suspension AUDI Q5 2019 Owners Manual

Quickaccess

Indicatorlightsoverview
Theindicatorlightsintheinstrumentcluster
blinkorturnon.Theyindicatefunctionsormal-
functions.
Messagesmayappearwithsomeindicatorlights.
Awarningsignalwillsoundatthesametime.
Theindicatorlightsandmessagesmaybecov-
ered byotherdisplays.Toshow themagain,se-
lectthesecondtabformessageswiththemulti-
functionsteeringwheel>page15or
=>page18.
Someindicatorlightsinthedisplaycandisplayin
severalcolors.

MMeTeelemlis
Ifthewaorindicatorlightturnson,check
themessageintheinstrumentcluster.
OTA]
Someindicatorlightsturnonbrieflyasafunction
checkwhenyouswitchtheignitionon.Thesesys-
temsaremarkedwithaVinthefollowingtables.
Ifoneoftheseindicatorlightsdoesnotturnon,
thereisamalfunctioninthatsystem.
Yourvehiclehaseitheramonochromedisplayor
amulticoloreddisplay,dependingonvehicle
equipment.Someindicatorlightsappearwhite
onamonochromedisplay.TheBoWcentral
indicatorlightturnsonatthesametimetoindi-
catethepriorityoftheseindicatorlights.
Thefollowingindicatorlightsmaybeavailable,
dependingonthevehicleequipment:

Redindicatorlights
Centralindicatorlight
=>page10,
Audipresense
=page111
Brakesystem¥
=>page21
Brakesystem¥
=>page21
10

Electromechanicalparkingbrake
=>page 22
Electromechanicalparkingbrake
=>page22
Coolingsystem
=>page 22
Engineoilpressure
=>page314
Engineoillevel(MIN)
>page315
Electricalsystem
=>page320
Safetybelt
=>page23
Electromechanicalsteering
=>page147
Steeringlock
=>page23
Enginestartsystem
=>page23
Transmission
=>page87
Hood
=>page23
Adaptivecruisecontrol¥
=>page103
Trafficjamassist
=>page108
Airsuspension
=>page24
Drivesystem
=>page24


Yellowindicatorlights
Centralindicatorlight
=>page 10
ElectronicStabilizationControl
(ESC)
>page23
ElectronicStabilizationControl
(ESC)¥
=>page23

80A012721BG

Quickaccess

ElectronicStabilizationControl
(ESC)
=>page145
Keys
=>page75
Driver'sdoor
Brakesystem=>page25
=>page21
Anti-lockbrakingsystem(ABS)Y
=>page23
Anti-lockbrakingsystem(ABS)¥
=>page23
Batteryinvehiclekey
=>page30
Bulbfailureindicator
=>page25
Headlightrangecontrolsystem
Safetysystems¥>page25
=>page22Adaptivelight
Brakepads=page25
>page21Light/rainsensor
Electromechanicalparkingbrake=>page26
=>page22Activelaneassist
Tirepressure>page117
=>page341Audisideassist
Tirepressurepage125
=>page341Audipresense
Drivesystempage115
=>page24/Parkingaid
MalfunctionIndicatorLamp(MIL)=>page142
v
>page311
Transmission
=>page87Enailimitati
nginespeedlimitationSreeringlock
>24
page=>page23
Engineoillevel(MIN);
Enginestartsystem
>page315
=>page 23
Engiillevel(MAX:
PSEICEL:Electromechanicalsteering
=>page315
=>page147
Engineoilsensor
=>page315Airsuspension
=>page24
Enginewarm-uprequest
iL
=>page315Suspensioncontro
=>page26
Electricalsystem
page320Allwheeldrive/sportdifferential
=>page26
Tanksystem
eeEmergencycallfunction


>
pees=>page202
Washerfluidlevel
=>page25Otherindicatorlights

WindshieldwipersTurnsignals
=>page25=page26>
11

Quickaccess


12
Trailerturnsignals
=>page26
Cruise controlsystem
=>page93
Cruisecontrolsystem
=>page93
Adaptivecruisecontrol
=>page103
Adaptivecruisecontrol
=>page103
Adaptivecruisecontrol
=>page103
Adaptivecruisecontrol
=>page103
Adaptivecruisecontrol
=>page105,>page100
Adaptivecruisecontrol
=>page100
Trafficjamassist
=>page108
Activelaneassist
=>page117
Predictiveefficiencyassist
=>page99
Predictiveefficiencyassist
=>page99
Predictiveefficiencyassist
=>page99
Predictiveefficiencyassist
=>page99
Predictiveefficiencyassist
=>page99
Predictiveefficiencyassist
=>page99
Hilldescentassist
=>page146
Start/Stopsystem
=>page77
Start/Stopsystem
=>page77
Keys
=>page76























Parkassist
=>page140
Transmission
=>page87
Dynamicsteering
=>page147
Airsuspension
=>page24
Adaptivecruisecontrol
=>page105,
Trafficjamassist
=>page109
Trafficjamassist
=>page109
Audipresense
>page115
Electromechanicalparkingbrake
=>page22
Electromechanicalparkingbrake
=>page22
Hilldescentassist
=>page146
Childsafetylock
=>page39
Speedwarningsystem
=>page93
Speedwarningsystem
=>page93
Activelaneassist
>page117
Audisideassist
=>page125
Camera-basedtrafficsignrecogni-
tion
=>page96
Highbeams
=>page45
Highbeamassistant
=>page45
Highbeamassistant
=>page45

Instrumentcluster

DrivetoanauthorizedAudidealerorauthorized
AudiServiceFacilityimmediatelytohavethe
malfunctioncorrected.
@®Tips
ForadditionalinformationonESCandABS,
see>page144.
BDrivesystem:malfunction!Safelystopvehi-
cle
Thereisamalfunctioninthedrivesystem.The
brakeboosterandthepowersteeringmaystop
working.
Stopthevehicleimmediatelyor assoon
aspossibleand donotcontinuedriving.Havethe
problemcorrectedby anauthorizedAudidealer
orauthorizedAudiServiceFacility.
BDrivesystem:malfunction!Pleasecontact
Service
Thereisamalfunctioninthedrivesystem.Drive
slowlytoanauthorizedAudidealerorauthorized
AudiServiceFacilitytohave the malfunctioncor-
rected.

!~Enginespeedlimitation
IftheBAindicatorlightturnson,theenginewill
beautomaticallylimitedtotheRPMdisplayedin
theinstrumentcluster.Thisprotectstheengine
fromoverheating.
Theenginespeedlimitationdeactivatesoncethe
engineisnolongerinthecriticaltemperature
rangeandyouhavereleasedtheacceleratorped-
alonce.
Iftheenginespeedlimitationwasactivatedby
anenginecontrolmalfunction,theBindicator
lightalsoturnson.Makesuretheenginespeed
doesnotgoabovethespeeddisplayed,forexam-
plewhendownshifting.Drivetoanauthorized
AudidealerorauthorizedAudiServiceFacilityim-
mediatelytohavethemalfunctioncorrected.
24
<>Airsuspension
Appliesto:vehicleswithairsuspension
EBAirsuspension:servicemode.Vehiclecanbe
movedbuthandlingmaybe impaired
Servicemodeisactivated.Carefullydrivetoan
authorizedAudidealerorauthorizedAudiService
Facilityimmediatelytohave theservicemodede-
activated.
BAirsuspension:malfunction!Youmaycon-
tinuedrivingslowlyatmax.XXmph(km/h)
Thereisamalfunction.Drivingstabilitymaybe
limited.DrivetoanauthorizedAudidealerorau-
thorizedAudiServiceFacilityimmediately.Donot
drivefasterthanthespeedgiveninthemessage.
BAirsuspension:malfunction!Youcancontin-
uedrivingslowly.Speedlimitedtomax.XX
mi/h(km/h)
Thereisamalfunction.Drivingstabilitymaybe
limited.DrivetoanauthorizedAudidealeror au-
thorizedAudiServiceFacilityimmediately.The
maximumspeedhasbeenlimited.
EBAirsuspension:vehicletoolow.Limited
groundclearance
Thevehiclegroundclearanceisverylow.Waitun-
tiltheairsuspensionsystemhasrestorednormal
groundclearance.HaveanauthorizedAudidealer
orauthorizedAudiServiceFacilityrepairthe mal-
functionimmediatelyiftheindicatorlightdoes
notturnoffafterasignificantperiodoftime.
BBAirsuspension:malfunction!Pleasecontact
Service
Thereisamalfunction.Thedrivingstabilitymay
belimitedandthegroundclearancemaybelow.
SeeanauthorizedAudidealerorauthorizedAudi
ServiceFacilityforassistance.
fFTanksystem
laPleaserefuel
Iftheindicatorlightturnsonforthefirsttime
andthemessageappears,thereareabout2.1
gallons(8liters)offuelleftinthetank.
lyPleaserefuelimmediately

Instrumentcluster

mReAels
aAutomaticheadlights:malfunction!See
owner'smanual
BSAutomaticwipers:malfunction!Seeowner's
manual
Thelight/rainsensorismalfunctioning.
Thelowbeamsremainswitchedonatalltimes
forsafetyreasonswhenthelightswitchisinthe
AUTOposition.However,youcancontinueto
turnthelightsonandoffusingthelightswitch.
Youcanstillcontrolallfunctionsthatareinde-
pendentoftherainsensorthroughthewind-
shieldwiperlever.
DriveimmediatelytoanauthorizedAudidealer
orauthorizedAudiServiceFacilitytohavethe
malfunctionrepaired.
teyeerare)
Appliesto:vehicleswithsuspensioncontrol
|¢|Suspension:malfunction!Youmaycontinue
driving
Thereisamalfunction.SeeanauthorizedAudi
dealerorauthorizedAudiServiceFacilityforas-
sistance.
TeteleYedSolemlaced
Appliesto:vehicleswithallwheeldrive/sportdifferential
t3]All-wheeldrive:malfunction!Youmaycon-
tinuedriving.PleasecontactService
T-3|Sportdifferential:malfunction!Pleasecon-
tactService
DriveimmediatelytoanauthorizedAudidealer
orauthorizedAudiServiceFacilitytohavethe
malfunctionrepaired.
3]All-wheeldriveoverheating. Pleaseadapt
drivingstyle.Seeowner'smanual
3]Sportdifferential:temperaturetoohigh.
Pleaseadaptdrivingstyle
Thetransmissiontemperaturehasincreasedsig-
nificantlyduetothesportydrivingmanner.Drive
inalesssportymanneruntilthetemperaturere-
26
turnstothenormalrangeandtheindicatorlight
switchesof.

ZXWARNING
ContactanauthorizedAudidealerorauthor-
izedAudiServiceFacilityiftheallwheeldrive/
sportdifferentialisfaultyormalfunctioning.
Therepairmustbeperformedbytrainedper-
sonnelusingthecorrectoilinordertoensure
safety.
eraeel
IftheaorBindicatorlightblinks,aturnsig-
nalisturnedon.Ifbothindicatorlightsareblink-
ing,theemergencyflashersareon.

Ifanindicatorlightblinkstwiceasfast asusual,
aturnsignalbulbhasfailed.Carefullydrivetoan
authorizedAudidealerorauthorizedAudiService
Facilityimmediatelytohave the malfunctioncor-
rected.
eCCmesel
Appliesto:vehicleswithtrailerhitch
Theturnsignalsareactivatedintrailermodeif
the&indicatorlightblinks.
If aturnsignalonthetraileroronthevehicle
failswhileintrailermode,theindicatorlightwill
notblinktwiceasfasttoindicatethis.

80A012721BG
Stowingandusing

Appliesto:vehicleswithairsuspension

Fig.68Leftsideoftheluggagecompartment:rearlower-
ingbutton
Therearofthevehiclecanbeloweredtomake
loadingandunloadingeasier.Requirement:all
vehicledoorsmustbeclosed.Thetrailermode
forairsuspensionisswitchedoff.
>Opentheluggagecompartmentlid.
>Pressthelowersectionofthebutton@).The
rearofthevehiclelowers.
>
Presstheuppersectionofthe button(2).The
rearofthevehiclewillLift.
TheLEDinthebuttonwillturnonwhilethevehi-
cleislowering.Whentheloadinglevelhasbeen
reached,theLEDwillstayonaslongastherear
ofthevehicleisintheloweredposition.TheLED
turnsoffwhenthevehiclereturnstotheoriginal
level.
Therearofthevehiclewillautomaticallylift
whenyouselectanothermodeorwhenthevehi-
clespeedexceedsapproximately2mph
(2km/h).
—Donotparkthevehicleinaloweredloading
level.
—Beforetherearloweringends,makesure
thereisenoughclearanceabovethevehicle
andtheluggagecompartmentLid,ifit is
open.
—Thevehiclewillnot lowerwhentheignition
isswitchedoffifthecompressedairreser- voir
isempty.ThebuttonLEDblinksthree
times.
—Ifthecompressedairreservoirisempty,itis
refilledwhiledrivingatspeedsabove
25mph(40km/h).
Meeeeb4lmaRMaes
Appliesto:vehicleswithfoldingbackrests
BFY-0059


(example)
Therearseatbackrestscan befoldedforwardei-
therseparately*ortogether.
Follow thesafetyprecautions>page61.
63

80A012721BG
Driving

Driving
Generalinformation
Anewvehiclemustbebrokeninwithinthefirst
1,000miles(1,500km)sothatallmovingparts
worksmoothlytogether,whichhelpsto increase
theservicelifeoftheengine.
Donotdrivehigherthantwo-thirds ofthemaxi-
mumpermittedengineRPMduringthefirst600
miles(1,000km)and donotusefullaccelera-
tion.TheenginecanbeincreasedRPMgradually
duringthenext300miles(500km).
Reducingtheriskof vehicledamage
@Note
Whendrivingonpoorroads,overcurbs,and
onsteepramps,makesurethatcomponents
thathang belowthevehicle,suchasthespoil-
erandexhaustsystem,arenotstruckbecause
theycouldbedamaged.Thisespeciallyap-
pliestovehicleswithlowgroundclearance
andvehiclesthatareheavilyloaded.
Drivingthroughwateronroads
Notethefollowingtoreducetheriskofvehicle
damagewhendrivingthroughwater,forexample
onfloodedroads:
—Thewatermustnotbeanyhigherthanthebot-
tomofthevehiclebody.
—Donotdrivefasterthanwalkingspeed.

Z\WARNING
Afterdrivingthroughwaterormud,theeffec-
tivenessofthebrakesmaybereduceddueto
moistureonthebrakerotorsandbrakepads.
Afewcarefulbrakeapplicationsshoulddryoff
thebrakesandrestorethefullbrakingeffect.


@)Note
—Vehiclecomponentssuchastheengine,
transmission,suspension,orelectricalsys-
tem,canbeseverelydamagedbydriving
throughwater.
—AlwaysswitchtheStart/Stopsystem*off
whendrivingthroughwater>page77.
@)Tips
—Determinethedepthbeforedrivingthrough
water.
—Donotstopthevehicle,driveinreverse,or
switchtheengineoffwhendrivingthrough
water.
—Keepinmindthatoncomingvehiclesmay
createwavesthatraisethewaterleveland
makeittoodeepforyourvehicletodrive
throughsafely.
—Avoiddrivingthroughsaltwater,because
thiscancausecorrosion.
aieeReerietele)

driving
Theamountoffuelconsumption,theenviron-
mentalimpact,andtheweartotheengine,
brakes,andtiresdependsmostlyonyourdriving
style.Notethefollowinginformationforefficient
andenvironmentally-consciousdriving:
— Donotlettheenginerunwhilethevehicle
parked.
—UsetheStart/Stopsystem>page77.
—Turnoffelectricalequipmentthatisnotneed-
ed, forexampleseatheating*.
—Anticipateupcomingtrafficsituationswhile
drivingto avoidunnecessaryaccelerationand
braking.Usetheefficiencyassist*>page98.
—Utilizetheenginebrakingeffect.
—Avoiddrivingshortdistancesorathighspeeds
whenpossible.
—Avoidaddingextraweighttothevehicleifpos-
sible,forexamplebynotleavingroofracksor
bikeracksinstalledwhentheyarenotneeded.
—Have maintenanceperformedregularlyonthe
vehicle.
— Donotdrivewithwintertiresduring thesumm-
er.
—Makesurethetirepressureiscorrect
=>page334.
73

80A012721BG
Driving

duringadrive.Thesevaluesareresetwhenthe
ignitionisswitchedoff.
Position:displaystheheight,directionandgeo-
coordinatesofthecurrentvehicleposition.
Off:onlytheairsuspensiondisplayremainson.

Z\WARNING
—Donotexceedthe yellowrangeinthe
gauge.Yourvehiclecantip,whichincreases
theriskofanaccident.
—Undersomecircumstances,thevehiclecan
tipoverortiltsidewaysevenifthesideways
angleislow.Theangledisplaydoesnotre-
placethedriver'sattention.Toreducethe
riskofanaccident,makesurethevehicle
doesnottip,especiallywhenyouaredriving

athighspeeds.

Automatictransmission
Introduction
Theautomatictransmissioniscontrolledelec-
tronically.Thetransmissionshiftsupordownau-
tomaticallydependingonwhichdriveprogramis
selected.
Whenamoderatedrivingstyleisused,the
transmissionselectsthemosteconomicaldriving
mode.ThetransmissionupshiftsatalowerRPM
anddownshiftsatahigherRPMtoimprovefuel
efficiency.
Thetransmission switchestoasportymodeafter
akick-downorwhenthedriverusesasportydriv-
ingstylecharacterizedbyquickacceleratorpedal
movements,heavyacceleration,frequent
changesinspeed,andtravelingatthemaximum
speed.
Ifdesired,thedrivercanalsoselectthegears
manually(tiptronicmode)>page86.
Stronictransmission
TheStronicisadual-clutchtransmission.Power
istransferredusingtwoclutchesthatworkinde-
pendentlyfromoneanother.Theyreplacethe
torqueconverterusedinconventionalautomatic

transmissionsandallowthevehicletoaccelerate
withoutanoticeableinterruptionintraction.
tiptronictransmission
Inthetiptronictransmission,poweristransfer-
redbyatorqueconverter.
Selectingaselectorleverposition
|& N
cd
=ooa

Fig.90Centerconsole:selectorlever
Thecurrentselectorleverpositionisshownnext
totheselectorlever>fig.90.Thecurrentselec-
torleverpositionisalsoshownintheinstrument
clusterdisplay.
»
Youmayneedtoreleasetheselectorleverlock
dependingonwhichselectorleverpositionis
selectedandwhichoneyouwouldliketoselect.
>Todothis,pressthereleasebutton(@onthe
selectorlever>fig.90.
>Toengagethenearestselectorleverposition,
movetheselectorleverforwardorbackuntil
youfeelthefirstpressurepoint.Theselector
leverwillreturntoitsoriginalposition.
>Toshiftbeyondthenearestselectorleverposi-
tion,movetheselectorleverpastthepressure
pointintothedesiredposition.Theselectorlev-
erwillreturntoitsoriginalposition.
Forexample,youcanskipoverthe"N"positionif
youwouldliketogodirectlyfrom"D"into"R".
Selectorleverlock
Theselectorleverlockreducestheriskofselect-
ing aposition unintentionally,whichcan cause
the
vehicletoroll.Whenengagingsomeselector
leverpositions,youmustpressthereleasebut-
ton@ontheselectorleverand/orpressthe
brakepedal>fig.90.
83

80A012721BG
Trailertowing

Tongueweight
Themaximumpermittedtongueweightofthe
trailerdrawbaronthetrailerhitchballheadmust
notbeexceeded.
Havingthetongueweighttoolowaffectstheve-
hicle'shandling.Fordrivingsafety,alwaysusing
themaximumpermittedtongueweightisrecom-
mended,butnotexceedit.Distributingthecargo
inthetrailercorrectlywillhelptoachievethis
weight.
Youcandeterminethetongueweightusinga
tongueweightscale,abathroomscale,orapub-
licweighstation,forexample.
Thepermittedtongueweightofyourvehiclecan
befoundinthevehicledocumentationorin
=>page373.
Loaddistribution
Poorcargoloadanddistributioncannegatively
impactvehiclehandling.Loadthetrailerbased
onthefollowingcriteriaasmuchaspossible:
—Storeobjectsinthevehicleluggagecompart-
ment,ifpossible.Thevehicleshould always
carrytheheaviestpossibleloadandthetrailer
shouldhavethelightestpossibleload.
—Distributetheloadinthetrailersothatthe
heavyobjectsareasclosetotheaxleaspossi-
ble.
—Secureobjectssothattheydonotslide.
—Utilizethemaximumpermittedtongueweight
ifpossible.
Tires
Set thetirepressureonyourvehiclefora“full
load”;seethetirepressuresticker>page334.If
necessary,alsoadjustthetirepressureonthe
traileraccordingtothemanufacturer'sspecifica-
tions.
Thetrailerandthevehicleshould beequipped
withwintertireswhendrivinginwintertempera-
tures.
Outsidemirrors
Ifyoucannotseethetrafficbehindthetrailer
withthestandardexterior mirrors,thenyou
mustattachadditionalexterior mirrors.Adjust
themsoyouhaveasufficientvisibilitybehind
you.
Exterior lighting
Followthelegalregulationsregardingthelight-
ingequipmentonyourtrailer.Contact anauthor-
izedAudidealerorauthorizedAudiServiceFacili-
tyformoreinformation.
Beforeyoustartdriving,checkalllightingequip-
mentonthetrailerwhileitishitchedtothevehi-
cle.
Theheadlightrangecontrolautomaticallyad-
juststhelightrangeoftheheadlights.
Safety chains
Makesurethesafetychainsarecorrectlyapplied
whenpullingatrailer.Thechainsshouldhang
enoughsothatthetrailercandrivearound
curves.However,theymustnottouchthe
ground.
Airsuspension
Appliesto:vehicleswithairsuspension
The
airsuspensionmustbeatthestandardvehi-
cleheight beforeyouadjustthetongueweight
onthetrailerandhitchthetrailer9,
=>page128,Liftingandloweringthevehicle.
Forvehicleswithafactory-installedtrailerhitch,
theairsuspensiontrailermodewillautomatically
switchonifyouconnectthetrailercabletothe
socket.
Forvehicleswitharetrofittedtrailerhitch,you
mustswitchontheairsuspensiontrailermode
manually.SelectintheInfotainmentsystem:
MENU}button>Vehicle>leftcontrolbutton>
Vehiclesettings>Airsuspension:trailer.Switch
itoffagainwhenyouarenolongertowingatrail-
er.


Youcanalsoswitchofftrailermodemanually
whiledriving,forexample,whenusingabicycle
racksystem.
Ifyouhavetodrivethroughdifficultroadcondi-
tions,youcanraisethevehicleagainafterhitch-
ingthetrailerorafteradjustingthetongue
weight.
91

Trailertowing

@)Note
Appliesto:vehicleswithairsuspension
—Changesintemperatureorloadcanaffect
the heightofthevehicle.
—Ifthestandardvehicleheightisnotused,
thetongueweightspecificationisnolonger
applicable.
®Note
Attachmentsretrofittedonthevehiclemay
causedamage,especiallyonthetrailerhitch
ballhead.Incasesofdamage,havethefunc-
tioncheckedby anauthorizedAudidealeror
authorizedAudiServiceFacility.
G)Tips
—Blockthewheelswithchockswhenparking
oninclinesifthetrailerisloaded.
—Havingthevehicleinspectedbetweenthe
inspectionintervalsisrecommendedifyou
towatrailerfrequently.
—Avoiddrivingwithatrailerduringthevehi-
clebreak-inperiod.
Drivingwithatrailer
Drivingwithatrailerrequiresextracaution.
Speed
Adheretothelegalspeedlimits.Followthelegal
regulationsspecifictothecountry.
Asthespeedincreases,thedrivingstabilityof
thetrailerdecreases.Thereforeyoushouldnot
exceedthemaximumlegalspeedlimitwhen
thereareunfavorableroad,weather,and/orwind
conditions.Thisespeciallyapplieswhendriving
downhill.
Hill
Whenyoustartdrivinguphillordownhill,trailers
maytiltorswaysoonerthanwhendrivingona
levelsurface.Ifsmallswayingmovementshave
alreadyoccurred,youcanstabilizethetrailerby
firmlybrakingimmediately.Nevertryto
“straightenout”thetrailerbyaccelerating.
92
Downshiftbeforedrivingonhillstoutilizetheen-
ginebrakingeffect>A\.
Brakes
Whenusingatrailerwithoverrunbrakes,first
brakegentlythenquickly.Thisreducestheriskof
jerkingwhilebrakingifthetrailerwheelslockup.
Enginecoolanttemperature
Payattentionspecificallytothecoolanttempera-
ture display whentherearehighoutsidetemper-
atures,andwhendrivingonlonginclines
=>page14.Shifttoahighergearinatimelyman-
ner.

ZAWARNING
Constantbrakingcausesthebrakestoover-
heatandcansubstantiallyreducebrakingper-
formance,increasebrakingdistance,orcause
completefailureofthebrakesystem.