2012 AUDI A8 service

Instruments and warning/indicator lights 2 7
Continue driving with reduced power (avoid­
ing sustained high speeds and/or rapid accel­
erat ions) and have the condition corrected.
Contact your author iz ed 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 improperly closed fuel fi ller cap may also
cause the MIL light to ill uminate ¢
page 217.
On-Board Diagnostics
Fig. 12 Loca tion of Data Li nk Connector (DLC)
On-Board Diagnostics monitors the compo­
nents of yo ur emission control system. Each
mon itored component in your engine system
has been assigned a code. In case of a ma l­
function, the component will be identified and the fault stored as a code in the contro l
module memory.
The MIL light may a lso illuminate if there is a
l eak in the on-board fue l vapor recovery sys­
tem. If the light illuminates after a ref uelling,
stop the veh icle and make sure the fue l filler
cap is properly closed ¢
page 217.
In order to make an accurate diagnosis, the
stored data can only be displayed using spe­
cial diagnostic equipment (gener ic scan tool
for OBD).
In order to connect the special diagnostic
eq uipment, push the plug into the Data Link
Connector (DLC). The DLC is located to the right of the hood release¢
fig. 12.
Your authorized Audi dea ler or a qualified
service station can interpret the code and per­
form the necessary repair.
A WARNING
Do not use the diagnostic connector for
personal use. Incorrect usage can cause
malfunctions, wh ich can increase the risk
of a collision!
Electronic speed limiter
-
Your vehicle may be factory equipped w ith
t ir es that are rated fo r 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 fai lure and loss of control if
the vehicle is operated at excessive speeds,
your vehicle a lso has an e lectronic speed limit­
er . The e lectronic speed limiter prevents your
vehicle from going faster than the tire speed rating . For more information ¢
page 246.
If the engine contro l unit receives faulty vehi­
cle road speed signa ls, the Ma lfunction Indi·
cator Lamp (MIL)
fllllij w ill illuminate. If this
occurs, contact the nearest authorized Audi
dealer for assistance .
A WARNING
-
Always observe the posted speed limits
and adjust your speed to suit prevailing road, traffic and weather conditions. Never
drive your vehicle faster than the maxi­
mum speed rating of the tires installed.

44 Clear vision
Highway light function* (vehicles with LED
headlights) -this function adapts the lighting
for highway driving based on vehicle speed.
.&_ WARNING
- Automatic headlights are only intended
to assist the driver. They do not relieve
the driver of his responsibility to check
the headlights and to turn them on man­
ually according to the current light and
visibility conditions. For example, fog
cannot be detected by the light sensors.
So always switch on the headlights §.0
under these weather conditions and
when driving in the dark.
- Crashes can happen when you cannot see the road ahead and when you cannot be
seen by other motorists. Always turn on
the headlights so that you can see ahead
and so that others can see your car from
the back.
- Please observe legal regulations when
using the lighting systems described.
(D Note
The rear fog lights should only be turned
on in accordance with traffic regulation, as
the lights are bright for following traffic.
@ Tips
- The light sensor* for automatic dynamic
headlight range control* is located in the
rear view mirror mount. You should
therefore not apply any stickers to the
windshield in this area in order to pre­
vent malfunctions or failures .
- In the event of a light sensor malfunc­
tion, the driver is notified in the instru­
ment cluster display¢
page 21 .
- You will hear a warning tone if you open
the driver door when the exterior lights
are switched on.
- In cool or damp weather, the inside of
the headlights, turn signals and tail
lights can fog over due to the tempera­
ture difference between the inside and
outside. They will clear shortly after switching them on. This does not affect
the service life of the lighting.
Emergency flasher
The emergency flasher makes other motorists
aware that you or your vehicle ore in an emer ­
gency situation.
,--~
,_'
. ;.' --- --~-.sc-
Fig. 35 Center console: emergency flasher switch
.,. Press the switch 11 ¢ fig. 35 to turn the
emergency flashers on or off .
When the emergency flasher is on, all four
turn signals blink at the same time. The turn
s ignal ind icator lights
ea in the instrument
cluster, as well as the light in the emergency
flasher switch
11 blink likewise. The emergen­
cy flasher also works when the ignition is
turned off.
The emergency flashers will turn on automati­
cally if you are in an accident where the airbag
has deployed.
(D Tips
You should turn on the emergency flashers
when:
- you are the last vehicle standing in a traf­
fic jam so that any other vehicles coming
can see you, or when
- your vehicle has broken down or you are
in an emergency situation, or when
-your vehicle is being towed by a tow
truck or if you are towing another vehicle
behind you.

50 Clear vis ion
Replacing windshield wiper blades
Wiper blades in good condition help keep the
windshield clear .
Fig. 45 Remov ing wi nds hield w ipe r blade s
Service p osition
"" Switch the w indshield wipe rs off (posit io n
@ ¢ page 48, fig . 44).
"" Se lect in the M MI:: !CAR !f unc tion button>
Car system s contro l button > Se rvicing &
checks > Wip er service position > On . The
windshield wipers move into the serv ice po­
s it ion.
O r
"" Switc h the ignition off and move the wind­
shield wiper lever to posit ion © ¢ page 48,
fig.
44.
Removing the wiper blade
"" Fold the windshield wiper arm away from
the windshie ld .
"" Press the locking knob
(D ¢ fig . 45 on the
wiper blade . Hold the wiper b lade firm ly.
"" Remove the w iper blade in the direction of
the arrow.
Installing th e wiper blade
"" Inse rt the new wiper b lade into the mount
on the wiper arm @until you hea r it latch
into place .
"" Place the wiper arm back on the windshie ld.
"" Switc h the ignition on .
"" Se lect : ICARI funct ion button >
Car sy stem s
control button > Servicing & checks > Wiper
servic e po sition
> Off .
Or
"" Press the w indshield wiper lever .
A WARNING
-If the windshie ld w ipers smear the wind­
sh ie ld, clean the wiper b lades w ith wind­
shie ld washer fluid .
If the wiper blades
are ext reme ly dirty, you can a lso clea n
them wi th a s oft sponge o r clo th.
- For your safety, you should replace the
wiper blades once o r twice a yea r. See
your author ized A udi de aler for re place­
men t blad es.
([) Note
-The windshield wip er b lades must only
be folded away when in the service pos i­
ti on! Ot herwise, you ris k damaging the
p aint on the hood o r th e windshie ld w ip­
er motor.
- Yo u should no t move your veh icle or
press the windsh ie ld wiper lever when
t he wipe r arms are folded away from the
w indshield. The windshie ld wipers wou ld
move back into their or iginal position
and co uld damage the hood and wind­
shield.
- To help prevent damage to the w iper sys­
tem, always loosen blades wh ich are fro­
zen to the windshield before operating
w ipers .
- To help prevent damage t o wiper blades,
do not use gasoline, kerosene, paint
thinne r, or o ther solven ts on o r near the
w iper blades .
- To help prevent damage to the w iper
arms or other components, do not at­
tempt to move the wipe rs by hand .
(j) Tips
- Comme rcial hot waxes appl ied by a uto­
matic ca r washes affect the cleanability
of t he windshie ld.
- Yo u can also use the se rv ice posi tion, for
example, if yo u want to p rotec t the
w indshield from icing by using a cover.
- Yo u cannot activate the se rv ice position
w hen the hood is ope n.

Warm and cold Climate controls
Description
The climate control system warms, cools and
adds humidity to the a ir in the veh icle inter io r.
It is the most effect ive when the windows and
sunroof* are closed. If the temperature inside
the parked vehicle becomes very warm, open­
ing the window briefly will speed up the cool­
ing process.
I n all heating mode functions except
defrost,
the blower on ly switches to a higher speed
once the engine coolant has r eached a certain
temperature.
Condensation from the cooling system can
drip and form a puddle of water under the ve­hicle. This is normal and does not mean there
is a leak.
Pollut ant filter
The po llutant filte r removes pollutants s uch
as dust and pollen from the air.
The air pollutants filte r must be changed at
the intervals spec ified in you r Wa rra nty
&
Maintenance book let, so that the air condi­
tioner can properly work.
I f you drive you r vehicle in an area with h igh
ai r po llution , the fi lter may need to be
changed more freq uent ly than specified in
your Aud i Warranty
& Ma intenance booklet. If
i n doubt, ask your authorized Audi Service Ad­
visor for advice .
K ey coded settings
The climate con trol settings are a utomat ica lly
stored and assigned to the remote contro l key
that is in use .
& WARNING
Reduced visibility is dangero us and can
cause accidents . -
Warm and cold 75
- For safe driving it is very important that
all windows be free of ice, snow and con­
densat ion.
- Comp letely fam iliarize yourse lf with the
proper use and funct ion of the heat ing
and ve nti lation system and especially
how to defog and defrost the w indows.
- Never use the windshield wiper/washer
system in freez ing weather unt il you
have warmed the w indshield first, using
the heating and ventilation system . The
washer solution may free ze o n the wind­
shie ld and red uce visib ility.
(D Note
- If you suspect that the air conditioner has been damaged, switch the system
off to avoid furt her damage and have it
i n spected by a q ua lified dea lership.
- Repairs to the Audi air conditioner re­
quire specia l techni cal know ledge and
special tools. Contact an autho rized Aud i
dealer fo r ass istance.
@ For the sake of the environment
By reduci ng the amou nt of f uel you use,
you also red uce the amount of pollutan ts
emitted into the air .
(D Tips
- Keep the air intake s lots ( in fro nt of the
w indshield) free from ice, snow and de­
br is in order to maintain the proper f unc ­
tion of the climate control system.
- T he energy management system may
switch the seat heating* or rear window
defroster off temporar i Ly . These systems
are available again as soon as the energy
balance has been restored .
- Air escapes through vents under the rear
window. When placing items of clothing
on the luggage compartment cover, en­
sure that the openings are not covered.

88 Audi adapti ve cruise control and bra king gu ard
vehicles or obstacles that are not moving
can trigger a collision warning and if con­
firmed by the v ideo camera, an acute col­
lis ion warn ing .
- For safety reasons, do not use adaptive
cruise co ntrol when driving on roads with
many curves, when the road surface is in
poor condit ion and/or in bad weather
(such as ice, fog, gravel, heavy rain and
hydroplan ing) . Using the system under
these cond it ions cou ld result in a co lli ­
sion .
- Swi tch adap tive c ruise control off tempo­
rar ily when driv ing in turning lanes, on
expressway exits or in construction
zones . This prevents the vehicle from ac­
celerat ing to the set speed when in these
situations.
- The adapt ive cruise control system wi ll
not brake by itse lf if you put your foot on
the accelerator pedal. Doing so can over­
ride the speed and d istance regulation .
- When approaching stationary objects such as stopped traff ic, adaptive cruise
co ntrol will not respond and braking
guard w ill have limited function.
- The adapt ive cruise control system and
braking guard do not react to people, an­
imals, objects c rossing the road or on­
coming objects .
- The function of the radar senso rs can be
affected by reflective objects such as
guard rai ls , the entrance to a tunnel,
heavy rain or ice.
- Never follow a ve hicle so closely that you
cannot stop your vehicle safe ly. The
adaptive cruise contro l canno t slow or
brake the vehicle safely when you follow
another vehicle too closely. Always re­
member that the automatic braking
function cannot br ing the vehicle to a
sudden or emergency stop under these condit ions.
- To prevent unintended operation, always switch ACC off when it is not being used. (D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. That cou ld affect the adaptive
cruise control system and brak ing guard.
Have your authorized Aud i dea ler or au ­
thorized Audi Service Facility check their
funct ion .
In curves
Applies to vehicles: with Audi adaptive cru ise contro l
I
Fig. 87 Ex ampl e: dri ving in to a curve
When d riving into a curve c> fig. 87 and out of
a curve, the ad aptive cruise control may react
to a vehicle in the next lane and apply the
brakes. You can override or prevent the brak­
i ng by pressing the acce lerator pedal b riefly .
' Stationary objects
Applies to vehicles: with Audi adaptive cruise control
Fig. 88 Exampl e: objec t ch anging l anes and sta tio nar y
object
T he adaptive cru ise control system only reacts
to objects that a re mov ing o r that the system
has already detected as moving . For examp le,
if a vehicle @, which has already been detect-
ed by the adaptive c ruise contro l, tu rns off o r
ch anges lane and ano ther stationary veh icle .,.

94 Audi adap tive cruise control and br aking guard
stopped vehicle or stationary obstacle
(end of a traffic jam or veh icle that has
broken down in traffic).
- Always remember that the radar sensor
for the Audi braking guard works only
within defined detection and range limits
that may prevent the proper detection of
other vehicles .
- The radar sensor's function and range
can be reduced by rain, snow and heavy
spray. Moving vehicles up ahead may not
be promptly detected or may not be de­
tected at al l.
- Reflective surfaces includ ing crash barri­
ers or tunnel entrances may impair the
func tion of the radar sensor.
{D) Tips
- You can cancel the braking w ith increas­
i ng force that is initiated by the system
by braking yo urself, by accelerating no­
ticeab ly or by swerving.
- Audi braking guard error messages
¢page 94.
- Keep in mind that braking gua rd can
brake u nexpectedly. Always secure any
ca rgo or objec ts th at yo u are transport­
i ng to reduce the risk of damage or in­
ju ry.
Settings in the MMI
Applies to vehicles: with Audi adaptive cruise co ntrol
.. Se lect: I CARI function button > Ca r sys tem s
control button > Drive r assist > Audi b rak­
ing guard .
System -
Switch Audi braking g uard On and
Off . When you switch the ignition on, the
message
Aud i braking gua rd off appears if
the system is switched off.
Ea rly warnin g -The distance and approach
warn ings in the display can be switched
On /
Off .
(D Tips
- Your settings are automatically stored
and ass igned to the remote control key being used at the times the settings are
made.
- If you switch the ESC to sport mode, A u­
di braking gua rd switc hes off a utomat i­
cally r=:>page
189.
- Switch A udi braking guard off when you
are loading the vehicle onto a vehicle car­
rier, train, ship or other type of transpor­
tat ion. This can prevent undesired warn­
ings from the braking guard system.
Messages
Applies to vehicles: with Aud i adaptive cru ise contro l
ACC unavailable
ACC and b raking gua rd: unavailable
T he system cannot detect moving vehicles up
ahead correctly and is switched off. The sen­
sors have been displaced or a re not working
proper ly . The Audi pre sense functions may a l­
so be affected. Drive to your authorized Audi
dealer or authorized A udi service facility im­
med iate ly to have the malfunction corrected.
ACC: unavaila ble at thi s time. No sen sor vi­
sion
ACC and braking guide: un ava ilabl e at thi s
time . No s ensor vi sion
Th is message appears if the sensor v iew is ob­
structed, for examp le by leaves, snow, heavy
spray o r d irt. Clean the sensors
r=;, page 87,
fig. 86 .
ACC: unavailabl e at this time. Inclin e too
s teep
The road exceeds the max imum possible an­
gle for proper adaptive cru ise control opera­
t ion. Adaptive cru ise cont rol is switched off.
ACC: only selector lever pos itions D , S or M
available
Se lect the D, Sor M selector lever position .
ACC: un available at thi s time . Parking brake
s et
T he adapt ive cru ise control system switches
off au tomatically if the par king b rake is set. .,.

-Improper reliance on the side assist sys­
tem can cause collisions and serious
personal injury:
- Never rely only on side assist when
changing lanes.
- Always check rear view mirrors to make
sure that it is safe to change lanes.
- Side assist cannot detect all vehicles un­
der all conditions- danger of accident!
- Please note that side assist indicates
there are approaching vehicles, or vehi­ cles in your blind spot, only after your ve­
hicle has reached a driving speed of at
least 19 mph (30 km/h).
- In certain situations, the system may not
function or its function may be limited.
For example:
- if vehicles are approaching or being left
behind very quickly. The display may
not turn on in time.
- in poor weather conditions such as
heavy rain, snow or heavy mist .
- on very wide lanes, in tight curves or if
there is a rise in the road surface . Vehi­
cles in the adjacent lane may not be de­
tected because they are outside of the
sensor range.
(D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. This can affect the system .
Have your authorized Audi dealer or au­
thorized Audi Service Facility check their
function.
(D Tips
- If the window glass in the driver's door
or front passenger's door has been tint­
ed, the display in the exterior mirror may be misinterpreted.
- For Declaration of Compliance to United
States FCC and Industry Canada regula­
tions
c::>page 283.
Audi side assist 101
Activating and deactivating
Applies to vehicles: m it s ide ass ist
Fig. 105 Driver 's doo r: Side ass ist button
.,. Press the c::> A in General information on
page 100
button to switch the system on/
off . The LED in the button turns on when
side assist is switched on.
Adjusting the display brightness
App lies to vehicles: wit h side assist
The brightness setting can be adjusted via the
MMI.
.,. Select: I CAR I function button > Car systems
control button
> Driver assist > Audi side
assist .
The display brightness adjusts automatically
to the brightness of the surroundings, both in
the information and in the warning stage . In
very dark or very bright surroundings, the dis­
play is already set to the minimum or maxi­
mum level by the automatic adjustment. In
such cases, you may notice no change when
adjusting the brightness, or the change may
only be noticeable once the surroundings
change.
Adjust the brightness to a level where the dis­
play in the information stage will not disrupt
your view forward.
If you change the bright­
ness, the display in the exterior mirror will
briefly show the brightness leve l in the infor­
mation stage. The brightness of the warning
stage is linked to the brightness in the infor­
mation stage and is adjusted along with the
information stage adjustment .

140 Safety belts
The s houl der belt should lie as close to the
center of the collar bone as possib le and
should fit well on the body¢
A in Safety belt
position on page 138.
P ower safety belt h eight adju stment *
You can ad just the height of the safety belts
using the mu ltifunction button on the driver
or front passenge r seat ¢
page 56.
A WARNING
Always read and heed all WARNINGS and
other important informat ion
¢page 137.
You can also adjust the height of the front
seats to change the position of the safety
be lts.
Improperly worn safety belts
Incorrectly positioned safety belts can cause
severe injuries.
Wear ing safety be lts imprope rly can cause se ­
rio us inj ury or death. Safety be lts can on ly
wo rk when they are correct ly positioned on
the body. Improper seating positions reduce
the effect iveness of safety belts and will even
increase the r isk of injury and death by mov­
ing the safety belt to cr itical areas of the
body. Imprope r seat ing pos it ions also in­
crease the risk of serio us in jury and death
when an air bag deploys and str ikes a n occu­
pant who is not in the correct seating posi­
tion . A d river is responsib le for the sa fety of
all vehicle occupants and especially for chi l­
dren. Therefore:
~ Never permit anyone to ass ume an incorrect
sitting position in the veh icle w hile traveling
¢&_ .
A WARNING
Imprope rly worn safety belts increase the
r isk of serious personal injury and death
whenever a veh icle is being used. -
Always make sure that all vehicle occu­
pants are co rrectly restrained and stay in
a correct seating position whenever the
veh icle is being used .
- Always read and heed all WAR NINGS and
other important information
¢ page 137.
Safety belt preten­
sioners
How safety belt pretensioners work
In front, side and rear -end collisions above a
particular severity and in a rollover , safety
belts are tensioned automatically.
Reversible safety belt tensioners
T he safety belts on the fro nt sea ts ar e e qui p­
ped with powe r reversib le tensioners . The fo l­
lowing functions a re ava ila bl e when the driv­
er's/front passenger's safety belts are fas­
tened :
- Automatic tens ioners : at the star t of a drive,
the safety belts automat ica lly adjust to the
passe nger afte r a certain time period or ve ­
hicle speed. To switch the automatic ten­
sioners off, select the following in the MMI:
! CARI function button> Car systems > Vehi­
cle settings > Seats > Driver's seat or Pas­
s enger's seat
> Automatic belt t ensioner >
Off .
-In certain dr iv ing s ituations, the safety belts
may tighten w ith a revers ible tens ion ing
fu nction
¢ page 185.
-The safety be lts may a lso t ighten with th is
reve rsible tensioning function in minor co lli­
sion s.
Pyrotechnic safety belt pretensioners
The safety belts are equ ipped with safety belt
pre tensioners . The system is act ivated by se n­
sors i n front, s ide and rear-end co llisions of
great severity and in a rollover. This tig htens
t h e belt and t akes up belt slack¢.&.
in Service
and disposal of safety belt pretensi oner on
page 141.
Taking up the slack helps to reduce 1111>