorizedAudidealer.
— Theairbagsystemcandeployonlyonce.Af-
teranairbaghasbeendeployed,it mustbe
replacedwithnewreplacementpartsde-
signedandapprovedespeciallyforyourAudi
model
version.Replacementofcomplete
airbagsystemsorairbagcomponentsmust
beperformedbyqualifiedworkshopsonly.
Makesurethatanyairbagserviceactionis
enteredinyourAudiWarranty&Mainte-
nancebookletunderAIRBAGREPLACEMENT
RECORD.
—Forsafetyreasonsinsevereaccidents,the
alternatorandstarterareseparatedfrom
thevehiclebatterywithapyrotechniccircuit
interrupter.
—Workonthepyrotechniccircuitinterrupter
mustonlybeperformedbyaqualified
technicianswhohavetheexperience,in-
formationandspecialtoolsnecessaryto
performtheworksafely.
—Ifthevehicleorthecircuitinterrupteris
scrapped,allapplicablesafetyprecautions
mustbefollowed.



OtherthingsthatcanaffectAdvanced
Airbagperformance
Changingthevehicle'ssuspensionsystemcan
changethewaythattheAdvancedAirbagSystem
performsinacrash.Forexample,usingtire-rim
combinationsnotapprovedbyAudi,loweringthe
vehicle,changingthestiffnessofthesuspension,
includingthesprings,suspensionstruts,shock
absorbersetc.canchangetheforcesthatare
measuredbytheairbagsensorsandsenttothe
electroniccontrolunit.Somesuspensionchanges
can,forexample,increasetheforcelevelsmeas-
uredbythesensorsandmaketheairbagsystem
deployincrashesinwhichitwouldnotdeployif
thechangeshadnotbeenmade.Otherkindsof
changesmayreducetheforcelevelsmeasuredby
thesensorsandpreventtheairbagfromdeploy-
ingwhenitshould.>
203

Airbagsystem


ZA\WARNING
Changingthevehicle'ssuspensionincluding
useof unapprovedtire-rimcombinationscan
changeAdvancedAirbagperformanceandin-
creasetheriskofseriouspersonalinjuryina
crash.
—Neverinstallsuspensioncomponentsthat
donothavethesameperformancecharac-
teristicsasthecomponentsoriginallyinstal-
ledonyourvehicle.
—Neverusetire-rimcombinationsthathave
notbeenapprovedbyAudi.


Kneeairbags
Descriptionofkneeairbags
Thekneeairbagsystemcanprovidesupplemen-
talprotectiontoproperlyrestrained frontseat
occupants.

BFV-0186



Fig.156Driver'skneeairbag
Thedriverkneeairbagisintheinstrumentpanel
underneaththesteeringwheel>fig.156,the
airbagforthepassengerisataboutthesame
heightintheinstrumentpanelunderneaththe
glovecompartment.
Thekneeairbagoffersadditionalprotectionto
thedriver'sandpassenger'skneesandupperand
lowerthigh areasandsupplementstheprotec-
tionprovidedbythesafetybelts.
Ifthefrontairbagsdeploy,thekneeairbagsalso
deployinfrontalcollisionswhenthedeployment
thresholdstoredinthecontrolunitismet
=page197,Moreimportantthingstoknow
aboutfrontairbags.
204

Inadditiontotheirnormalsafetyfunction,safe-
tybeltshelpkeepthedriverorfrontpassengerin
positioninafrontalcollisionso thattheairbags
canprovidesupplementalprotection.
Theairbagsystemisnotasubstituteforyour
safetybelt.Rather,itispartoftheoveralloccu-
pantrestraintsysteminyourvehicle.Alwaysre-
memberthattheairbagsystemcanonlyhelpto
protectyouifyouarewearingyoursafetybelt
andwearingitproperly.Thisiswhyyoushouldal-
wayswearyoursafetybelt,notjustbecausethe
law
requiresyoutodoso>page180,General
notes.
Remembertoo,airbagswilldeployonlyonceand
onlyincertainkindsofaccidents-yoursafety
beltsarealwaystheretoofferprotectioninthose
accidentsinwhichairbagsarenotsupposedto
deployorwhenthey havealreadydeployed,for
examplewhenyourvehiclestrikesorisstruckby
anotherafterthefirstcollision.
Thisisjustoneofthereasonswhyanairbagis
notasubstituteforthesafetybelt.Theairbag
systemworksmosteffectivelywhenusedwith
thesafetybelts.Therefore,alwayswearyour
safetybeltscorrectly.
Itisimportanttorememberthatwhilethesup-
plementalkneeairbagsystemisdesignedtore-
ducethelikelihoodof seriousinjuries,otherinju-
ries,forexample,swelling,bruisingand minor
abrasionsandfrictionburnscanalsooccurwhen
anairbaginflates.
Thekneeairbagsystembasicallyconsistsof:
—Theelectroniccontrolmodule
—Twoinflatableairbags(airbagandgasgenera-
tor),oneforthedriverandoneforthefront
passenger
—Theairbagwarninglightintheinstrumentclus-
ter
Thekneeairbagsystemwillnotdeploy:
—whentheignitionisswitchedoff
—infrontalcollisionswhenthedeceleration
measuredbythecontrolunitistoolow
—insidecollisions
—inrear-endcollisions

Childsafety


rearseatingpositionandhavetheairbag
systeminspectedbyyourauthorizedAudi
dealer.
—Alwaysbucklethechildseatfirmlyinplace
evenifa childisnotsittinginit.Aloose
childseatcanflyaroundduringasudden
stoporinacollision.
—AlwaysreadandheedallWARNINGS
wheneverusinga childrestraintinavehi-
cle>page180,Safetybelts,>page188,
Airbagsystemand=page212,Important
information.
@)Tips
Alwaysreplacechildrestraintsthatwerein-
stalledinavehicleduringacrash.Damageto
a childrestraintthatisnotvisiblecouldcause
ittofail inanothercollisionsituation.
ONETeteReeerenealCle)
Yourvehicleisequippedwithafront“Advanced
AirbagSystem”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.
EventhoughyourvehicleisequippedwithanAd-
vancedAirbagsystem,allchildren,especially
those12yearsandyounger,shouldalwaysridein
thebackseatproperlyrestrainedfortheirage
andsize.Theairbagonthepassengersidemakes
214
thefrontseatapotentiallydangerousplacefora
child
toride.Thefrontseatisnot thesafestplace
forachildinaforward-facingchildsafetyseat.It
canbeaverydangerousplaceforaninfantora
largerchildinarearward-facingseat.
Thevehicle'sAdvancedAirbagSystemhasaca-
pacitivepassengerdetectionsysteminthefront
passengerseatcushionthatcandetectthepres-
enceofababyorachildinachildrestraintsys-
temonthisseat.
Thecapacitivepassengerdetectionsystemregis-
tersthechangesthatresultinanelectricalfield
whenachild,achildrestraint,andababyblanket
areonthefrontpassengerseat.The changein
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.
CeCMeeewealiasle)
system
Regardlessofthechildrestraintthatyouuse,
makesurethatithasbeencertifiedtomeetSafe-
tyStandardsandhasbeencertifiedbyitsmanu-
facturerforusewithanairbag.Alwaysbesure
thatthechildrestraintisproperlyinstalledat
oneoftherearseatingpositions.Ifinexception-
alcircumstancesyoumustuseitonthefront
passengerseat,carefullyreadalloftheinforma-
tiononchildsafetyandAdvancedAirbagsand>

8S1012721BA
Wheels

beadsarelaidatsubstantially
90degreestothecenterlineof
thetread.
Recommendedinflation
pressure
see>page251,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
onpage249.Youmaynotfind
thisinformationonalltiresbe-
causeitisnotrequiredbylaw.
Thespeedratinglettercode,
whereapplicable,ismoldedon
thetiresidewallandindicatesthe
maximumpermissibleroad
speeds.Seealso> AinGeneral
informationonpage248.
Tirepressuremonitoring
system*
meansasystemthatdetects
whenoneormoreofavehicle's
tiresareunderinflatedandillumi-
natesalowtirepressurewarning
telltale.
Tread
meansthatportionofatirethat
comesintocontactwiththeroad.>
253