fuel AUDI A8 2021 Owner's Manual

Wheels

Glossary of tire and loading
terminology
Accessory weight
means the combined weight (in
excess of those standard items
which may be replaced) of auto-
matic transmission, power steer-
ing, power brakes, power win-
dows, power seats, radio, and
heater, to the extent that these
items are available as factory-in-
stalled equipment (whether in-
stalled or not).
Aspect ratio
means the ratio of the height to
the width of the tire in percent.
Numbers of 55 or lower indicate a
low sidewall for improved steer-
ing response and better overall
handling on dry pavement.
Bead
means the part of the tire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim.
Bead separation
means a breakdown of the bond
between components in the bead.
292
Cord
means the strands forming the
plies in the tire.
Cold tire inflation pressure
means the tire pressure recom-
mended by the vehicle manufac-
turer for a tire of a designated
size that has not been driven for
more than a couple of miles (kilo-
meters) at low speeds in the three
hour period before the tire pres-
sure is measured or adjusted.
Curb weight
means the weight of a motor ve-
hicle with standard equipment in-
cluding the maximum capacity of
fuel, oil, and coolant, air condi-
tioning and additional weight of
optional equipment.
Extra load tire
means a tire designed to operate
at higher loads and at higher in-
flation pressures than the corre-
sponding standard tire. Extra load
tires may be identified as “XL”,
“xl”, “EXTRA LOAD”, or “RF” on
the sidewall.

Wheels

Checking and correcting tire
pressure
> Check the tire pressure at least
once per month and also check it
before every long drive.
> Always check the tire pressure
when the tires are cold. Do not
reduce the pressure if it increas-
es when the tires are warm.
>Refer to the sticker > fig. 190
for the correct tire pressure.
>Correct the tire pressure if nec-
essary.
> Store the new tire pressure in
the MMI & page 308.
> Check the pressure in the spare
tire*. Always maintain the maxi-
mum temperature that is speci-
fied for the tire.


and follow the important safe-
ty precautions in > page 302.
—The tire must flex more if the
tire pressure is too low or if
the vehicle speed or load are
too high. This heats the tire up
too much. This increases the
risk of an accident because it
can cause the tire to burst and
result in loss of vehicle con-
trol.
—Incorrect tire pressure increas-
es tire wear and has a negative
effect on driving and braking
behavior, which increases the
risk of an accident.


Z\ WARNING
Always adapt the tire pressure
to your driving style and the ve-
hicle load.
—Overloading can lead to loss of
vehicle control and increase
the risk of an accident. Read

() Note
Replace lost valve caps to re-
duce the risk of damage to the
tire valves.
©) For the sake of the envi-
ronment
Tire pressure that is too low in-
creases fuel consumption.
Uc ecm] )
Please note that the information
contained in the following table
was correct at the time of print-
ing, and the information is sub-
300
ject to change. If there are any
differences, you should always
follow the tire pressure sticker
> page 299, fig. 189.

Wheels


Z\ WARNING
Please note the important safe-
ty precautions regarding tire
pressure > page 299 and load
limits > page 302.
Tires and vehicle load limits
There are limits to the amount of
load or weight that any vehicle
and any tire can carry. A vehicle
that is overloaded will not handle
well and is more difficult to stop.
Overloading can not only lead to
loss of vehicle control, but can al-
so damage important parts of the
vehicle and can lead to sudden
tire failure, including a blowout
and sudden deflation that can
cause the vehicle to crash.

Your safety and that of your pas-
sengers also depends on making
sure that load limits are not ex-
ceeded. Vehicle load includes ev-
erybody and everything in and on
the vehicle. These load limits are
technically referred to as the vehi-
cle’s Gross Vehicle Weight Rating
(“GVWR”).
The “GVWR” includes the weight
of the basic vehicle, all factory in-
stalled accessories, a full tank of
fuel, oil, coolant and other fluids
302
plus maximum load. The maxi-
mum load includes the number of
passengers that the vehicle is in-
tended to carry (“seating capaci-
ty”) with an assumed weight of
150 lbs. (68 kg) for each passen-
ger at a designated seating posi-
tion and the total weight of any
uggage in the vehicle. If you tow
a trailer, the weight of the trailer
hitch and the tongue weight of
the loaded trailer must be includ-
ed as part of the vehicle load.
The Gross Axle Weight Rating
(“GAWR’”) is the maximum load
that can be applied at each of the
vehicle’s two axles.

The fact that there is an upper
limit to your vehicle’s Gross Vehi-
cle Weight Rating means that the
total weight of whatever is being
carried in the vehicle (including
the weight of a trailer hitch and
the tongue weight of the loaded
trailer) is limited. The more pas-
sengers in the vehicle or passen-
gers who are heavier than the
standard weights assumed mean
that less weight can be carried as
luggage.
The Gross Vehicle Weight Rating
and the Gross Axle Weight Rating >

4N0012721BF
Wheels

& Loose wheel warning: malfunction! See
owner's manual
There is a system malfunction. Drive immediately
to an authorized Audi dealer or authorized Audi
Service Facility to have the malfunction repaired.

ZA\ WARNING
Wheel bolts that are tightened incorrectly can
become loose and result in loss of vehicle con-
trol, which increases the risk of an accident.
— If a message appears, reduce your speed im-
mediately and avoid any hard steering or
braking maneuvers. Stop as soon as possible
and check the wheel bolts.
— Check your wheels for damage. Have the
damaged wheels checked and/or replaced
immediately by an authorized Audi dealer or
authorized Audi Service Facility.
— Under certain conditions (such as a sporty
driving style, winter conditions, or unpaved
roads), the message may be delayed.
— The driver is responsible for ensuring that

the wheels are attached correctly.
@) Tips
— The loose wheel warning system can also
stop working when there is an ESC malfunc-
tion.
— Using snow chains may result in a system
malfunction.
Winter tires significantly improve the vehicle's
handling when driving in winter conditions. Be-
cause of their construction (width, compound,
tread pattern), summer tires provide less traction
on ice and snow.

> Use winter tires on all four wheels.
> Only use winter tires that are approved for your
vehicle.
> Please note that the maximum permitted
speed may be lower with winter tires > A\ in
General information on page 289. An author-
ized Audi dealer or authorized Audi Service Fa-
cility can inform you about the maximum per-
mitted speed for your tires.
> Check the tire pressure after installing wheels
=> page 299.
The effectiveness of winter tires is reduced great-
ly when the tread is worn down to a depth of
0.16 in (4 mm). The characteristics of winter tires
also decrease greatly as the tire ages, regardless
of the remaining tread.
@) For the sake of the environment
Reinstall summer tires at the appropriate
time, because they provide better handling
when roads are free of snow and ice. Summer
tires cause less road noise, tire wear, and fuel
consumption.
(i) Tips
You can also use all season tires instead of
winter tires. Please note that in some coun-
tries where winter tires are required, only win-
ter tires with the 4 symbol may be permit-
ted.
Snow chains improve both driving and braking in
winter road conditions.
> Only install snow chains on the front wheels.
> Check and correct the seating of the snow
chains after driving a few feet, if necessary. Fol-
low the instructions from the manufacturer.
> Note the maximum speed of 30 mph
(50 km/h). Observe the local regulations.
Use of snow chains is only permitted with certain
rim/tire combinations due to technical reasons.
Check with an authorized Audi dealer or author-
ized Audi Service Facility to see if you may use
snow chains.
Use fine-mesh snow chains. They must not add
more than 0.40 inch (10.5 mm) in height, includ-
ing the chain lock.
You must remove the snow chains on roads with-
out snow. Otherwise, you could impair driving
ability and damage the tires.
305

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Wheels

heat when tested under controlled conditions on
a specified indoor laboratory test wheel.
Sustained high temperature can cause the mate-
rial of the tire to degenerate and reduce tire life,
and excessive temperature can lead to sudden
tire failure > A\.
The grade C corresponds to a level of perform-
ance which all passenger car tires must meet un-
der the Federal Motor Vehicle Safety Standard
No. 109. Grades B and A represent higher Levels
of performance on the laboratory test wheel than
the minimum required by law.

ZA\ WARNING
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor-
nering, hydroplaning or peak traction charac-
teristics.

ZA WARNING
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla-
tion, or excessive loading, either separately or
in combination, can cause heat buildup and
possible tire failure.

ZA WARNING
Temperature grades apply to tires that are
properly inflated and not over or underinflat-
ed.


Tire pressure monitoring
system
(1) General notes
Each tire, including the spare (if provided),
should be checked monthly when cold and inflat-
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tire inflation pressure la-
bel, you should determine the proper tire infla-
tion pressure for those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system
(TPMS) that illuminates a low tire pressure tell-
tale when one or more of your tires is significant-
ly under-inflated. Accordingly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure. Driving ona signifi-
cantly under-inflated tire causes the tire to over-
heat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life,
and may affect the vehicle's handling and stop-
ping ability.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver's re-
sponsibility to maintain correct tire pressure,
even if under-inflation has not reached the level
to trigger illumination of the TPMS low tire pres-
sure telltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the sys-
tem is not operating properly. The TPMS mal-
function indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi-
mately one minute and then remain continuously
illuminated. This sequence will continue upon
subsequent vehicle start-ups as long as the mal-
function exists.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS malfunctions
may occur for a variety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
307

Care and cleaning




Component Situation Solution
Laser scanner Deposits Soft sponge with a mild soap solution®
Wheels Road salt Water
Brake dust Acid-free special cleaning solution
Exhaust tail Road salt Water, cleaning solution suitable for stainless steel, if nec-
pipes essary
Decorative parts | Deposits Mild soap solution ®, a cleaning solution suitable for stain-
and
trim
less steel, if necessary

Paint Paint damage Repair with touch-up paint

Spilled fuel Rinse with water immediately

Surface rust Rust remover, then treat with hard wax; for questions, con-
sult an authorized Audi dealer or authorized Audi Service
Facility.

Corrosion Have it removed by an authorized Audi dealer or authorized
Audi Service Facility.

Water no longer
beads on the surface
of clean paint
Treat with hard wax (at least twice per year)

No shine even though
paint has been pro-
tected/paint looks
poor
Treat with suitable polish; then apply paint protectant if
the polish that was used does not contain any protectant

Deposits such as in-
sects, bird droppings,
tree sap, and road
salt
Dampen with water immediately and remove with a micro-
fiber cloth

Grease-based con-
taminants such as
cosmetics or sunblock
Remove immediately with a mild soap solution ® and a soft
cloth

Carbon compo-__| Deposits clean the same way as painted parts > page 310
nents
Decorative decals | Deposits Soft sponge with a mild soap solution®
Audi e-tron Deposits Soft, dry towel
charging system
Wall mount clip | Deposits Soft towel with alcohol-free cleaning solution

a) Mild soap solution: maximum two tablespoons of
Interior cleaning
neutral soap in 1 quart (1 liter) of water


Component Situation Solution
Window glass Deposits Glass cleaner, then wipe dry
Decorative parts {Deposits Mild soap solution®
and
trim

312

Fuses and bulbs








Fuse assignment - left side of cockpit
RAZ-0202

Fig. 210 Left side of the cockpit: fuse panel with plastic
clip






Fig. 211 Left side of the luggage compartment: fuse panel
with plastic clip
2 | Engine components 10 | Volume control
3 | Engine components 11 | Light switch, switch panels
4 |Engine components 12 | Steering column electronics
5 | Brake light sensor 14 | MMI Infotainment system control module
6 | Engine components 15 |Steering column adjustment
7 |Engine components 16 | Steering wheel heating
8 | Engine components
9 | Engine components ae ft side of the luggage
10 | Oil pressure sensor, oil temperature sensor (eelar|PEINE Ee
11 | Engine components g
12 | Engine components
13 | Engine cooling
14 | Engine control module, fuel injectors
15 | Engine sensors
16 | Fuel pump









330
No. Equipment No. | Equipment
Climate control system, interior air sensor 1_| Thermal management
2 | Audi phone box 5 |Air suspension/suspension control
Climate control system, fragrance system, 6 |Automatic transmission control module
3 particulate matter sensor 7 |Right rear seat adjustment
4 |Head-up display 8 | Rear seat heating
S_ |Audi music interface, USB input 9 |
Left tail light
6 |Instrument panel 10 | Front belt tensioner on driver's side
7 | Steering column lock
8 |Upper/lower display
9 |Instrument cluster

4N0012721BF
Fuses and bulbs





















































Fuse panel () (black) Fuse panel @) (brown)
Luggage compartment lid central locking, 15 |Left rear seat adjustment
11 | fuel filler door, sunshade, luggage com- Front belt tensioner on front passenger's
partment cover 16 side
12 | Luggage compartment lid control module
— Fuse panel (4) (black)
Fuse panel (2) (red) No. | Equipment
No. | Equipment Seat ventilation, rear seat heating, rear-
1 | Rear climate control system blower 1 |view mirror, refrigerator, diagnostic con-
2 | Exterior antenna nection
3 | Exhaust treatment, sound actuator 2 | Gateway control module (communication)
4 |Rear climate control system control panel 3 [Sound actuator
5 | Right trailer hitch light 4 |Transmission heating valve
6 |Trailer hitch positioning motor 5 |Engine start, electric drive
7 |Trailer hitch release 7 |Active accelerator pedal
8 | Left trailer hitch light 8 | Night vision assist, active suspension
9 |Trailer hitch socket 9 _|Adaptive cruise assist
10 |Allroad sport differential 1 Intersection assistant, driver assist sys-
11 | Exhaust treatment tems, radar systems, camera systems
12 |48 V drivetrain generator 2 || Exteriorsoundigenerator
13 | USB input
Fuse panel (3) (brown) 14 [Right headlight
No. | Equipment 15 |Left headlight
1 |Driver assistance systems control module :
2 |Rear Audi phone box Fuse panel () (red)
3 | Rear seat adjustment No:.| Equipment
4 |Side assist 1 | Active suspension
5 |Sereensinthe rear 2 |Service disconnect switch
6 |Tire pressure monitoring system 3_|Refrigerator
7 [Emergency call system 4 | Electric drive system
Auxiliary heating radio receiver, tank mod- 5 |/Brake-system
8 ule 6 | High-voltage battery water pump
9 | Automatic transmission selector lever 7 |Auxiliary climate control
0 TV tuner, data exchange and telematics 8 |Climate control system compressor
control module 9 |Auxiliary battery control module
rT Convenience access and start authoriza- 10 | High-voltage battery
tion control module 11 | High-voltage charger
12 | Garage door opener 14 | Thermal management
13 | Rearview camera, peripheral cameras 15 | Thermomanagement control module
Convenience system control module, right -
14 | Vil light Fuse panel 6) (white)
No. | Equipment
1 |Rear center armrest heating

331

Accessories and technical changes

Accessories and
technical changes
Warranty
Your vehicle is covered by various warranties:
— New Vehicle Limited Warranty
— Limited Warranty Against Corrosion Perforation
— Emissions Control System Warranties: Federal
Emissions Control System Defect Warranty,
Federal Emissions Performance Warranty
— Applies to: USA models: Kansas Safety Belt
Limited Warranty
— Applies to: USA models: California Emissions
Control Warranties: Short-term Emissions De-
fects Warranty, Long-term Emissions Defects
Warranty, TZEV models Emissions Defects
Warranty, California Emissions Performance
Warranty
You can find detailed information in your Warran-
ty & Maintenance Booklet and in the California
Emissions Booklet*.
Audi Literature Shop
Service information is made available as soon as
possible after a model is introduced and can be
ordered in the Audi Literature Shop: http://
literature.audiusa.com
Driving in other
countries
Government regulations in the United States and
Canada require motor vehicles to comply with
emissions regulations and safety standards.
Therefore, vehicles that were produced for the
U.S. and Canadian markets are different from
vehicles produced for other countries.
If you plan to use your vehicle outside of the
United States or Canada, it is possible that:
— Fuel may have a significantly lower octane rat-
ing. Unsuitable fuels can cause engine damage.
— Proper maintenance and repair work may not
be possible because special service equipment,
tools, or measuring devices needed for your ve-
hicle may not be available.
338
— Replacement parts may not always be availa-
ble.
— Navigation systems for vehicles built for the
U.S.A. and Canada will not necessarily work in
Europe, and may not work in other countries.
(1) Note
Audi is not liable for damage to the vehicle re-
sulting from these country-specific differen-
ces.
Maintenance, repairs,
and technical modifi-
cations
Observe the safety precautions > page 274, Gen-
eral information and > page 321, Raising the ve-
hicle.
General information
Due to the increasing complexity of technology in
these vehicles, as well as the safety and environ-
mental standards that apply, you can only per-
form a very limited amount of repairs and modifi-
cations to the vehicle yourself.
Proof of maintenance work may be required to
submit a claim within the warranty period.
We recommend that you have your vehicle serv-
iced by an authorized Audi dealer or authorized
Audi Service Facility and that Audi Genuine Parts
and Audi Genuine Accessories are used. This
helps to ensure that your vehicle's functionality,
performance, and safety are not impaired.
Maintenance and repairs
Your vehicle was designed to help keep mainte-
nance requirements to a minimum. Some regular
maintenance is required to help ensure that your
vehicle runs in a safe, economical, and reliable
manner. Please refer to your Warranty & Mainte-
nance Booklet for more detailed information
about vehicle maintenance.
When operating the vehicle under more extreme
operating conditions, for example when outside
temperatures are very low or in very dusty envi-
ronments, certain maintenance should be per-
formed between the specified intervals.

4N0012721BF
Accessories and technical changes

Usually maintenance and repair work requires
special tools, measuring devices, and other
equipment that is available to trained vehicle
technicians in order to help ensure that your vehi-
cle and all of its systems operate correctly, relia-
bly, and safely. Performing work on the vehicle
incorrectly can impair the operation and reliabili-
ty of your vehicle and may void one or more of
your vehicle's warranties.
Technical Modifications
Interference with electronic components, their
software, the wiring, and data transfer may cause
malfunctions. Because of the way electronic com-
ponents are interconnected, such malfunctions
can also impair systems that are not directly in-
volved. This means that you risk both a substan-
tial reduction in the operational safety of your ve-
hicle and increased wear of vehicle components.
Some convenience functions, such as the conven-
ience turn signal function, individual door open-
ing function, and displays, can be reprogrammed
using special workshop equipment. If functions
are reprogrammed, the information and descrip-
tions about these functions in this Owner's Man-
ual may no longer apply to the changed func-
tions. Audi recommends that an authorized Audi
dealer or authorized Audi Service Facility perform
and verify any reprogramming procedures.


— Never perform any work in the engine com-
partment unless you know exactly how to
carry out the job and have the correct tech-
nical information and the correct tools.
— If you are uncertain about what to do, have
the work performed by an authorized Audi
dealer, an authorized Audi Service Facility,
or another qualified workshop. Serious per-
sonal injury may result from improperly per-
formed work.


ZA WARNING
Maintenance work, repairs, or technical modi-
fications to the vehicle (such as installing ad-
ditional equipment) that is not performed
correctly can cause serious injuries and in-
crease the risk of an accident.


Z\ WARNING
The engine compartment in any motor vehicle
is a potentially dangerous area and can cause
serious personal injury.
— Always use extreme caution when doing any
work in the engine compartment. Always
follow commonly accepted safety practices
and use common sense. Never risk personal
injury.

@) Note
— Maintenance work, repairs, or technical
modifications to the vehicle (such as instal-
ling additional equipment) that is not per-
formed correctly can cause vehicle damage.
— If emergency repairs must be performed,
take your vehicle to an authorized Audi deal-
er or authorized Audi Service Facility as soon
as possible.
— Audi is not liable for damage to the vehicle
resulting from failure to comply with these
guidelines.
@) For the sake of the environment
— Regular maintenance can help protect the
environment.
— Technical modifications to the vehicle can
have a negative impact on fuel consumption
and vehicle emissions.
@) For the sake of the environment
Certain components in your vehicle such as
undeployed airbag modules, pretensioners
and remote control batteries may contain Per-
chlorate Material - special handling may ap-
ply, See www.dtsc.ca.gov/hazardouswaste/
perchlorate. When the vehicle or parts of the
restraint system including airbag modules
and safety belts with pretensioners are scrap-
ped, all applicable laws and regulations must
be observed. Your authorized Audi dealer is
familiar with these requirements and we rec-
ommend that you have your dealer perform
this service for you.
339