2019 AUDI TT COUPE width

Assistsystems

areindicatedby thetimetheyenteryour“blind
spot”,
atthelatest.
@®Vehiclesyouarepassing
Ifyouslowlypassavehiclethatsideassisthas
detected(thedifferenceinspeedbetweentheve-
hicleandyourvehicleislessthan9mph(15km/
h)),thedisplayintheexteriormirrorturnsonas
soonasthevehicleentersyourblindspot.
Thedisplaywillnotturnonifyouquicklypassa
vehiclethatsideassisthasdetected(thediffer-
enceinspeedisgreaterthan9mph(15km/h)).
Functionallimitations
Theradarsensorsaredesignedtodetecttheleft
andrightadjacentlaneswhentheroadlanesare
thenormalwidth.Insomesituations,thedisplay
intheexteriormirrormayturnoneventhough
thereisnovehiclelocatedintheareathatiscriti-
calforalanechange.Forexample:
—Ifthelanes arenarroworifyouaredrivingon
theedgeofyourlane.Ifthisisthecase,the
systemmayhavedetectedavehicleinanother
lanethatisnotadjacenttoyourcurrentlane.
—Ifyouaredrivingthroughacurve.Sideassist
mayreacttoavehiclethatisonelaneoverfrom
theadjacentlane.
—Ifsideassistreactstootherobjects(suchas
highordisplacedguardrails).
—Inpoorweatherconditions.Thesideassist
functionsarelimited.
Donotcovertheradarsensors>fig.77with
stickers,deposits,bicyclewheelsorotherob-
jects,becausetheywillimpairthefunction.For
informationoncleaning,see>page270.

ZAWARNING
—Alwayspayattentiontotrafficandtothe
areaaroundyourvehicle.Sideassistcannot
replaceadriver'sattention.Thedriveralone
isalwaysresponsibleforlanechangesand
similardrivingmaneuvers.
—Insomesituations,thesystemmaynot
functionoritsfunctionmaybelimited.For
example:

74

—Ifvehiclesareapproachingorbeingleft
behindveryquickly.Thedisplaymaynot
turnonintime.
—Inpoorweatherconditionssuchasheavy
rain,snoworheavymist.
—Onverywidelanes,intightcurves,orif
thereisariseintheroadsurface.Vehicles
intheadjacentlanemaynot be detected
becausetheyareoutsideofthesensor
range.
()Note
Thesensorscanbedisplacedbyimpactsor
damagetothebumper,wheelhousingand
underbody.Thiscan impair thesystem.Have
anauthorizedAudidealerorauthorizedAudi
ServiceFacilitychecktheirfunction.
@Tips
—Ifthewindowglassinthedriver'sdooror
front
passenger'sdoorhasbeentinted,the
displayintheexteriormirrormaybeincor-
rect.

—Foranexplanationonconformitywiththe
FCCregulationsinthe UnitedStatesandthe
IndustryCanadaregulations,see
=>page291.
SyiememeRela
Appliesto:vehicleswithAudisideassist

>SelectintheInfotainmentsystem:[MENU]but-
ton>Vehicle> leftcontrolbutton>Driveras-
sistance>Audisideassist

Ifthesystemisactivated,thedisplaysintheex-
teriormirrorswillturnonbrieflywhentheigni-
tionisswitchedon.
Adjustingthedisplaybrightness
Appliesto:vehicleswith Audisideassist
ThedisplaybrightnesscanbeadjustedintheIn-
fotainmentsystem.

>SelectintheInfotainmentsystem:[MENU]but-
ton>Vehicle> leftcontrolbutton>Driveras-
sistance>Audisideassist

8S1012721BA
Wheels

Tiredesignations

B8K-2316


Fig.189Tiredesignationontheside-
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
page248.
“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”.
249

8S1012721BA
Wheels

windows,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.
GrossAxleWeightRating
(“GAWR”)
meanstheload-carryingcapacity
ofasingleaxlesystem,measured
atthetire-groundinterfaces.
GrossVehicleWeightRating
(“GVWR”)
meansthemaximumtotalloaded
weightofthevehicle.
Groove
meansthespacebetweentwoad-
jacenttreadribs.
251
>

Wheels

Loadrating(code)
meansthemaximumloadthata
tireisratedto carryforagivenin-
flationpressure.Youmaynotfind
thisinformationonalltiresbe-
causeitisnotrequiredbylaw.
Maximumloadrating
meanstheloadratingforatireat
themaximumpermissibleinfla-
tionpressureforthattire.
Maximumloadedvehicle
weight
meansthesumof:
(a)Curbweight
(b)Accessoryweight
(c)Vehiclecapacityweight,and
(d)Productionoptionsweight
Maximum(permissible)
inflationpressure
meansthemaximumcoldinfla-
tionpressuretowhichatiremay
beinflated.Alsocalled“maxi-
muminflationpressure.”
Normaloccupantweight
means150lbs(68kg)timesthe
numberofoccupantsseatedin
thevehicleuptothetotalseating
capacityofyourvehicle.
252
Occupantdistribution
meansdistributionofoccupants
inavehicle.
Outerdiameter
meanstheoveralldiameterofan
inflatednewtire.
Overallwidth
meansthelineardistancebe-
tweentheexteriorsoftheside-
wallsofaninflatedtire,including
elevationsduetolabeling,deco-
rations,orprotectivebandsor
ribs.
Ply
meansalayerofrubber-coated
parallelcords.
Productionoptionsweight
meansthecombinedweightof
thoseinstalledregularproduction
optionsweighingover5lbs
(2.3kg)inexcessofthosestand-
arditemswhichtheyreplace,not
previouslyconsideredincurb
weightoraccessoryweight,in-
cludingheavy dutybrakes,ride
levelers,roofrack,heavyduty
battery,andspecialtrim.
Radialplytire
meansapneumatictireinwhich
theplycordsthatextendtothe>

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

8S1012721BA
Wheels

Wheelboltsandrims
Wheelbolts
Wheelboltsmustbecleanandloosen/tighten
easily.
Rims
Rimswithaboltedrimring*orwithboltedwheel
covers*consistofmultiplepieces.Thesecompo-
nentswereboltedtogetherusingspecialbolts
andaspecialprocedure.Youmustnotrepairor
disassemblethem>A.

Z\WARNING
Wheelboltsthataretightenedorrepairedin-
correctlycanbecomelooseandresultinloss
ofvehiclecontrol,whichincreasestheriskof
anaccident.Forthecorrecttighteningspecifi-
cation,see>page282,Finishing.
—Alwayskeepthewheelboltsandthethreads
inthewheelhubcleanandfreeofgrease.
—Onlyusewheelboltsthatfittherim.
—Alwayshavedamagedrimsrepairedby an
authorizedAudidealerorauthorizedAudi
ServiceFacility.Neverrepairordisassemble
rimsyourself,becausethisincreasestherisk
ofanaccident.
Wintertiressignificantlyimprovethevehicle's
handlingwhendrivinginwinterconditions.Be-
causeoftheirconstruction(width,compound,
treadpattern),summertiresprovidelesstraction
oniceandsnow.

>Usewintertiresonallfourwheels.
>Onlyusewintertiresthatareapprovedforyour
vehicle.
>Pleasenotethatthemaximumpermitted
speedmaybelowerwithwintertires>A\in
Generalinformationonpage248.Anauthor-
izedAudidealerorauthorizedAudiServiceFa-
cilitycan informyouaboutthemaximumper-
mittedspeedforyourtires.
»Checkthetirepressureafterinstallingwheels
=>page258.
Theeffectiveness ofwintertiresisreducedgreat-
lywhenthetreadisworndowntoadepthof
0.157in(4mm).Thecharacteristicsofwinter
tiresalsodecreasegreatly asthetireages,re-
gardlessoftheremainingtread.
@)Forthesakeoftheenvironment
Reinstallsummertiresattheappropriate
time,becausetheyprovidebetterhandling
whenroadsarefreeofsnowandice.Summer
tirescauselessroadnoise,tirewear,andfuel
consumption.
@)Tips
Youcanalsouseallseasontiresinsteadof
wintertires.Pleasenotethatinsomecoun-
trieswherewintertiresarerequired,onlywin-
tertireswiththe4symbolmaybepermit-
ted.
Snowchainsimprovebothdrivingandbrakingin
winterroadconditions.
>Onlyinstallsnowchainsonthefrontwheels.
>Checkandcorrecttheseatingofthesnow
chainsafterdrivingafewfeet,ifnecessary.Fol-
lowtheinstructionsfromthemanufacturer.
>Notethemaximumspeedof30mph
(50km/h).Observethelocalregulations.
Useofsnowchainsisonlypermittedwithcertain
rim/tirecombinationsduetotechnicalreasons.
CheckwithanauthorizedAudidealerorauthor-
izedAudiServiceFacilitytoseeifyoumayuse
snowchains.
Youmustremovethesnowchainsonroadswith-
outsnow.Otherwise,youcouldimpairdriving
abilityanddamagethetires.

ZA\WARNING
Usingincorrectsnowchainsorinstallingsnow
chainsincorrectlycanresultinlossofvehicle
control,whichincreasestheriskofanacci-
dent.>

263

—Snowchainscandamagetherimsand
wheelcovers*ifthechainscomeintodirect
contactwiththem.Removethewheelcov-
ers*first.Usecoatedsnowchains.
—Usingsnowchainsthataddmorethan 0.53
in(13.5mm)ofheight canseverelydamage
thewheelhousingsandothervehiclecom-
ponents.
G)Tips
Whenusingsnowchains,itmaybeadvisable
tolimittheESC>page85.
eecined
Appliesto:vehicleswithlow-profiletires
Comparedtoothertire/rimcombinations,low-
profiletiresofferawidertreadsurfaceanda
largerrimdiameterwithshortertiresidewalls.
Thisresultsinanagiledrivingstyle.However,it
mayreducethelevelofcomfortandincrease
roadnoise whendrivingonroadsinpoorcondi-
tion.
Low-profiletirescanbecomedamagedmore
quicklythanstandardtireswhendrivingover
largebumps,potholes,manholecovers,and
curbs.Therefore,itisparticularlyimportantto
maintainthecorrecttirepressure>page258.
Toreducetheriskofdamagetothetiresand
rims,driveverycarefullyonpoorroads.
Checkyourwheelsregularlyevery2,000mi
(3,000km)fordamage.Forexample,checkfor
bulges/cracksonthetiresordeformations/cracks
ontherims.
Afteraheavyimpactordamage,havethetires
andrimsinspectedorreplacedimmediatelyby
anauthorizedAudidealerorauthorizedAudi
ServiceFacility.
Low-profiletirescanwearoutfasterthanstand-
ardtires.
Uniformtirequalitygrading
—Treadwear
—TractionAAABC
264
—TemperatureABC
Qualitygradescanbefoundwhereapplicableon
thetiresidewallbetweentreadshoulderand
maximumsectionwidth>page249,fig.189.
Forexample:Treadwear200,TractionAA,Tem-
peratureA.
AllpassengercartiresmustconformtoFederal
SafetyRequirementsinadditiontothesegrades.
Treadwear
Thetreadweargradeisacomparativerating
basedonthewearrateofthetirewhentested
undercontrolledconditionsonaspecifiedgov-
ernmenttestcourse.
Forexample,atiregraded150wouldwearone
andonehalf(11/2)timesaswellonthegovern-
mentcourseasa tiregraded100.
Therelativeperformanceoftiresdependsupon
theactualconditionsoftheiruse,however,and
maydepartsignificantlyfromthenormdueto
variationsindrivinghabits,servicepracticesand
differencesinroadcharacteristicsandclimate.
Traction
Thetractiongrades,fromhighestto lowest, are
AA,A,BandC.Thosegradesrepresentthetire's
abilitytostoponwetpavementasmeasuredun-
dercontrolledconditionsonspecifiedgovern-
menttestsurfacesofasphaltandconcrete.Atire
markedCmayhavepoortractionperformance
>A.
Temperature
ThetemperaturegradesareA(thehighest),B,
andC,representingthetire'sresistancetothe
generationofheatanditsabilitytodissipate
heatwhentestedundercontrolledconditionson
aspecifiedindoorlaboratorytestwheel.
Sustainedhightemperaturecancausethemate-
rialofthetiretodegenerateandreducetirelife,
andexcessivetemperaturecanleadtosudden
tirefailure>A\.
ThegradeCcorrespondstoalevelofperform-
ance
whichallpassengercartiresmustmeetun-
der theFederalMotorVehicleSafetyStandard>