2003 PORSCHE 911 CARRERA USB

Brake
booster
Thebrakeboosterassistsbraking
only

whentheengineisrunning.

Whenthecarismovingwhiletheengineisnot
running,orifthebrakeboosterisdefective,
morepressureonthebrakepedalisrequiredto
bringthecartoastop.
Moistureorroadsaltonbrakesaffectsbraking.
Whenthevehicleisdrivenonsaltedroadsfor
extendedperiods,thebrakesshouldbewashed
downthoroughlyaboutevery2weeks.Anauto-
maticcarwashfacilitycannotdothisjob
properly.
Brakeswilldryafterafewcautiousbrakeappli-
cations.

A.Warning!
Drivingthroughwatermayreducethetrac-
tion.
Moistureonbrakesfromroadwater,car
wash,orcoatingofroadsaltmayaffect
brakingefficiency.
t>Cautiously
applybrakes
to
testbrakesafter
beingexposed.
Brakewear
Yourcarhasexcellentbrakes,buttheyarestill
subjecttowear.Therateatwhichtheywear
dependsonhowthebrakesareused.

t>
Havethebrakesysteminspectedattheinter-
valsrecommendedinyourMaintenance
Booklet.

8
@
WarninglightUSA
WarninglightCanada

Ifthelightsintheinstrumentpanelandon-board
computerstayonwhentheengineisrunningor
comeonwhiledriving,thebrakepadsareworn,
excessively.
t>Donotcontinuetooperatethevehicle.
HaveyourauthorizedPorschedealerinspect
orreplacethebrakepads.
Brakepads
Wearonthebrakepadsandbrakediscs
dependstoagreatextentonthedrivingstyle
andtheconditionsofuseandthereforecannot
beexpressedinactualmilesontheroad.
Thehigh-performancebrakesystemisdesigned
foroptimalbrakingeffectatallspeedsandtem-
peratures.
Certainspeeds,brakingforcesandambient
conditions(suchastemperatureandhumidity)
thereforemightcausethebrakestosqueal.

Newbrakepadsorlinings

Newbrakepadshavetobe"brokenin",and
thereforeonlyattainoptimalfrictionwhenthe
carhascoveredseveralhundredmilesorkm.
Theslightlyreducedbrakingabilitymustbe
compensatedforbypressingthebrakepedal
harder.Thisalsoapplieswheneverthebrake
padsandbrakediscsarereplaced.
Controls,Instruments
55

Generalinformationregardingthe
on-boardcomputerfunctions
Rangeonremainingfuel
Therangeonremainingfueliscontinuously
recomputedwhiledrivingbasedonfuellevel,
currentconsumptionandaverageconsumption.
Themorethefuellevelfalls,themoresponta-
neouslythedisplayreacts.Forthisreason,
rangeonremainingfuelisnotdisplayedifless
than15kilometres(9miles).
Ifthevehicle'sinclinationchangeswhiledriving
orrefuelling,incorrectrangeinformationmay
temporarilybegiven.
Note
Ifthetankisnearlyemptyandyouaddonlya
smallquantityoffuel,thiscannotbeusedto
calculatetherangeonremainingfuel.

Averageconsumptionandaveragespeed

Thedisplayedvaluesarebasedonthedistance
travelledsincethelastresetto"zero".
Youcansetthestartingtimeforameasurement
beforeorduringthetrip.
Switchingtheignitionoffdoesnotresetthe
measurements.Valuescanthusbecollected
overlongperiods.
Disconnectingthecarbatteryclearsthese
memories.
Outside
temperature
The
outsidetemperaturedisplaydoesnotindi-
cate,ificeisontheroad.
Evenifatemperatureabove32°F(O°C)isdis-
played,icemaystillformontheroad,forin-
stanceonbridgesorwhentheroadpasses
throughaheavilyshadedarea.
Controls,Instruments
91

~
Defrosting
the
windshield

I>Pressbutton.
Windshieldisdemistedordefrostedas
quicklyaspossible.
Airflowstothewindshieldonly.

{}
Switchingcompressorfor
air-conditioningsystem
onoroff
Wheneveroutsidetemperaturesexceed

3rFj3°C,
theair-conditioningcompressorisal-
waysswitchedoninautomaticoperation.
Thecompressorcanbeswitchedofftosave
fuel,butcontrolcomfortisthenlimited.
I>Pressbutton.
Thecompressorisswitchedoff,thesymbol
intheleft-handdisplaygoesout.
Iftheinteriortemperatureistoohigh,switch
compressorbackonorpress"auto"-button.
Todryincomingairindampweather,donot
switchofftheair-conditioningcompressor.
Thispreventsmistingofwindows.
B-
Adjustingblowerspeed

I>Presstheappropriatebutton.
Presetblowerspeedisincreasedorde-
creased,and"Manual"appearsintheright-
handdisplayfield.
c8J
Thespeedstagesareindicatedbya
bardisplay.
Iftheminusbuttonispressedatthelowest
blowerstage,theblowerandautomaticcontrol
areswitchedoff.
"OFF"isdisplayedintheleft-handdisplay.
Pressingontheplusbuttonorthe"auto"button
switchestheblowerandautomaticcontrolback
onagain.

Circulating-airsetting

/!\Warning!
Riskofaccidentduetohamperedvision.
Incirculating-airsetting,thewindowscan
mistup.
I>Onlyselectcirculating-airsettingforshort
periods.
I>Ifwindowsmistup,turnoffthecirculating-air
settingbypressingthecirculating-airbutton
brieflyandselectthefunction"Defrostwind-
shield".
-
\..J
Switchingcirculating-airsetting
onoroff
I>Pressbutton.
Theoutside-airsupplyisinterruptedandonly
theinsideairiscirculated.
Overapprox.
37°F/3°C

Iftheair-conditioningcompressorwasoff,it
switchesonautomatically.Thedurationofcircu-
lating-airmodeisnotlimited.
Belowapprox.
37°F/3°C

Theair-conditioningcompressorisswitchedoff.
Circulating-airmodeisautomaticallyendedafter
approx.3minutes.
I>I>I>
Controls,Instruments
107