2009 AUDI S6 catalytic converter

On-Board Diagnostic system (08D)
Malfunction Indicator Lamp (MIL)
The Malfunction Indicator Lamp (MIU ~ in the instrument cluster
~ page 16, fig. 7 is part of the On-Board Diagnostic (OBD ID system.
The warning/indicator light illuminates when the ignition is
switched on and goes out after the engine starts and the idle has
stabi lized . This indicates that the MIL is working properly.
If the light does not go out after the engine is started, or illuminates
while you are driving, a malfunction may exist in the engine system.
If the light starts flashing, the catalytic converter could be damaged.
Continue driving
with reduced power (avoiding sustained high
speeds and/or rapid accelerations) and have the condition
corrected. Contact your authorized Audi dealer.
If the light illuminates, the electronic speed limiter may also be
malfunctioning . For more information~
page 27, "Electronic speed
limiter".
An improperly closed fuel filler cap may also cause the MIL light to
illuminate
~ page 297. •
On-Board Diagnostics
Con tro ls and eq uip­
ment
Fig . 16 Location of
Data Link Connector
(D LC )
Driver information display
On-Board Diagnostics monitors the components of your emission
control system. Each monitored component in your engine sys tem
has been assigned a code. In case of a malfunction, the component
wil l be identified and the fault stored as a code in the control
module memory .
The M IL light may also illuminate if there is a leak in the on -board
fuel vapor recovery system. If the light illuminates after a refuelling,
stop the vehicle and make sure the fuel filler cap is properly closed
~ page 297.
In order to make an accurate diagnosis, the stored data can only be
d isplayed using special diagnostic equipment (generic scan tool for
OBDl.
In order to connect the special diagnostic equipment, push the plug
into the Data Link Connector (DLC). The DLC is located to the right of
the hood release~ fig. 16.
Your authorized Audi dealer or a qua lified service station can inter­
pret the code and perform the necessary repair. •
Electronic speed limiter
Your vehicle may be factory equipped with tires that are rated for a
maximum speed of 130 mph (210 km/h). This is less than the
maximum speed of your vehicle. To reduce the risk of sudden tire
failure and loss of control if the vehicle is operated at excessive
speeds, your vehicle also has an electronic speed limiter. The elec­
tronic speed limiter prevents your vehicle from going faster than the
tire speed rating. For more information~
page 329.
If the engine control unit receives faulty vehicle roadspeed signa ls,
the Malfunction Indicator Lamp (MIU will i lluminate . If this
occurs, contact the nearest authorized Audi dealer for assistance. .,.
Vehicle care I I Technical data

_______________________________________________ A_ u_t _o _m_ a_ t_ i_ c _ t_r _ a _n _s_ m_ i_ s _ s_ i_ o _ n _ ___._
R -Reverse
The transmission will automatically select the lowest gear ratio
when you shift into reverse .
Select
R only when the vehicle is at a full stop and the engine is
running at idle speed=>
& in "Driving the automatic transmission"
on
page 155 .
Before you move the selector lever to R, press both the button in the
handle of the selector leve r
and the brake pedal at the same time .
When the ignition is on , the backup lights illuminate when the
selector lever is moved into
R.
N -Neutral
The transmission is in neutral in this position . Shift to this position
for standing with the brakes applied=>
page 157.
When the vehicle is stationary or at speeds below 3 mph (5 km/h),
you must always apply the footbrake befor e and while moving the
lever out of
N.
D -Normal position for driving forward
Position Dis for normal city and highway driving. It ranges from zero
to top speed and all gears shift automatically , depending on engine
load , driving speed and automatically selected shift programs.
When the vehicle is stationary or at speeds below 3 mph (5 km/h),
you must always apply the foot brake before and while moving the
lever to
D out of N.
In certain circumstances it may be advantageous to temporarily
switch to the manual shift program to manually select gear ratios to
match specific driving conditions=>
page 159.
S -Sport position
Select this position for sportier performance . In this position, the
transmission will not upshift as soon, allowing the vehicle to use the
increased power available at higher engine speeds to achieve live­
lier acceleration.
Con tro ls and eq uip­
ment
When the vehicle is stationary or at speeds below 3 mph (5 km/h),
you must always apply the foot brake before and while moving the
lever to
S out of N.
& WARNING
Read and follow all WARNINGS => & in "Driving the automatic
transmission" on
page 155.
0 Note
Coasting downhill with the transmission in N and the engine not
running will result in damage to the automatic transmission and
possibly the catalytic converter. •
Applies to vehi cle s: with 6 -speed automati c tra nsm is si on
Automatic Shift Lock (ASL)
The Automatic Shift Lock safeguards you against acciden ­
tally shifting into a forward or the reverse gear and
causing the vehicle to move unintentionally.
Fig. 159 Shift gate:
selector lever lock
positions and interlock
button highlighted
The selector lever lock is released as follows:
- Turn the ignition on.
Vehicle care I I irechnical data

• ..__A_ u_ t _o_ m_ a_ t_ i_ c _ t_r _a _n_ s_ m_ is_ s_i o _ n ________________________________________________ _
Before you move the selector lever to R, press both, the button in the
handle of the selector lever
and the brake pedal at the same time .
When the ignition is on, the backup lights illuminate when the
selector lever is moved into R.
N -N eutr al
Sh ift to this position for standing with brakes applied=> page 164.
When the vehicle is stationary or at speeds below 3 mph (5 km/h),
you must always apply the footbrake before and while moving the
lever out of
N .
Do not use N for coasting downhill.
D -Normal dr iving po sition f or forward
Depending on the load on the engine, vehicle speed and the
dynamic control program, the transm ission will select the
optimal
gear ratio.
In certain circumstances it may be advantageous to temporarily
switch to the manua l shift program to manually select gear ratios to
match specific driving conditions=>
page 166.
When the vehicle is s tationary or at speeds below 3 mph (5 km/h),
you must always apply the footbrake before and while moving the
lever to
D ou t of N.
S -Spor t p osition
Select this position for sportier performance. In this position, the
transmission wil l not upshift as soon, allowing the vehicle to use the
increased power avai lable at higher engine speeds to achieve live ­
lier acceleration.
When the vehicle is stationary or at speeds below 3 mph (5 km/h),
you must always apply the foot brake before and whi le moving the
lever to
S out of N .
& WARNING
Re ad a nd follo w all WARNIN GS=> & in "Dr iv ing th e multitr oni c®"
on
page 16 2.
0 Note
Coasting downhill with the transm ission in N and the engine not
operating will result in damage to the automatic transmission and
possibly the catalytic converter. •
Applies to vehicles: with multitronic® Continuous ly Variable Transmission (CVT)
Automatic Shift Lock (ASL)
The Automatic Shift Lock safeguards you against acciden­
tally shifting in to a forward or the reverse gear and
causing the vehicle to move unintentionally.
F ig . 167 S hift gate:
se lect or l ever loc k
pos it ions a nd int erl ock
butt on high lighted
The selector lever l ock is rel eased as f ollows :
T u rn the ignition on .
Step on the brake peda l.
At the same time press and hold
the interlock button on the side of the gear selector knob
=> fig. 167 with your thumb until you have moved the
selector lever to t he desired position.
~

-Driving
and environment --=---------------
New brake pads
--
Remember that new brake pads do not have a full braking
effect during the first 250 miles (400 kilometers) after they
are installed .
New brake pads have to be "burnished in" before they have optimal
grab =>& .
During the break -in period, you should avoid putting severe loads
on the brakes . Severe loads include, for examp le, sudden hard
braking, in particular at very high speeds or, for example, on moun­
tain passes.
& WARNING
New brake pads don't have the best stopping power and must be
"broken-in" during the initial 100 to 150 miles (150 to 200 kilome­
ters) of normal city driving. You can compensate for this by
pressing the brake pedal more firmly . This also applies later when
new pads are installed.
:J
Catalytic converter
It is very important that your emission control system
(catalytic converter) is functioning properly to ensure that
your vehicle is running in an environmentally sound
manner.
- Always use lead-free gasoline:=> page 295, "Fuel supply".
- Never run the tank down all the way to empty.
- Never put too much motor oil in your engine ==>
page 306,
"Adding engine oil 't=:;r\11
•
Never try to push- or tow-start your vehicle.
The catalytic converter is an efficient "clean-up" device built into the
exhaust system of the vehicle. The catalytic converter burns many
of the po llutants in the exhaust gas before they are released into the
atmosphere.
The exclusive use of unleaded fuel is critically important for the life
of the catalytic converter and proper functioning of the engine.
& WARNING
• Do not park or operate the vehicle in areas where the hot
exhaust system may come in contact with dry grass, brush, fuel
spill or other material which can cause a fire .
• Do not apply additional undercoating or rustproofing on or
near the exhaust manifold, exhaust pipes, catalytic converter or
heat shields. During driving, the substance used for undercoating
could overheat and cause a fire .
0 Note
• Be aware that just one tank filling with leaded fuel will alr eady
seriously degrade the performance of the catalytic converter.
• Do not exceed the correct engine oil level=>
page 306.
• Do not drive until the fuel tank becomes completely empty. The
engine could misfire. Unburned fuel could also get into the exhaust
system and this could cause the catalytic converter to overheat.
• Do not turn off the ignition while the vehicle is moving.
• Do not continue to operate your vehicle under these conditions,
as otherwise fuel can reach the catalytic converter. This could result
in overheating of the converter, requiring its replacement .
• To assure efficient operation of the Emission Control System:
- Have your vehicle maintained properly and in accordance with
the service recommendations in your Warranty
& Maintenance
booklet. •

The engine and catalytic converter have to reach their optimal oper­
ating temperature to reduce fuel consumption and noxious emis ­
sions effectively.
Just after starting, a cold engine in a mid -size car only achieves a
fuel economy of 6-8 miles per gallon (30-40 1/100km) . After about a
half a mile, fuel economy climbs to 12 mpg (201/100 kml. After about
2.5 miles (4 km), the engine is at its proper operating temperature
and fuel economy has reached a normal level. So you can see that
you should avo id short tr ips whenever possible.
The outside temperature is also critical in this regard. Your car
consumes more fuel in the winter than in the summer. •
Controls and equip­ ment Safety first Vehicle operation
Driving
and environment
Vehicle care Do-it-yourself service Technical data

___ C_ le_ a _ n_i_n ~g _ a_ n_ d __ p_r _o _t _e _c_ t_ i_o _n ___________________________________________ _
brake dust is also corrosive. If left on for too long, brake dust can
cause pitting.
Use on ly specia l
acid-free cleaners formulated for a lloy r ims . Safe
products are available at your Audi dealer. Never leave the cleaner
on the ri ms longer than specified on the label. If not rinsed of f
promptly, the acid contained in some c leaners can attack the
threads o n the wheel bo lts .
Never use abrasive or metal po lishing c leaning agents. If the protec ­
tive coating has been chipped, e.g . by kicked up road dirt, touch i t
up as soon as poss ible .
& WARNING
• Moisture and i ce on b rake s may affe ct b raking effi cien cy
~ page 26 5, "General information ". Te st the brake s carefully ea ch
t ime you wa sh the vehi cle .
• Always read and heed all WARNINGS and other information
~ pag e 282. •
Body cavity sealing
T he body cavity sealing does not nee d to be checked .
All body cavities which could be affected by corrosion have been
t horoughly pr otected a t the factory .
This sealing does not require any inspection or additional treat ­
ment . If any wax should seep out of the cavity when the ambient
temperature is high, it can be removed with a plastic scraper and a suitable solvent .
& WARNING
Solvents can be dangerous.
• Ben zine is fla mmab le and to xic . If you use be nzine fo r removing
the wax , keep sparks, f lame and lighted cigarettes away . Never
& W ARN ING (continued )
dump benz ine on the ground , into open streams or down sewage
dra in s.
• Be sure to observe all safety and env ironmental regulat ions .
Follow all in struction s on the cont ainer .
• Alway s read and heed all WARNINGS and other inform ation
~ page 282 .•
Chassis
Have the u nderc oating c hecked for dama ge from tim e to
time.
T he lower body shell of your Audi is also thoroughly protected
aga inst corrosion .
Any damage to the undercoat ing caused by road hazards shou ld be
repaired promptly.
& WARNING
Too much undercoating in the wrong place s can cau se a fire .
• Do not app ly addition al und ercoating or rustproofing on or
near the exhaust manifold , exhau st pipe s, catalytic converter or
he at shield s. While dr iving , the sub stance used for underco ating
could overhe at and cau se a fire .
• Alwa ys read and heed all WARNINGS and other info rm ation
=> page282 .•

•
Fuel supply and filling your fuel tank
Gasoline
Fuel supply Using the right fuel helps keep the environment clean and
prevents engine damage.
Fuel r ecomm end ati on
The fuel recommended for your vehic le is unl eade d prem ium grade
gaso line . See also ~
page 369, "Data". Audi recommends using TOP
T IER Detergent Gasoline with a minimum octane rating of 91 AKI (95
RON). For more information on TOP TIER Detergent Gaso line, please
go to the official website (www.toptiergas .com).
The recommended gasoline octane rating for your engine can also be found on a label located on the inside of the fuel fille r flap. This
rating may be specified as AK I or RON .
Your vehic le may also be operated us ing unleaded regular gasoline
with a minimum octane rating of 87 AKl/91 RON . However, using 87
AKl/9 1 RON octane fuel will slightly reduce engine performance.
Use unle ad ed ga so line only . Unleaded gaso line is avai lable
throughout the USA, Canada, and in most European countries. We
recommend that you do not take your vehicle to areas or countr ies
where un leaded gasoline may not be available .
For more information on refueling your vehicle, see~
page 296.
Octane ra tin g
Octane rating indicates a gaso line's ability to resist engine
damaging "knock" caused by premature ignition and detonation.
Therefore, buying the correct grade of gaso line is very important to
help prevent possible engine damage and a loss of engine perfor ­
mance.
F ue l supply and fillin g you r fu el tank
Gasoline most common ly used in the United States and Canada has
the following octane ratings that can usua lly be found on the filler
pump:
• Premium Grade : 91 -96 AKI
• Regular Grade: 87 -90 AKI
Explanation of the abbreviations:
AKI = Anti Knock Index= (R +M)/2 = (RON +MON)/2
RON = Research Octane Number
MON
= M otor Octane Number .
0 Note
• Do not use any fue l with octane ratings lower than 87 AKI or 91
RON otherwise expensive engine damage will occur .
• Do
not use leaded gasoline. The use of leaded gasoline w ill
severe ly damage your vehicle's catalytic converter and its abi lity to
control exhaust emissions. •
Blended gasoline
Use of g aso line containing alco hol or M TB E ( meth yl
t er tiary butyl e ther )
You may use unleaded gasoline blended with alcohol or MTBE
(commonly referred to as oxygenates) if the blended mixture meets
the follow ing criteria:
Bl end of g asoline m eth anol (wood al coho l or methyl alc oh ol)
• Anti-knock index must be 87 AKI or higher .
• Blend must contain no more than 3% methanol.
• Blend must contain more than 2% co-solvents.
Vehicle care I t •

ll'IJ Alphabetical index
---=------------------------------------------------
Warning/indicator lights . .... . ... .. 22
Worn brake pads symbol . . . . . . . . . . . 35
B reak -in period . . . . . . . . . . . . . . . . . . . . . 271
Brake pads .. ...... .... ... ...... . 272
Tires .. .... ... .... .... ... .... ... 271
Bu lbs ..... ..... .... .... .... ....... 355
Bumper
cover
Caution when parking near a parking bar- rier or curb ...... ... .... .... ... 122
C
Ca lifornia Proposition 65 Warning ... .. 302
Battery specific . . . . . . . . . . . . . . . . . . 314
Capacities ....... ... .... .... ....... 369
Car care ....... ...... .... ... .... ... 282
Interior ......................... 289
Plastic and vinyl ...... ...... . .. .. 286
Weathers trips ...... ... .. ...... .. 287
Care of exterior .... ...... ... .... .... 282
Cargo area
See Loading the luggage compartment ..
201
Cargo net ..... ... .... .... ..... ...... 90
Catalytic converter . . . . . . . . . . . . . . . . . . 272
CD changer . . . . . . . . . . . . . . . . . . . . . . . . . 99
Centra l locking
Emergency locking .. ...... .. . .... . 50
Certification . . . . . . . . . . . . . . . . . . . . . . . 375
Changing a flat tire ...... .... .... ... 344
Changing a wheel . ... .... .... ....... 344
Changing engine oi l .. .... .... ...... . 306 Chassis
Undercoa ting . .... .... ...... ..... 288
See also Adaptive A ir Suspension .. . 184
CHECK button . . . . . . . . . . . . . . . . . . . . . . . 15
Check ing
Engine coolant level . ...... ....... 308
Checking tire pressure ....... ........ 323
Child restraints
Danger of using child restraints in the
front seat .... .... .... .... .... .. 217
What types of chi ld restraint anchors are
available? .... .... .... .... .... .. 251
Where can I get add itional informat ion
about chi ld restraints? ... .. .. .... 252
Child safety ...... ..... .. .... .. . 238, 243
Additional information . ........... 257
Booster seats . ... ... ....... ...... 246
Convertible chi ld safety seats .... .. 244
Convertible locking retractor . ...... 248
Guidance fixtures for lower anchorages
254
Important safety instructions for using chi ld safety seats .. . ......... ... 241
Important things to know when driving
with children ....... .... ... .. ... 238
Infant seats ... ... .... .... .... ... 243
Installing a child restraint using the
LATCH system . . . . . . . . . . . . . . . . . . 256
Lower anchorages ........ ... .... . 253
Mounting and releasing the anchorage hook .. ...... ........ .......... 257
Older children and safety belts ... .. 247
Saf ety bel ts and ol dler children ... .. 247
Teth er anchors .... .... ....... ... 257 Tether
strap ... .... .... ....... .. . 258
Which restraint sys tem should my older
chi ld wear? .......... .. .. .... .. 247
Child safety lock
rear doors (power) . .... .... .... ... . 51
Child safety seats .... .... .... .... ... 243
Conver tible locking re tractor .... ... 248
Danger of using child restraints in the
front seat ..................... . 217
How do I properly install a child safety
sea t in my vehicle? ...... ....... . 241
Installing .. .. .. .... ... .. .. .... ... 248
LATCH system . .... .... ... .... ... 256
Safety instructions .... .... .... ... 241
Cigarette lighter ........... .... ...... 97
Cleaning Alcantara (synthetic suede) .... ... . 292
Engine compartm ent ... ... .... ... 293
Fabrics and fabric cov erings ... .... 289
Ins trumen t panel .... ... ..... ... .. 290
Inte rio r ...... ....... ....... .. .. . 289
Leather ............. ....... .. ... 291
MMI display .. .. .. .... .... ...... . 289
MM I terminal . .... .... ... ... .. ... 289
Plastic and viny l ... .... .... .... ... 286
P lastic parts .... .. .... .... ....... 290
Safety belts . . . . . . . . . . . . . . . . . . . . . 293
Trim strips .. ...... .... ....... .. . 285
trim strips ...... ....... ...... .... 286
Cleaning and protection .......... ... 282
Climate control .. ... ...... ...... .... 102
Synchroni zing . .... ... ... ........ 104
Warm and cold ... .... ...... ... .. 102