fuel AUDI Q3 2015 Owners Manual

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0 ::i co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Airbag system ............ ... .. 112
Important things to know . . . . . . . . . . 112
Front airbags .................... 116
Monitoring the Advanced Airbag
System . . . . . . . . . . . . . . . . . . . . . . . . . 123
Side airbags . . . . . . . . . . . . . . . . . . . . . 127
Side curtain a irbags . . . . . . . . . . . . . . . 130
Child Safety . . . . . . . . . . . . . . . . . . . 133
Important things to know . . . . . . . . . . 133
Child safety seats . . . . . . . . . . . . . . . . . 139
Installing a child safety seat . . . . . . . . 143
LATCH Lower anchorages and tethers
for child ren . . . . . . . . . . . . . . . . . . . . . . 146
Additional Information
lSl
Vehicle operation . . . . . . . . . . . . . 1S2
Intelligent technology . . . . . . . . 152
Notice about data recorded by the
Event Data Recorder and vehicle
control modules . . . . . . . . . . . . . . . . . . 152
Electronic Stabili zation Control (ESC) . 153
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 156
Electromechanical steering . . . . . . . . . 158
Driving with your quattro . . . . . . . . . . 158
Energy management . . . . . . . . . . . . . . 159
Driving and environment . . . . . 161
The first 1,000 miles (1,500 km) and
afterwards . . . . . . . . . . . . . . . . . . . . . . 161
Avoid damaging the vehicle. . . . . . . . . 161
Catalytic converter . . . . . . . . . . . . . . . . 161
Shutting down vehicle . . . . . . . . . . . . . 162
Operate your vehicle economically and minimize pollution. . . . . . . . . . . . . . . . 162
Driving offroad . . . . . . . . . . . . . . . . . . . 164
Trailer towing . . . . . . . . . . . . . . . . . 166
Driving with a trailer . . . . . . . . . . . . . . 166
Trailer towing tips . . . . . . . . . . . . . . . . 168
Vehicle care . . . . . . . . . . . . . . . . . . . 170
Vehicle care and cleaning . . . . . 170
General information . . . . . . . . . . . . . . 170
Car washes . . . . . . . . . . . . . . . . . . . . . . 170
Cleaning and care information . . . . . . 171
Table of contents 3
Fuel supply and filling your
fuel tank ..... .... ..............
175
Gasoline .. .. .. .. .. .. .. .. .. .. .. .. 175
Fuel tank. . . . . . . . . . . . . . . . . . . . . . . . 176
Checking and filling . . . . . . . . . . . 179
Engine hood . . . . . . . . . . . . . . . . . . . . . 179
Engine compartment ............. .
Engine oil . .. .. .... ... .. ..... ... .
Engine cooling system .......... .. .
Brake fluid ....... .............. .
Battery ........................ .
Windshield washer container
Tires and wheels ... ..... ... .. .
181
181
186
189
190
193
195
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Tire pressure monitoring system 213
Do-it-yourself service . . . . . . . . . 216
What do I do now? ............ 216
General information . . . . . . . . . . . . . . 216
Vehicle tool kit with lifting jack . . . . . . 216
Folding chocks . . . . . . . . . . . . . . . . . . . 217
Removing bass box . . . . . . . . . . . . . . . 217
Space-saving spare tire (compact
spare tire) . . . . . . . . . . . . . . . . . . . . . . . 217
Changing a wheel . . . . . . . . . . . . . . . . . 218
Fuses and bulbs . . . . . . . . . . . . . . . 224
Fuses. ....... ... .. .............. 224
Bulbs. . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Emergency situations . . . . . . . . . 228
General . . . . . . . . . . . . . . . . . . . . . . . . . 228
Starting by pushing or towing . . . . . . . 228
Starting with jumper cables . . . . . . . . 228
Use of jumper cables . . . . . . . . . . . . . . 229
Emergency towing with commercial
tow truck . . . . . . . . . . . . . . . . . . . . . . . 230
Lifting vehicle . . . . . . . . . . . . . . . . . . . . 232
Technical data . . . . . . . . . . . . . . . . . 234
Technical Data . . . . . . . . . . . . . . . . . 234
Vehicle identification . . . . . . . . . . . . . . 234
Weights . . . . . . . . . . . . . . . . . . . . . . . . 234
Dimensions . . . . . . . . . . . . . . . . . . . . . . 235
•
•

10 Instruments and warning/indicator lights
Instruments and warning/indicator Lights
Instruments
Instrument cluster and controls
The instrument cluster is your central source of information.
Fig. 3 Ove rv iew of the instrument cluster
(D ISETI button .... .... .. .... . .
@ Tachometer with ind icator
lights .. ............. .... . .
® Coolant temperature gauge .. .
© Turn signal indicator lights . .. .
® Disp lay
- Driver information system .. .
- Warning/indicator lights . .. .
- Fuel gauge* ....... .. .. .. .
- Odometer ........ .... .. . .
® Speedometer with indicator
lights 23
11
10
41
20
11
11
23
(J) Fu el gauge . . . . . . . . . . . . . . . . . 11
® Reset button for trip odometer 23
(D Tips
-The illumination for the instrument clus­
ter lights up whenever you switch on the
ignition with the
vehicle headlights off .
As the daylight fades, the instrument
cluster illumination likewise dims auto­
matically a nd will go out completely
when the outside light is very low. This
feature is meant to remind you to switch
on the headlights when outside light
conditions become poor .
Engine coolant temperature gauge
CX) N N 0 :'> CX) IX)
The engine coolant gauge q page 10, fig. 3 ®
only works when the ignition is on. To prevent
damage to your engine, please note the fol ­
lowing important points:
Engine cold
If the needle is at or close to the bottom of
the gauge, the engine has not yet reached its
operating temperature. Avoid high engine
speeds, heavy engine loads, and heavy throt ­
tle app lications.
Normal temperature
When the engine has reached its operating
temperature, the needle will move to the mid­
dle of the gauge and remain there . If the en­
gine is working hard at high outs ide tempera­
tures, the needle may move higher on the
gauge. This is not a cause for concern as long
as the . warn ing light in the instrument
cluster display does not illuminate. If the.
warning light in the instrument cluster dis­
play flashes, the coolant temperature is too
high
¢ page 14. .,.

Instrument s and warnin g/indic ator ligh ts 11
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& WARNING
-Always observe the wa rning in
¢
page 179, before opening the hood
and checking the engine coolant level.
- Never open the engine hood if you see or
hear steam, or if you see engine coolant
dripping from the engine compartment.
You could burn yourself. Let the engine cool off first so that you cannot hear or
see any steam or engine coolant.
(D Note
- Mounting additional lights or accessories
in front of the air inlets reduces the cool­
i ng effect of the rad iator. At h igh outside
temperatures or high eng ine load, the
engine could overheat.
- The front spo iler has been designed to
proper ly distr ib ute the cooling air when
the veh icle is moving.
If the spoiler is
damaged, this cou ld redu ce the cooling
effect and the engine co uld then over­
heat. Ask yo ur autho rized Aud i de aler f or
assistance.
Tachometer (engine rev counter)
The tachometer indicates the engine RPM
(revolutions per minutes).
If engine R PM drops be low 1,500, you should
downshift to the next lower gear. The red area
at the e nd of the sca le ind icates maximum
permissible engine RPM after the break- in pe­
riod. Before reaching this area, move these­
l ector lever to position D/S or ease your foot
off the accelerator peda l.
(D Note
The tachometer needle@¢ page 10,
fig. 3 sho uld only briefly be in the red
zone: you could damage your engine! The
beg inning of the red zone varies depend­
ing on the engine.
@) For the sake of the environment
Upshift ing early saves fue l and reduces en-
~ gine noise. ,....,
Fuel gauge
T he fuel gauge wo rks only when the ignition is
o n.
When the needle reaches the red a rea, the
warning light
Ii] in the instrume nt cluster
will illuminate
¢ page 18. Time to refuel!
The tota l tank capacity of your ve hicle is listed
i n
¢ page 235.
(1) Note
Never run the ta nk completely dry! An ir­
regular supply of f uel can cause engine
misfiring and fuel could enter into the ex­
haust system . The catalytic converter
could t hen ove rheat and be damaged.
Warning/indicator
Lights
Description
T he ind icator lights in the instrument cluster
blink or tur n on. They indica te funct io ns or
malfu nctions ¢
.&,..
Messages may appea r with some indicato r
lights. A warning signal may sound at the
same time. The indicato r lights and messages
in the disp lay can be replaced by othe r d is­
plays. In the dr iver informa tion system, you
can display the messages aga in
¢ page 21 .
Some indica tors lig hts in the d isplay can turn
on i n severa l colors.
& WARNING ~
- Failure to heed warning ligh ts and other
important vehicle information may res ult
in ser ious personal inj ury or vehicle dam­
age.
- Whenever stalled or stoppe d for repair,
move the vehicle a safe d istance off the
road, stop the engine, and turn on the
emergency flasher ¢
page 43.
-The engine compartment o f any motor
ve hicle is a potentially hazardous area.
Before you check anything in the engine

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Instrument s and warnin g/indic ator ligh ts 15
If the indicator light turns on and the mes ­
sage appears , let the engine run at idle for a
few minutes to cool down .
A WARNING
-If your veh icle should break down for
mechanical or other reasons, park at a
safe distance from moving traffic, turn
off the engine and turn on the hazard
warning lights¢
page 43, Emergency
flashers.
-
- Never open the hood if you see or hea r
steam o r coolant escap ing from the en­
gine compartment - you risk being s cald­
ed . Wa it until you can no longe r see or
hear s team or coo lant escaping .
- T he e ngine compartment of any veh icle
is a dangerous a rea. Before you perform
any work in the engine compartment,
tu rn of the engine and allow it to cool.
Follow the warning stickers¢
page 179.
(D Note
Do not contin ue driving if the . symbo l
illuminates. There is a ma lf u nct ion in the
engine cooling system -you co uld damage
your eng ine.
The red engine oil pressure warning symbol
requires immediate service or repair . Driving
with a low-oil -pressure indication is likely to
inflict severe damage to the engine.
• Turn off engine! Oil pressu re i s too low.
Tu rn off the eng ine and do no t continue dr iv ­
ing . Chec k the engine oil leve l¢
page 184.
- If the engine oil level is too low, add engine
o il ¢
page 184 . Only continue dr iv ing if the
indica tor l igh t turns off.
- If the engine oil leve l is correct and the indi­
c ator lig ht st ill turns on, tur n the eng ine off
and do not contin ue d riving. See yo ur a u­
tho rized Aud i dea le r or q uali fied repa ir fa­
c ili ty.
(D Tips
- The engine oil pressure symbol. is
not an indicator for a low engine o il lev­
el. Do not rely on it . Instead, check the
o il level in yo ur engine at regular inter ­
vals, preferably each time you refuel ,
and alway s before going on a long trip .
- The yellow oil lev el warn ing indication
l!I requires oil refill or workshop serv­
ice without delay . Do not wait until th e
red oil pressure warning. start s to
fla sh before you respond to the low oil
level warning
m. By then, your engine
may alread y have suffered serious dam­
age.
D Battery
The .warn ing/ indicator light i llum inates
when you switch on the ignition and must go
out after the eng ine has started.
• Alternator fault : Battery is not being
charged.
If the indicator light turns on and the mes­
sage appears, there is a malfunction in the generator or vehicle electrical system .
Drive to your authori zed A udi dealer or quali­
fied wor kshop immed iate ly . Because the ve hi­
cle battery is discharging, turn off all unnec ­
essary e lectrical equipment such as the radio.
Seek professiona l assistance if the battery
charge level is too low.
(•) low battery cha rge: B atter y will be
charged while driving .
If the indica to r ligh t turns on and the mes­
sage appears, there may be limited sta rting
ability .
If this message turns off afte r a little while,
the battery c ha rged enough while drivi ng.
If the message does not turn off, have you r
autho rized Aud i dea le r or qualified wor kshop
cor re ct t he malfu nction.

Instrument s and warnin g/indic ator ligh ts 17
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not illuminate when you switch the ignition
on, this also means there is a malfunction .
A WARNING
If you have a malfunction in the safety sys­
tems, contact your author ized Audi dealer
immediately. Otherw ise the safety sys­
tems may not work properly in an acci­
dent .
(0 ) Worn brake pads
Ill Brake pad s!
If the warn ing light illum inates, immediately
contact your authorized Audi dealer or quali­
fied workshop to have all brake pads inspect ­
ed. On USA models the warning light
Ill
comes on together with the warn ing light •.
Both sets of b rake pads on an axle must al­
ways be rep laced at the same time.
A WARNING
Dr iv ing with bad brakes can cause a coll i­
sion and serious personal injury.
- If the wa rning light Ill and the warning
light
. ll with the message Brake pad s!
comes on in the instrument cluste r dis­
play, immediately contact your author­
i z ed Audi dealer or qualified workshop to
have all brake pads checked or replaced if
necessary .
EPC Electronic power control
This warning/indicator light monitors the
elec tronic power control .
The [31 warning/indicator light (E lectronic
Power Control) i lluminates when you switch
the ignition on as a function check .
-
If t his warning/indicator light ill uminates
while you are driving, then there is a ma lfunc ­
tion in the engine electron ics. Have the mal ­
function corrected as soon as possible by your
,....,
~ 1 ) . : USA models only
authorized Aud i dea le r or a qualified repair fa ­
cility.
· o Malfunction Indicator Lamp (MIL)
The Ma lfunction Indicator Lamp (MIL) is part
of the On-Board Diagnostic (OBD II) system.
The symbol
('4 lights up when the ignition is
switched on and will turn off after the eng ine
has started and has settled at a constant idle
speed . This i ndicates that the M IL is work ing
properly.
The warning light illuminates when there is a
malfu nction in the e ngine electron ic system .
Co ntact you r aut ho rized Aud i dea le r and have
t h e malfunc tion corrected.
An improperly closed fuel fille r cap may a lso
cause the MIL light to illuminate
q page 177 .
For more information q page 26.
!?; Engine speed limitation
App lies to vehicles: wi th engine speed limi tati on
(fl Do not e xce ed ma x. engin e speed of
XX.XX rpm
The Ill symbol illuminate s when there is an
engine contro l ma lf unct ion. The
(31 indicator
light in the instrument cluster also illumi ­
nates . The engi ne speed is limited to the
speed displayed in the d river info rmat ion sys­
tem. Keep in mind that the engine speed w ill
not exceed the val ue d isplayed in the dr iver in­
f ormat ion system, for example when down­
shifting .
D rive to your authori zed A udi dealer immed i­
ate ly to have the ma lfunction corrected .
!:( .. Engine oil level
1!1;111 Check oil level.
If the indicator light and the message appear,
add engi ne oil immediately
<=> page 181.

18 Instruments and warning/indicator lights
't':r.,. Engine oil sensor
1!11a Oil level sensor: System fault!
If the symbol illuminates, contact your au ­
thor ized Audi dealer a nd have the oil sensor
inspected. Until you have th is done, check the
oil level each time you refuel just to be on the
safe side~
page 184.
Bil Tank system
DD Please refuel
If the indicator light turns on for the first
time and the message appears, there are
about 1.8- 2.2 gallons (7.0 -8.5 li ters) of fue l
l eft in the tank . Time to refuel
~page 176.
ID'J Fuel tank system malfunction! Contact
dealer.
If the indicator light turns on and th is mes ­
sage appears, there is a malfunction in the
tank system.
Drive to your authorized Aud i dealer immedi­
ately to have the malfunction corrected .
B Please refill washer fluid.
If the symbol illuminates, add windshield
washer fluid to the windshield washer system .
©-Engine start system
Ill Engine start system: Malfunction! Please
contact dealer.
If the indicator light turns on and the mes­
sage appears, do
not sw itch the ignition off
because you may not be able to switch it on
again.
Drive to your authorized Aud i dealer immedi­
ately to have the malfunction corrected .
Engine start system: Malfunction. Please
contact dealer.
There is a malfunction in the engine start sys ­
tem . Drive to
your authorized Audi dealer immedi­
ately to have the ma lfunction corrected.
i§i Defective light bulb warning
If the J:I indicator light turns on, a bulb has
failed. The message ind icates the location of
the bu lb .
Vehicle lights: System fault!
If the message appears, there is a malfunc­
tion in the headlights or lig ht switch.
Drive to your authorized Audi dealer immedi­
ately to have the malfunction corrected .
&, WARNING
-Light bulbs are pressurized and could ex­
p lode whi le they are being changed caus­
ing serio us personal injury.
- Work with due care when handling the
high-vo ltage section of gas discharge
(xenon) lights*. Failure to do so could re­
sult in death or serious injury.
{D Tips
Have the bulb replaced or the connect ion
r epaired by your authorized Audi Service
department.
~0 Headlight range control
II Headlight range control: System fault!
If the symbol II illuminates , the dynamic
headlight range control is no longer working
proper ly . Have the system checked and re­
paired at your a uthorized Audi dea ler.
§0 Audi Adaptive Light
Appl ies to vehicles : wit h Audi adapt ive light
mfl Audi adaptive light: System fault!
If the indicator light turns on and this mes­
sage appears, there is a malfunction in the
adaptive light system. The headlights still
funct ion.

22 Driver information display
Resetting values to zero
.,. Se lect Computer or Efficiency program
from the Vehicle functions menu.
.,. Se lect a value in the desired trip computer
or the efficiency program.
.,. To reset the figures in the selected memory
to zero, press the thumbwheel @for one
second.
Assigning a function to the steering wheel
button
.,. Se lect : I MENU I button > Systems or Car Sys­
tems
> Vehicle settings > Steering wheel
button .
Calling up warning/indicator lamps and
driver messages again
.,. Select the display tab marked 0 .
The tab marked D is only visible if one or
more warning/indicator lamps or driver mes­
sages are disp layed. Other tabs are only visi­
b le if the corresponding system is switched
on .
Trip computer
Fig. 8 Tri p computer d isp lay: Memo ry leve l 1
Operation by windshield wiper lever*
.,. Press the I RESET I button @¢ page 21,
fig. 5 repeatedly unti l the trip computer ap­
pears on the display .
.,. To show more information, press button@.
Operation by multifunction steering
wheel*
.,. Call up the vehicle functions and select
Computer from the menu ¢ page 21.
.,. To show more information, scroll the
thumbwheel @9page21,
fig. 6 .
T he number
D or fl in the top corner of the
trip computer display shows which t rip com­
puter is currently being displayed .
T rip computer
D ¢ fig. 8 is a s ingle journey
memory. It processes the information on a
jo urney from the time the ignition is switched
on until it is switched off. If the journey is re­
sumed within two hours after the ignit ion is
switched off, the new figures are automatical­
ly included in the calculation .
Unlike the single journey memory, the total
journey memory (trip computer
fl ) is not
erased automatically. In this way, you can de­
termine the period for which you wish the trip computer to supply dr iv ing information.
You can call up the following information se­ quentially on trip computer
D or fl:
- Date
- Fue l range
- Dr iving t ime (h)
-Average fuel consumption
- Average speed
- Distance covered
- Current fuel consumption
(D Tips
-All va lues stored in the memory are
erased if the vehicle battery is discon­
nected.
- Th e measurement units may be different
on vehicles for some markets.
- For information on the efficiency pro­
gram, refer to ¢
page 24 .

24 Drive r information d isplay
Efficiency program
Description
Applies to vehicles: with trip computer w ith eff icie ncy
program
Fig. 12 Display : efficiency program
Operation bywindshield wiper lever*
.,. Press the I RESET I button @ c::> page 21,
fig. 5
repeatedly until the efficiency pro­
gram appears in the display.
Operation bymultifunction steering
wheel*
"'Call up the vehicle funct ions and select Effi-
ciency program from the menu c::> page 21.
The effic iency program can help to save fuel.
It evaluates fuel eff ic iency data and shows a
list of aux iliary equ ipment affecting fuel con­
sumption
cc:> page 24. It also provides econo­
my tips¢
page 25 for saving fuel.
The efficiency program uses the trip and fuel
consumption data from on-board computer
1.
When you clear the data from the efficiency
program
¢page 22/c::>page 21, the values in
on-board computer 1 are reset to zero.
Other equipment
Applies to vehicles: wit h trip computer with efficiency
prog ram
Fig. 13 Display: other equ ipment
Requ irement: The efficiency program ii must
have been called up¢
page 24.
"' Operation by windshield w iper lever" : Press
button ®
<=:>page 21, fig. 5 repeatedly unti l
the other equipment appears in the display
¢fig . 13.
"' Operation by multifunction steering wheel*:
Scro ll the thumbwheel @c::>
page 21, fig. 6
until the other equipment appears in the
display.
Other equipment that is currently affecting
fuel consumption is listed in the efficiency
program. The display shows up to three other
items of equipment @. The equipment using
the most fuel is listed first .
If more than three
items using fuel are switched on, the equip­
ment that is currently using the most fuel is
displayed.
A scale @also shows the current total con­
sumption of all other equipment.

M N M N
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rl I.O
"' rl
"' rl
Fuel economy messages
App lies to vehicles: with trip computer w it h eff ic iency
p rogram
Fig . 14 Display: fuel economy message
Fue l economy messages are disp layed when
fuel consumption is increased by certain con­
ditions. If you follow these fuel economy mes­
sages, you can reduce your vehicle's consump­
tion of fuel. The messages appear automati­
cally and are only displayed in the effic iency
program. The fuel economy messages turn off
automatically after a certain period of time.
• To turn a fuel economy message off immedi­
ately, press any of the controls on the wind­
shield wiper lever*/multifunction steering
whee l* .
(D} Tips
- Once you have turned a fuel economy
message off, it will only appear again af­
ter you t urn the ignition on aga in.
- The fuel economy messages are not dis­
played in every instance, but rather in in­
te rva ls over a period of time.
Dri ver inform ation di spl ay 25
Service interval display
The service interval display reminds you when
your next service is due.
Fig. 15 Display: Service interval display (example)
The schedule for the next o il change or inspec­
t ion is ca lculated automatica lly and disp layed
accord ingly. The d isp lay works in two stages:
-Serv ice rem inder: After a spec ified number
of miles, a message appears in the instru­
ment cluster display when switching the ig­
nition on
¢fig. 15. The rema ining dis tance
or time is displayed br iefly.
- Se rvi ce due : When the due date for serv ice
is reached, the message
Se rvic e due! ap­
pears in the instrument cluster immediate ly
after you turn on the ignition .
Calling up the service schedules
If or when an oil change or inspection is due,
can be shown in the rad io or MMI* disp lay by
selecting the service i nte rva l display in the car
menu . Selec t!CAR ! fuction button>
Sy ste m s
or C ar s ystem s > Ser vicing & check s > Service
intervals.
Resetting the service interval displa y
Your author ized Audi dealer will reset the cor­
respondi ng service schedule after pe rforming
the appropr iate service on your veh icle. You
also have the possibi lity to reset the oil
change schedule after having performed an
oil change according to Audi specifications.
Se lect !CARI function button>
Sy stem s or Ca r
sy ste ms
> Servicing & checks > Service int er-
val s
> Reset oil cha nge int erval. ""

26 Drive r in form ation d ispl ay
(D Note
-Only reset the oi l change display when
you have completed an o il change .
- If you d isconnect the battery term inals,
no calculatio ns can be made for the serv­
ice interval display during this time and
no service rem inder will appear . Remem­
ber that observing the proper service in­
tervals is vitally important to extending
the life of you r vehicle, particularly the
engine, and maintaining its value. Even if
the mileage dr iven is low, the max imum
period of one year from one serv ice to
the next must not be exceeded.
On-Board Diagnostic
system (OBD)
Malfunction Indicator Lamp (MIL)
The Malfunction Ind icator Lamp (MIL) ¢'4 i n
the instrument cluster is part of the On-Board
Diagnostic (OBD II) system.
The warning/indicator light illuminates when
the ign ition is switched on and goes o ut after
the engine starts and the idle has stabilized.
Th is indicates that the MIL is working proper­
l y.
If the light doe s not go out after the eng ine
is started, or illuminates wh ile you are driv­
ing, a ma lfunction may exist in the engine sys­
tem . If the light illuminates, the catalytic con ­
verter cou ld be damaged.
Continue driving
w ith reduced pow er (avoid­
ing sustained high speeds and/or rapid accel­
erations) and have the condition corrected.
Contact your authorized Audi dealer .
If the light ill uminates, the electronic speed
limiter may also be ma lfunctioning . For more
information
¢ page 2 7, Electronic speed
limiter.
An imp roperly clo sed fuel filler c ap m ay als o
c a u se th e M IL l ight to illuminate
¢ page 177.
On-Board Diagnostics
Fig. 16 Locat io n of Data Li nk Conn ector (DLC)
On-Board D iagnostics monitors the compo­
nents of your em ission contro l system . Each
monitored component in your engine system
has been ass igned a code . In case of a mal­
funct ion, the component will be identified
and the fault stored as a code in the control
module memo ry.
The MIL light may also illuminate if there is a lea k in the on-board fuel vapor recove ry sys­
tem . If the ligh t illuminates after a refueling,
stop the vehicle and make sure the fuel fille r
cap is prope rly closed (only vehicles w ith gaso­
line engine) ¢
page 177.
In order to make a n accurate diagnosis, the
stored data can on ly be displayed using spe­
c ial d iagnostic equipment (generic scan tool
for OBD).
In order to con nect t he special diagnostic
equipment, push the plug in to the Data Link
Connector (D LC). The D LC is located to the
right o f the hood release
<::!;> fig. 16.
Your a uthorized Audi dea le r or qua lified wor k­
shop can interpret the code and perform the
necessary repair.
,&_ WARNING ~ -
Do not use t he diagnost ic connecto r fo r
personal use . Incorrect usage can cause
mal functions, wh ich can increase the risk
of a collision!