2021 AUDI A8 brakes

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

Production options weight
means the combined weight of
those installed regular production
options weighing over 5 lbs.
(2.3 kg) in excess of those stand-
ard items which they replace, not
previously considered in curb
weight or accessory weight, in-
cluding heavy duty brakes, ride
levelers, roof rack, heavy duty
battery, and special trim.
Radial ply tire
means a pneumatic tire in which
the ply cords that extend to the
beads are laid at substantially
90 degrees to the centerline of
the tread.
Recommended inflation
pressure
see > page 292, Cold tire infla-
tion pressure.
Reinforced tire
means a tire designed to operate
at higher loads and at higher in-
flation pressures than the corre-
sponding standard tire. Rein-
forced tires may be identified as
“XL”, “xl”, “EXTRA LOAD”, or “RF”
on the sidewall.
294
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the tire beads are seated.
Rim diameter
means nominal diameter of the
bead seat. If you change your
wheel size, you will have to pur-
chase new tires to match the new
rim diameter.
Rim size designation
means rim diameter and width.
Rim width
means nominal distance between
rim flanges.
Sidewall
means that portion of a tire be-
tween the tread and bead.
Speed rating (letter code)
means the speed at which a tire is
designed to be driven for extend-
ed periods of time. The ratings
range from 93 mph (150 km/h)
to 186 mph (298 km/h) > table
on page 290. You may not find
this information on all tires be-
cause it is not required by law.
The speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates the >

4N0012721BF
Wheels

are listed on the safety compli-
ance sticker label located on the
driver’s side B-pillar.

A WARNING
Overloading a vehicle can cause
loss of vehicle control, a crash
or other accident, serious per-
sonal injury, and even death.
—Carrying more weight than
your vehicle was designed to
carry will prevent the vehicle
from handling properly and in-
crease the risk of the loss of
vehicle control.
—The brakes on a vehicle that
has been overloaded may not
be able to stop the vehicle
within a safe distance.
—Tires on a vehicle that has
been overloaded can fail sud-
denly, including a blowout and
sudden deflation, causing loss
of control and a crash.
—Always make sure that the to-
tal load being transported -
including the weight of a trail-
er hitch and the tongue
weight of a loaded trailer -
does not make the vehicle
heavier than the vehicle’s

Gross Vehicle Weight Rating.

Determining correct load
limit
Use the example below to calcu-
late the total weight of the pas-
sengers and luggage or other
things that you plan to transport
so that you can make sure that
your vehicle will not be overload-
ed.
Steps for Determining Correct
Load Limit
1. Locate the statement “THE
COMBINED WEIGHT OF OCCU-
PANTS AND CARGO SHOULD
NEVER EXCEED XXX KG OR XXX
LBS” on your vehicle’s placard
(tire inflation pressure label)
=> page 299, fig. 190.
2. Determine the combined
weight of the driver and pas-
sengers that will be riding in
your vehicle.
3. Subtract the combined weight
of the driver and passengers
from “XXX” kilograms or “XXX”
pounds shown on the sticker
=> page 299, fig. 190.
4. The resulting figure equals the
available amount of cargo and
luggage load capacity. For ex-
ample, if the “XXX” amount
equals 1400 lbs. and there will >
303

4N0012721BF
Care and cleaning


height and width of the inside of the car
wash.
ZA WARNING
—To reduce the risk of accidents, only wash
the vehicle when the ignition is off and fol-
low the instructions from the car wash oper-
ator.
—To reduce the risk of paint damage, do not
wash the vehicle in direct sunlight.
—To reduce the risk of damage, do not wash
decorative decals* with a pressure washer.
—To reduce the risk of damage to the surface,
do not use insect removing sponges, kitchen
sponges, or similar items.
— When washing matte finish painted vehicle
components:
—To reduce the risk of cuts, protect yourself
from sharp metal components when wash-
ing the underbody or the inside of the wheel
housings.
— After washing the vehicle, the braking effect
may be delayed due to moisture on the
brake rotors or ice in the winter. This in-
creases the risk of an accident. The brakes
must be dried with a few careful brake appli-
cations.
— To reduce the risk of damage to the sur-
face, do not use polishing agents or hard
wax.
— Never use protective wax. It can destroy
the matte finish effect.
@) Note — Do not place any stickers or magnetic
signs on vehicle components painted with
matte finish paint. The paint could be
damaged when the stickers or magnets
are removed.

— If you wash the vehicle in an automatic car
wash, you must fold the exterior mirrors in
to reduce the risk of damage to the mirrors.
Power folding exterior mirrors* must only
be folded in and out using the power folding (@) For the sake of the environment
function.
—To reduce the risk of damage to the rims
and tires, compare the width between the
wheels on your vehicle with the distance be-
tween the guide rails in the car wash.
—To reduce the risk of damage, compare the
height and width of your vehicle with the
Only wash the vehicle in facilities specially de-
signed for that purpose. This will reduce the
risk of dirty water contaminated with oil from
entering the sewer system.
Cleaning and care information
When cleaning and caring for individual vehicle are not listed, consult an authorized Audi dealer
components, refer to the following tables. The or authorized Audi Service Facility. Also follow
information contained there is simply recommen- __ the information found in > A.
dations. For questions or for components that
Exterior cleaning




Component Situation Solution
Windshield wiper | Deposits Soft cloth with glass cleaner, > page 67
blades
Headlights/ Deposits Soft sponge with a mild soap solution®
tail lights
Sensors/ Deposits Sensors: soft cloth with a solvent-free cleaning product
camera lenses Camera lenses: soft cloth with an alcohol-free cleaning sol-
ution
Snow/ice Hand brush/solvent-free de-icing spray >

311

Index

Battery
Charge levelindicator...............00. 12
Charging (12 Volt vehicle battery)....... 286
High-voltage battery.................. 131
Vehicle battery (12 Volt)............... 284
Winter operation (12 Volt vehicle battery) . 285
Battery (vehicle)
refer to High-voltage battery........... 131
Blinds
refer to Panoramic glass roof............ 53
BlOGk rote circus so ieee 2 ase 29 mem > wom 236
BlOWED's + sews x x wees & 2 maw x 2 se ge ewe F 101
Bluetooth
Audio player « scenes: 6s scenix <5 wens ¥ 0 eee © 2 251
Connecting adevice...............000- 265
Connecting a mobile phone............ 209
Deleting adevice vss si esas es eae ee ewe 266
Device overvieW.... 0.62... ee eee eee eee 265
Disconnecting adevice................ 265
Displaying profiles..................0. 266
Selecting adevice...............-.00. 265
Specifying a favorite...............00. 266
Boost... 2... eee eee eee 16
Boost function.................0 eee ee 112
Boost pressure indicator................. 16
Brake fluid
Checking the brake fluid level........... 283
Brakes... 2... cee eee 119
Brakeifllids: « + sawex x = yew 2 2 eee 2 2 cee 283
Emergency braking function............ 121
Hot... eee eee 122
New brake pads.........-. 00 eee eee ee 119
Brands..............00000 0 cece eee eee 268
Break-in security feature................. 44
Breaking in
New brake pads............0.--000 eee 119
New tires. 5s sccm so moa vo meen yo so oe 296
Browser
refer to Mediacenter.................. 254
Bulb replacement.............-.020-00. 332
Business. addresses. < win. < aan oa same oo 236
Cc
California Proposition 65 Warning........ 275
Battery specific...............0.-.00. 285
CaLLLISE,. ssccane x avons w os awawees vw aoe octave 215
346
CaMONAS csciaics i o cairns o & cnwcuns vo somes x a seco 151
Locations..... 6... eee eee eee 152
Capacities
FUGUTANKS ¢ i wasn 2b imaae o anon Gs RoE GE a 344
Washer fluid reservoir................. 344
GCarGO Nets s = weg s were ss were © = Heme & x Be 98
Gariwashi« « « wey: «2 ewes = 2 wats bo ee oe oe 310
Catalytic converter........... 0. eee eee 273
Cell phone
refer to Telephone..............--.05- 209
Cell phone compartment
refer to Audi phone box.............4. 211
Central lOckinG'es « a saves x ame a e cows 2 e pow Al
FNUEOMLOGRE. « scvswen x exectzeim x serene a x iceman oa eet 41
Convenience key....... 0... cece eee e eee 46
Convenience opening and closing......... 53
Luggage compartment lid............... 49
Mechanically unlocking and locking....... 44
M@SSAG6S « see = « mews ¢ x eee so eee § Re 43
Remote control: keys. so cies es eee ae eee 46
Setting. ........ 0.0.02 eee eee eee eee 42
Vehicle-Kéy sce < » seu so sews + ¢ ees + vee 46
Central locking switch...............0005 43
Ceramic brakes....................00005 119
Certification... .....................00. 341
Changing light bulbs................... 332
Charging
refer to Power sourceS.........--0e ee eee 94
Charging clip
refer to Wall mount clip............... 145
Charging display................--0000- 135
Charging the battery
Mobilevdevices:: « « sissy 2 x xewe 2 2 eee 2 oo 252
SBia s+ sestos x comsene © x umsens & cuseane 1 w oeeosts a 212
Wireless ............ 0.0000 c cece eee 213
Charging time.......... 0... cee eee eee ee 132
Child safety lock
Climate control system controls inthe rear. 51
PoWer WING OWS cuse x 2 gece a 2 awe 4 & gaan as SL
Rear doorsten «ose <0 wane < oamstee « citenest = Si
Child-safety seats’... cscs v5 cme ve eco se one 88
Securing to the top tether anchor........ 92
Securing with a safety belt.............. 91
Securingiwith LATCH: « 2 ssse © « ccoswes v x nose 91
GIGANIING « crv: vo same ao arms « eee oo BA 310
Cleaning Alcantara.............-.00000. 313
Cleaning artificial leather............... 313