2014 AUDI A8 brakes

254 Tire s and wheel s
vehicle with diffe rent rims/ti res or you bought
the vehicle as a previously owned vehicle.
Remembe r, your safety and that of your pas­
sengers also depends on mak ing sure that
l oad limits are not exceeded . Vehicle load in­
cludes everybody and everything in and on the
ve hicle . These load limits are technically refer­
red to as the vehicle's Gross Vehicle We ight
Rating ("GVWR"). The Gross Axle Weight Rat­
ing ("GAWR") is the maximum load that can
be applied at each of the veh icle 's two axles.
The Gross Vehicle Weight Rating and the
Gross Axle Weight Rat ing a re listed on the
safety compliance st ic k er labe l located on the
d river's side B-p illar. T he tire pressure label on
your Audi lists the maximum combined
weight of a ll of the occupants and luggage or
othe r cargo that the vehicle can carry. For the
locat ion of the tire pressure label¢
fig. 208.
A WARNING
Overloading a vehicle can cause loss of ve­
hicle control, a cras h or other acc ident, se­
r ious personal in ju ry, and even death.
- Carry ing more weight than your vehicle
was designed to carry will prevent the
vehicle from handling p roperly and in­
cr ease the risk of a loss of veh icle con­
tro l.
- T he brakes on a veh icle that has been
overloaded may not be ab le to stop the
vehicle within a sa fe distance.
- Ti res on a vehicle that has been ove rload­
ed can fail suddenly causing loss of con­
tro l and a crash .
- Always make su re that the tota l load be­
ing t ransported -including the we igh t of
a tra ile r hi tc h and the tongue weight of a
loaded t ra iler -does not make the veh i­
cle heavier than the ve hicle's Gross Vehi­
cle Weight Rating.
A WARNING
- Incorrect tire pressures and/or underin­
flation can lead to a serious or fatal acci­dent .
-
'
-Incorrect tire pressures and/or underin­
f lation ca use increased tire wear and can
affect the handling of the vehicle .
- Incorrect tire pressures and/or underin­
flation can a lso lead to sudden t ire fail­
ure, including a blowout and sudden de­
flation, caus ing loss of veh icle control.
Checking tire pressure
The correct tire pressure for the tires original­
ly ins talled on your vehicle is lis ted on the tire
pressure label located on driver's side 8-pil­
lar .
The recommended tire pressures are on the
tire pressure label and in the table
¢
page 252, Cold tire inflation pressure. This
means that the pressure m ust be checked and
adjusted when the t ire has not been dr iven fo r
more than a couple of miles (kilomete rs) a t
low speeds d uring the prev ious t hree ho urs.
Air in the tires expands when the tire heats up
as a result of interna l friction as it flexes in
u se . T he tire pressure is higher when the tire
has warmed up than when it is "cold."
It is the inflation pressure in a "co ld" t ire that
counts . Therefore, you should never let air out
of a warm tire to match "Cold tire inflation
pressure" recommendat ions ¢
page 252 . The
t ires wou ld then be underinflated and could
fail suddenly .
The tire pressure label on your Audi lists the recommended co ld tire inflation pressures at
maximum capacity for the new, orig inal
equipment tires that were on your vehicle at
the time it was ma nufactu red . Fo r the loca ­
t ion of the label¢
page 252, fig . 208 .
Most tires lose air naturally over t ime . They
can a lso lose some air if you drive over a pot­
hole or hit a curb while park ing . It is usually
not possible to see whether the rad ial tires
u sed today are unde rinflated just by loo kin g
at them.
T herefo re, be sure to check t ire p ressures at
least once a month and always befo re going
o n a long trip. Ma ke su re to ta ke the numbe r
II>-

A WARNING ,~
Overloading a vehicle can cause loss of ve­
hicle control, a crash or other accident, se ­
rious persona l 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 con­
trol.
- 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 overload­
ed can fail suddenly, including a blowout
and sudden deflation, causing loss of
control and a crash.
- Always make sure that the total load be­
ing transported -including the weight of
a trailer hitch and the tongue weight of a
loaded trailer -does not make the vehi­
cle heavier than the vehicle's Gross Vehi­
cle Weight Rating.
Determining correct load limit
Use the example below to cal­
culate the total weight of the
passengers and luggage or oth­
er things that you plan to trans­
port so that you can make sure
that your vehicle will not be
overloaded.
Steps for Determining Correct Load Limit
1. Locate the statement "THE
COMBINED WEIGHT OF OC­
CUPANTS AND CARGO
SHOULD NEVER EXCEED XXX
KG OR XXX LBS" on your ve­
hicle's placard (tire inflation
Tires and wheels 257
pressure label) ¢ page 252,
fig. 208.
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 pas­
sengers from
"XXX" kilo­
grams or
"XXX" pounds
shown on the sticker
¢ page 252, fig. 208.
4. The resulting figure equals
the available amount of car­
go and luggage load capaci­
ty. For example, if the
"XXX"
amount equals 1400 lbs.
and there will be five 150
lbs. passengers in your vehi­
cle, the amount of available
cargo and luggage load ca­
pacity is 650 lbs. (1400-7 50
(5
X 150) = 650 lbs.)
5. Determine the combined weight of luggage and cargo
being loaded on the vehicle.
That weight may not safely
exceed the available cargo
and luggage load capacity
calculated in Step 4.
6. If your vehicle will be towing
a trailer, load from your trail­
er will be transferred to your
i,,,.
•
•

26 2 T ire s and wheel s
Driving with different tires reduces vehi­
cle handling and can lead to a loss of
co ntrol.
- I f the spare tire is not the same as the
t ires that are mounted on the veh icle -
for example with winter tires - only use
the spare tire for a short period of time
and dr ive with extra care . Refit the nor­
ma l road wheel as soon as safely possi­
ble.
- Never drive faste r than the maximum
speed for which the tires on your veh icle
are rated because ti res that a re driven
faster than their rated speed can fail
sudden ly .
- Overloading t ires cause heat build- up,
sudden tire failure, including a blowout
and sudden deflation and loss of control.
- T emperature grades app ly to tires that
are properly inflated and not over o r un­
derinflated .
- For technical reasons it is not a lways
possible to use wheels from other
vehicles -in some cases not even wheels
from the same vehicle model.
- If you insta ll wheel trim discs on the ve­
hicle whee ls, make sure that the air f low
to the brakes is not blocked. Reduced air­
flow to the brakes can them to overheat, increasing stopping distances and caus­
ing a collision .
- Run flat t ires may on ly be used on
vehicles that were equ ipped w ith them
at the facto ry . The vehicle must have a
chassis des igned for run f lat t ires . Incor­
rect use of run flat tires can lead to vehi­
cle damage or acc idents. Check with an
au thorized Aud i dealer or ti re specia list
to see if your vehicle can be equipped
with run f lat tires. If run flat tires are
used, they must be installed on all four
wheels . Mix ing tire types is not permit­
ted .
(D Note
-For technica l reasons, it is not generally
possib le to use the whee l rims from oth- er veh
icles. This can hold true for wheels
of the same vehicle type.
- If the spare tire is d iffe rent from the
tires that yo u have mounted on your ve­
hicle (for example winter tires o r wide
profi le tires), then use the spare tire for a
short period of time only and drive w ith
extra care. Replace the flat tire w ith the
tire matching the others on your vehicle as soon as possible .
- Never drive without the valve stem cap .
T he valves could get damaged .
® For the sake of the environment
Dispose of o ld tires in accordance with the
l ocal requirements.
Uniform tire quality grading
- Tread wear
- Traction AA A B C
- Temperature ABC
Quality grades can be found where applicab le
on the t ire s ide wall between tread shou lder
and maximum section width
c> page 259,
fig. 212 .
For example : Tread wear 200, Traction AA,
Temperature A.
All passenger ca r tires must conform to Feder­
al Safety Requirements in addition to these
grades.
Tread wear
T he tread wear grade is a comparative rating
based on the wear rate of the t ire when tested
u nder contro lled conditions o n a specified
government test course .
For example, a tire graded 1S0 would wear
one and o ne ha lf ( 11/2) times as well on the
gover nment course as a t ire g raded 100 .
The relative performance of tires depends upon the actual conditions of their use, how­
ever, and may depa rt s ignificantly from the
norm due to va ria tions in d riving hab its, se rv­
ice practices and differences in road character-
istics and climate.
ll-

298 Index
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 80
Setup ..... ................ ..... .. 82
Automatic climate control system
synchron izing .......... .. .. .. .. .. .. 81
Automatic transmission . .. .. .. .. .. .. . 116
Automatic transmission (tiptronic) Emergency mode . . . . . . . . . . . . . . . . . . 120
Kick -down . . . . . . . . . . . . . . . . . . . . . . . . 119
Manual shifting .......... .. .. .. .. . 119
Parking lock emergency release . .. .. . 121
Selector lever positions . . . . . . . . . . . . . 116
Automatic wipers .................. .. S3
Auto Safety Hotline . . . . . . . . . . . . . . . . . 143
Average consumption ........... .. .. .. 25
Average speed . . . . . . . . . . . . . . . . . . . . . . . 25
Avoid damaging the vehicle ...... .. .. . 209
B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Charging . .. ................ ... .. . 245
I mportant warnings .......... .. .. . 243
L ocat ion . . . . . . . . . . . . . . . . . . . . . . . . . 243
low ... .. .. .. . .......... .. .. .. .. . 204
Replacing the battery . . . . . . . . . . . . . . 246
State of charge ............ ... .... . 204
Winter operation .......... ... .... . 243
Working on the battery .... .. .. .. .. . 243
Before driving ........... .. .. .. .. .. . 135
Blended gasoline . ...... ... .... .. .. . 222
Blower (automatic climate control) . ... .. 81
Booster seats .............. ... .. ... 185
Brake fluid Changing the brake fluid ... .. .. .. .. . 242
Check ing the brake fluid level ... .. .. . 242
What is the correct brake fluid level? .. 242
What should I do if the brake fluid warn-
ing light comes on? ..... .. .. .. .. .. . 242
Brake system Anti-lock braking system ... .. .. .. .. . . 19
Brake assist system ......... .. .. ... 199
Brake booster . .. ...... .... ... .. .. . 203
Brake fluid .............. .... ..... 242
Brake fluid spec ificat ions for refill and re­
p la cement . . . . . . . . . . . . . . . . . . . . . . . 242
Brake light defective ....... ... .... . . 22
Brake pads ............... ... .... . 207
Electromechanica l parking brake .. .. . . 86 Fluid
reservoir ... ................ . 242
How does moisture or road salt affect the
brakes? .......................... 201
Warning/indicator lights ........ .... . 14
Worn brake pads symbol . . . . . . . . . . . . . 20
braking guard Messages ..... .. ............. .... 101
Braking guard . .. .. ... .......... .. .. . 94
Settings .. .... ............... .... 101
Break-in period .. .. ... .......... .. .. 207
Brake pads .. .. .. .......... ... .. .. 207
Tires ...... ... .. .. ........ ... .. .. 207
Bul bs .. .... .... ................... 282
C
California Proposition 65 Warning ..... 232
Battery specific . . . . . . . . . . . . . . . . . . . 24S
Capacities .. .. .. . .............. .. .. 290
Engine oil ..... .. ... .......... .. .. 234
Carbon parts Cleaning . . . . . . . . . . . . . . . . . . . . 218,219
Car carrier Transporting your vehicle ....... .... 287
Care ... .... .... ............... .... 216
Cargo area
refer to Luggage compartment . .. .. .. 141
Catalytic converter . ................. 208
Center armrest
Cockpit ........................... 61
Rear ............................. 68
Central locking .. .. ... ........... ... . 33
Emergency locking .. ........... .... . 37
Certification .. .. .. ............. .. .. 29S
Changing a wheel .. ............. .... 272
Chang ing engine oil ....... ...... .. .. 238
Checking Engine coolant level . ........... .. .. 240
Tire pressure .................... .. 254
Child restraints Danger of using child restraints in the
front seat . ................... .... 15S
Where can I get additional information
about child restraints and their use? .. 196
Child restraint system anchors ..... ... 190