2018 AUDI A8 fuel

System settings
sound di stribu tion)/ Driver (sound dis tribution
aime d towa rd the d river) or
All /Front /Rear.
- Surround level* :
you can a dju st the vo lume of
t h e sur round effect by tu rning the contro l
k no b.
-AudioPilot (dynamic road noise compensa­
tion)* :
select and confirm Active /Inactive.
When t he f unct io n is act ive, the vo lume is auto ­
matically ad justed depending on t he leve l o f
noise ins ide the ve hicle.
- Sound focus * (adjusting the sound distribu­
tion ):
select and confi rm All (symmet rical
sound d istr ibutio n)/ Movie (optima l so und dis­
tribution fo r playing a
movie)/ Front/Rear .
- Volume balancing *:
the dynamic road noise
compensation ca n be ad justed by turning the
contro l knob.
@ Subwoofer* I @ Bass/ @Treble
You can a djust the Subwoofer *, Bass and Treble
sett ings by turning the contro l kno b. The
cha nged settings only apply fo r the aud io so urce
that is active at the t ime . This allows you to ad­
jus t th e sound se tt in gs for eac h aud io so urce sep­
ara tely.
® Balance/Fader (sound focus)
- Adjusting the sound distribution using the
MMI touch :
move your finger on the MMI t ouch
contro l pane l in the des ired d irec tion.
Adjusting the system
volume
.,. Se le ct: the IMENU ! butto n> Tone .
Navigation* control button
Voice guidance volume /Music volume during
nav. prompts:
vol ume o f navigation prompts
d ur ing ac tive ro ute g uidance . Mu sic volume dur­
i n g nav iga tion prom pts mea ns tha t th e vol ume
of audio playb ack is te m porar ily lowered whe n
t he p arkin g sys tem or v oic e gu idance i s act ive.
Voice guidance: se e ¢page 175.
Voice guidance during call : see ¢ page 175.
206
Telephone* control button
Ringtone volume /Phone call volume :
you ca n
adjus t the sele cte d r ing tone vo lume or call vol ­
u me by tu rnin g the cont ro l knob. The
Phone call
volume
can on ly be adjusted durin g a call.
Systems control button
Speech dialog system volume :
you can adju st
th e vol ume o f th e ann ounc emen ts by tur ning the
contro l kno b.
MMI touch volume *: the vo lu m e of the MM I
tou ch pro mpts can be adjus ted by tur ning the
c on tro l k no b.
Other settings
.,. Sele ct: th e I M ENU I button > MMI setup contro l
bu tton.
Language
The language can be changed fo r the Info ta in­
men t display, t he dr iver i nfo rm ation system dis­
play, voice guid ance* and t he voice recogn itio n
sys te m* .
En glish, French and Spanish are ava ila bl e.
Measurement units
The following meas urement u nits ca n be set in
the Infotainment d isp lay a nd dr iver info rmat ion
system.
- Speed (mph o r km/ h)
- Distance (miles o r kilomete rs)
- Temperature (°For 0
( )
-Fuel consumption (l/l0 0km, mpg (US), mpg
(U K) or k m/l)
- Volume (lite rs, ga llons ( UK) o r gallo ns (US))
Speech dialog system
App lies to : vehicles wi th voice recog nitio n syste m
Display speech commands : th e d isplay of poss i­
ble commands dur ing vo ice input can be switc h­
ed
On or Off .
Short dialog :
prompts in a s horter format can be
switc hed
On or Off .
Input signal :
the beep input signa l dur ing a dia-
l og can be switc hed
On or Off. ..,.

Checking and Filling
Checking and Filling
Gasoline
Fuel supply
Applies to: vehicles with gasoline engine
Using the right fuel helps keep the environment
clean and prevents engine damage .
Fuel recommendation
The fuel recommended for your vehicle is unlead­
ed premium
grade gasoline . Audi recommends
using TOP TIER Detergent Gasoline with a mini­
mum octane rating of91 AKI (95 RON). For more
information on TOP TIER Detergent Gasoline,
please go to the offic ial website
(www.toptiergas .com).
The recommended gasoline octane rat ing for
your engine can also be found on a label located
on the ins ide of the fuel filler flap. This rating
may be specified as AK I or RON .
Your veh icle may also be operated using unlead­
ed regular gasoline with a minimum octane rat ­
ing of 87 AKl/91 RON . However, using 87 AKI/91
RON octane fuel w ill slightly reduce engine per­
formance.
Use unleaded gasoline only. Unleaded gasoline
is available throughout the USA, Canada, and in
most European countries. We recommend that
you do not take your vehicle to areas or count ries
where un leaded gasoline may not be available.
For more information on refueling your vehicle,
see
~ page 269 .
Octane rating
Octane rating indicates a gasoline's ability to re­
sist engine damaging "knock" caused by prema­
ture ignit ion and detonation . T herefore, buy ing
the correct grade of gasoline is very important to
he lp prevent possible engine damage and a loss
of eng ine pe rformance.
Gasoline most commonly used in the United
States and Canada has the following octane rat­
ings that can usually be found on the filler pump:
- Premium Grade: 91 - 96 AKI
268
-Regular Grade: 87 -90 AK I
Explanation of the abbreviations :
AKI =
Anti Knock Index = (R +M)/2 = (RON +MON)/
2
RON = Research Octane Number
MON= Motor Octane Number.
@ Note
- Do not us e any fuel with octane ratings low­
er than 87 AKI or 91 RON otherwise expen­
sive engine damage will occur .
- Do
not us e leaded gasoline. The use of lead­
ed gasoline will severely damage your vehi ­
cle's catalytic converter and its ability to
contro l exhaust emissions .
Blended gasoline
Applies to: vehicles with gasoline engine
Use of gasoline containing alcohol or MTBE
(methyl tertiary butyl ether)
You may use unleaded gasoline blended with al­
cohol or MTBE (commonly referred to as oxygen ­
ates) if the blended mixture meets the follow ing
criteria :
Blend of gasoline methanol (wood alcohol or
methyl alcohol)
-Anti -knock index must be 87 AKI or higher.
- Blend must contain no more than 3% metha-
nol.
- Blend must contain more than 2% co-solvents.
Blend of gasoline and ethanol (grain alcohol or
ethyl alcohol)
- Anti-knock index must be 87 AKI or h igher .
- Blend must not conta in more than 15% etha-
nol.
Blend of gasoline and MTBE
-Anti -knock index must be 87 AK I or h igher.
- Blend must not contain more th an 15% MTBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform es­
pecially well for winter or summer dr iv ing . Dur-
i ng seasonal change-over, we suggest that you
IJIJ,

u. co .... N
" N .... 0 0 :c ' fill up at busy gas stations where the seasona l
adjustment is more like ly to be made in time .
@ Note
-Methanol f uels whi ch do not meet these re ­
quirements may ca use corrosion and dam­
age to plastic and rubber components in the
fuel system .
- Do not use fuels that fai l to meet the speci ­
fied criteria in this c hapter.
- If you are unable to determine whether or not a particular fue l blend meets the speci ­
fications, ask your service station or its fuel
supplier.
- Do not use fuel for which the contents can­
not be identif ied.
- Fuel system damage and performance prob ­
l ems resulting from the use of fue ls differ­
ent from those specif ied are not the respon­
s ibility of Audi and are not covered under
the New Veh icle or the Emiss ion Control
System Warrant ies .
- If you experience a loss of fue l economy or
driveability and performance problems due
to the use of one of these fuel blends, we
r ecommend that you switch to unblended
fuel.
Gasoline additives
Applies to: vehicles with gasoline engine
A majo r concern among many auto manufactur ­
ers is carbon deposit build-up caused by the type
of gasoline you use.
A lthough gasoline grades d iffer from one manu­
facturer to another, they have cer tain things in
common . A ll gasoline grades contain substances
that can cause deposits to collect on vita l engine
parts, such as fue l injectors and intake valves . A l­
though most gasoline brands include additives to keep engine and fuel systems clean, they are not
equally effective.
Audi recommends using TOP TIER Detergent Gas­
oline. For more informat ion on TOP TIER Deter­
gent Gasoline, please go to the official website (www .toptiergas .com) .
Check ing and F illing
A fter an extended period of using inadequate
fuels, carbon deposit bui ld-ups can rob your en ­
gine of peak performance.
@ Note
Damage or ma lf u nction due to poor fue l qual ­
ity is not covered by the A udi New Vehicle
L imited Warranty .
Refueling
Fuel filler neck
The fue l filler neck is located on the rig ht rea r
s ide panel behind the fuel fille r flap .
If the power lock ing system should fa il, yo u can
st ill open the flap manually - fo r detailed instruc­
tions see
~page 271.
You can find the fuel tank capacity of your vehicle
i n
~ page 334 .
The label on the inside of the fuel filler flap tells
you the correct fuel for your vehicle. For more in­
format ion about fuel spec ificat ions, see
~ page 268 .
Your vehicle fuel tank has an onboard refuelling
vapor recovery system. T his feature helps to pre­
vent fuel vapors from escaping from the tank and polluting the environment wh ile you refuel your
vehicle. In o rder to fill the tank proper ly w hile
prote ct ing t he env ironment, p lease follow t his
r ef uel ing p rocedure carefully.
& WARNING
= -
Unde r normal opera ting condi tions, neve r ca r­
r y additional f uel containers in your car. Gas
canisters and other containers used to trans ­
port fue l can be dangerous. Such containers,
f u ll or empty, may leak and could cause a fire
i n a collision. If you must transport fuel to
use for your lawn mower, snow blower, etc.,
be ve ry ca refu l and always observe loca l a nd
state laws rega rding the use, transpo rta tion
a nd stor age of su ch f uel con tainers. Make cer ­
t ai n t he co nta iner meets indus try standards
(A NSI/AS TM F8S2 - 86) .
269

Checking and Filling
(D Note
Never drive your vehicle until the fuel tank is
completely empty. The irregular supply of
fuel can cause m isfiring. Gasoline cou ld enter
the exhaust system and damage the catalyt ic
converter.
Fueling procedure
Fig. 252 Right re ar side of the vehicle: open ing the fue l
filler door
F ig. 253 Fue l filler doo r w it h attac hed fuel cap
The f uel fi ller door is unlocked or locked by the
central lock ing system.
Opening the fuel cap
• Presson the left s ide of the fuel filler door to
open
¢ fig . 252 .
• Unscrew the tank cap counterclockw ise.
• Place the cap from above on the open fue l filler
door
¢ fig. 253.
Clo sing th e fu el cap
• Screw the tank cap on to the r ight on the filler
neck until it cannot turn any farther .
• Close the fuel filler door and then press on the
left side until it latches.
270
Once the pump nozzle switches off, the fuel tank
is "full". Do not fill the tank more. Otherwise the
expans ion space in the tank w ill be filled.
The correct fuel type for your vehicle can be
fo und on a label located on the inside of the fuel
filler door . For additional information on fuel,
see ¢
pag e 268.
The fuel tank capacity of your veh icle is listed in
the
T echn ical Dat a section ¢ page 334.
To avo id fuel spilling or evaporat ing from the fuel
tank always close fue l cap prope rly and com­
plete ly. An improper ly closed f uel fi ller cap may
also cause the M IL lamp ¢
page 25 to come on.
A WARNING
Not pay ing attention when fueling or han ­
dling fuel incorrectly can lead to fires, explo­
sions or serious injur ies.
- Fue l ignites easily and can cause serious
burns and other injur ies.
-
- If you do not switch the engine off when fu­
eling and/or do not insert the fuel nozzle
completely into the tank open ing, fuel can
leak out or run over. Leaked fuel can ignite
and start a fire .
- Do not use the telephone while fueling . The
electromagnetic rays can cause sparks,
which can ignite fuel vapors and start a fire .
- Do not sit in your vehicle wh ile fueling. If
you must make an exception and enter your
veh icle again while fueling, close the door
a nd touch metal to d ischa rge stat ic elect ric­
ity before to uching the f uel no zz le. Static
e lec tricity ca n create spa rks, which ca n ig ­
n ite vapors when fueling.
- Do not smoke or have an open flame in the
a rea whe n fue lin g you r veh icle or filling a
fue l container because this increases the
risk of an explosion.
- F or your safety, carrying fuel containe rs in
your veh icle is not recommended . Whet her
fu ll or empty, the container can leak and
cause a fire in the event of an accident.
- If you must make an exception and trans­
port a fuel container, note the fo llowing:

lL t:0 ....
"' ......
"' .... 0 0 :c ' -Never f ill the fuel container with fuel
while it is in or on the vehicle. Stat ic elec­
tr icity is discharged when filling which can
cause the fuel vapors to ignite and in­
creases the r isk of an explos ion.
- Always p lace a fuel container on the
ground before fi lling.
- Always hold the fuel nozzle comp letely in
the fuel container when f il li ng .
- If the fuel container is made of metal, the
fuel nozzle must always be in contact with the conta iner when filling it w ith fuel. Th is
prevents static electr ic ity from discharg­
ing.
- Never sp ill fuel in the veh icle or the lug­
gage compartment. Evaporated fue l is ex­
p losive and increases the risk of serio us in­
jury or dea th.
- Follow legal requir ements when using,
sto ring and transpor ting fue l contai ners .
- M ake sure the fuel conta iner confo rms to
i nd ust ry st anda rds (ANSI/AS TM F852 -86).
(D Note
- Remove spilled fuel from vehicle paint im­
mediate ly, because it can damage paint.
- Never dr ive unti l th e fuel tank is comp letely
empty . The ir regular supply of fuel that re­
su lts from that ca n caus e engine misfires.
U ncomb usted fuel w ill enter the exha ust
system a nd i ncre ase the risk of damage to
the c atalyt ic converter.
@) For the sake of the environment
Do not overfi ll the fuel tank , othe rw ise fue l
can leak out whe n the vehicle is warm ing up.
(D Tips
The f uel f iller door on your vehicle does not
loc k if you lock the vehicle from the inside.
Chec king and Filling
Fuel filler door emergency release
If the central locking system is faulty, the fuel
filler door can be unlocked manually.
F ig . 25 4 Veh icles w it h se lect ive catalyt ic reduct io n•: right
side trim pa nel in t he luggage compa rtme nt
Fi g. 25 5 Righ t sid e tr im pa nel in t he luggage compart·
ment : emergency release mechanism
T he emergency release mechanism is located be­
hind the rig ht side trim pane l in the luggage
compartment . In vehicles with se lective cata lytic
reduction*, remove the vent grille f irst:
.,. Press bo th tabs @¢fig. 254 an d tilt the vent
grilled downward. Yo u can then remove the
grille upwar d .
.,. Loosen the loop¢ fig. 255 from the retainer
and then pull on the loop caref ully
¢ (D . The
fi ller door is released.
.,. Press on t he left side of the fue l filler door to
open
it ¢ page 2 70, fig . 252.
~ Note
Only p ull on the loop until yo u feel resista nce.
You w ill not hear it re lease. Othe rw ise you
could damag e the emergency rel ease mecha­
n ism.
271

Checking and Filling
Emissions control
systems
Catalytic converter
A pp lies to: ve hicles w ith gasoline engines
The vehicle may on ly be driven with unleaded
gasoline, otherwise the catalyt ic converter will be
destroyed.
Never d rive until the tank is comp letely empty .
The irregular supp ly of f uel that results from that
can cause engine m isfires. Uncombusted fuel will
enter the exhaust system , w hich can cause over­
heating and damage to the catalyt ic converter .
A WARNING
The temperature o f the exha ust system is
hig h, bo th whe n driving and after stopping
t he engine.
-
- Never touch the exha ust ta il pi pes once they
h ave become ho t. This could resul t in burns.
- Do no t park you r vehicle ove r flammable
m aterials such as g rass or leaves because
t h e hi gh te mperat ure of the emiss io ns con­
t rol sys te m c ould star t a fire.
- D o no t apply u nder bod y p rote ctant in the
exha ust syste m are a, bec au se t his in cre ases
t h e ris k of fire .
Engine compartment
Working in the engine compartment
Special core is required if you ore working in the
engine comportment
For work in the engine compartment such as
checking and filling fluids, there is a risk of in­
jury , scalding , accidents, and burns . For this
reason, follow all the warnings and general
safety precautions provided in the following in­
formation . The engine compartment is a dan ­
gerous area on the vehicle .
~ ,&..
A WARNING
- T urn the engine off.
- Switch the ign ition off .
- Set the parking b rake .
- Select the P selector leve r pos ition.
272
- Let the eng ine cool down .
- Never open the hood when there is steam o r
coo lant escapin g from the engine compart­
ment, because there is a risk that yo u could
be burned. Wait unt il no steam or coolant is
escaping.
- Keep children away from the eng ine com­
pa rtment.
- Never sp ill fluids on a hot engine. These flu­
ids (such as the anti-freezing agent con­
tained in the coolant) can ignite .
- Avoid short c ircuits in the electrical system.
- When working in the engine compa rtment,
remember that the radiator fan can switch
on even if the ignition is switched off, wh ich
increases the r isk of persona l injury.
- Never open the cap on the coolant expan­
sion tank when the engine is warm. The
cooli ng system is under p ressure .
- To protect your face, hands, and a rms from
hot steam or coolant, cover the cap with a
large cloth when opening.
- Do not remove the engine cove r under any
circumstances . T his increases the risk of
burns.
- If tests need to be perfo rmed with the en­
gine running, there is add itiona l danger due
to mov ing components (such as the r ibbed
be lt, alterna tor and rad iator fan) and from
the high-voltage ignition system.
- Do not unde r any circ ums tances activate the
throttle inadvertently (for example, by hand
from t he e ngine compartment) if the veh i­
cle is stat ionary but the en gine is r un ning
an d a gea r is en gaged. Otherwise, the veh i­
cle will start to move immediately and this
could result in an acc ident .
- Pay a ttent ion to the following wa rnings lis t­
e d w hen wor k on the fue l system o r on the
electrical equipment is require d.
- Do no t smoke.
- Never work near open flames .
- Always have a working fire extinguisher
nearby.
- All work on the battery or elect rical system
in your vehicle can result in injuries, chemi ­
cal b urns, acc idents or bu rns. Because o f
this, all work m ust be perfo rmed
only b y an ~

u. co ..... N
" N ..... 0 0 :c ' & WARNING
Read and follow all WARNINGS before check­
ing anything in the engine
compartment~ .&.
in Working in the engine compartment on
page 272.
Engine oil
If the engine oil level is too low
If you need to add engine oil, use an oil that is listed on the sticker.
The sticker is located at the
front of the engine
compartment ~ page 274,
fig.
258.
If the recommended engine oil is not available,
in an emergency you may add a maximum of 1
quart
(I liter) of ACEA C3 or API SN engine oil
one time until the next oil change.
For more information on the correct engine oil
for your vehicle, contact an authorized Audi deal­
er or authorized Audi Service Facility. Have the oil
changed by an authorized Audi dealer or author­ ized Service Facility.
Audi recommends
«;;castrol I /g@@g PrtfTr.:!\.7.Tri,'lAl.
Audi recommends using the Longlife high-per·
formance engine oil from Audi Genuine Parts.
Checking the engine oil level
The engine oil level can be checked in the Info­
tainment system
Observe the safety precautions ~ A in Working
in the engine compartment on page 2 72.
~ Park your vehicle on a level surface.
~ Shut the engine off when it is warm.
~ Switch only the ignition back on.
~ Wait approximately two minutes.
~ Select: the ICARI function button> (Car)* Sys­
tems
control button > Service & control > Oil
level.
~ Read the oil level in the Infotainment system .
Add engine oil if the bar in the oil level indica­
tor is just before
"min"~ page 2 76.
Checking and Filling
@ Note
The engine oil level must not be under the
"min" marking, as this will increase the risk of
engine damage.
(D Tips
The oil level indicator in the display is only an
informational display.
If the oil level is too
low, a minimum oil warning appears in the in­
strument cluster. Add oil and close the hood.
The current oil level is displayed in the Info­
tainment system the next time the ignition is
switched on.
(D Tips
The engine oil consumption may be up to
0.5 quart/600 miles (0 .5 liter/1,000 km), de­
pending on driving style and operating condi­
tions. Consumption may be higher during the
first 3,000 miles (5,000 km). Because of this,
the engine oil level must be checked regular­
ly. It is best to check each time you refuel
your vehicle and before long drives.
- In order to provide effective lubrication and
cooling of internal engine components, all
internal combustion engines consume acer­
tain amount of oil. Oil consumption varies
from engine to engine and may change sig­
nificantly over the life of the engine. Typi­
cally, engines with a specified break-in peri­
od consume more oil during the break-in pe­
riod than they consume after oil consump­
tion has stabilized.
- Under normal conditions, the rate of oil
consumption depends on the quality and
viscosity of the oil, the RPM (revolutions per
minute) at which the engine is operated, the
ambient temperature and road conditions.
Further factors are the amount of oil dilu­
tion from water condensation or fuel resi­
due and the oxidation level of the oil. As any
engine is subject to wear as mileage builds
up, the oil consumption may increase over
time until replacement of worn components
may become necessary.
.,.
275

u. a:, .... N
" N .... 0
0
I Wheels
Wheels and Tires
General information
~check your tires regularly for
damage (punctures, cuts, cracks
and bulges). Remove foreign ob­
jects from the tire tread.
~ If driving over curbs or similar
obstacles, drive slowly and ap ­
proach the curb at an angle.
~Have faulty tires or rims re­
placed immediately.
~Protect your tires from oil,
grease and fuel.
~Mark tires before removing
them so that the same running
direction can be maintained if
they are reinstalled.
~Lay tires flat when storing and
store them in a cool, dry location
with as little exposure to light as possible.
(D Note
-Please note that summer and winter tires are designed for
the conditions that are typical in those seasons. Audi recom­
mends using winter tires dur­
ing the winter months. Low
temperatures significantly de­
crease the elasticity of summ­
er tires, which affects traction
Wheels
and braking ability. If summer
tires are used in very cold
temperatures, cracks can form on the tread bars, resulting in
permanent tire damage that
can cause loud driving noise
and unbalanced tires.
-Burnished, polished or chromed rims must not be
used in winter driving condi­
tions. The surface of the rims does not have sufficient corro­
sion protection for this and
could be permanently dam­
aged by road salt or similar
substances.
Tire designations
Fig. 264 Tire specification codes on the
sidewall of a tire
.,.
283