Tires and wheels 245
Tire pressure generally refers to tant things you can do to help •
the amount of air in a tire that avoid sudden tire failure. Un-• '
it needs it to do its job and derinflated tires are a major
safely carry the combined load cause of sudden tire failure. of the entire vehicle and its con- Keeping tires at the right pres-
tents. Tire pressure is measured sure is also important for safe
in kilopascals (kPa), the inter- and responsive vehicle han-
national measuring unit and in dling, traction, braking and
pounds per square inch (PSI) . load carrying.
Tire pressures
Tire pressure is based in part on are particularly important
the vehicle's design and load when the vehicle is being driv-
limit - the greatest amount of en at higher speeds, and then
weight that the vehicle can car -especially when heavily loaded
ry safely and the tire size. The even within the permissible
proper tire pressure is frequent-load-carrying capacities ap-
ly referred to as the "recom-proved for your vehicle.
mended cold tire inflation pres-The recommended tire pres-
sure ." Air in the tires expands
sures for your Audi depend on
when the tire heats up because the kind of tires on your vehicle
of internal friction when it flex- and the number of passengers
es in use. The tire pressure is and/or amount of luggage you
higher when the tire has will be transporting.
warmed up than when it is The tire pressure label is locat-
"cold. " It is the inflation pres-
ed on the driver's side B-pillar.
sure in a "cold" tire that counts.
Therefore, you should never let The tire pressure label lists the
recommended cold tire infla-
air out of a warm tire to match
"cold tire inflation pressure" tion pressures for the vehicle at
its maximum capacity weight
recommendations. The tires
would then be underinflated and tires that were on your ve
-
and could fail suddenly. hicle at the time it was manu-
M factured
. N
0
Maintaining proper tire pres-<.J 'SI: ,...., \!)
sure is one of the most impor-1.1'1 ,...., 1.1'1 ,....,
246 Tires and wheel s
If you wish to improve comfort See the illustration ¢ fig. 195
when operating the vehicle at for the locati on of the labe l on
normal load (up to 3 occu -driver's side B -pillar (color of
pants), you can adjust tire the actual label and exact loca-
pressures to those specified tion on the vehic le will vary
for normal vehicle load. Before slight ly) .
operat ing the vehicle at maxi -Note that the following table is
mum load , you must increase accurate at the time of going to
the ti re pressu res to those press and is subject to change .
specified for maximum vehicle In the event of discrepancies,
load¢&. the tire pressure labe l is locat-
Bear in mind that the tire pres- ed on the driver's side 8-pi llar
sure monitoring system can on -always takes precedence .
ly monitor the tire pressures The table below lists the rec-
you have stored . The system
ommended cold tire inflation
does not recogn ize the load
pressures for the Audi model
condition of your vehic le.
covered by your Owner's Litera-
T he effectiveness of the tire ture at the vehicle's capacity
pressure monitoring system weight and the tire sizes instal -
will be impaired if you store led on the respective mode ls as
normal load pressures but then original equipment, or as a fac-
operate the vehicle at its maxi- tory option.
...
mum load¢&.
248 Tires and wheels
Remember, your safety and
that of your passengers also de pends on making sure that load
limits are not exceeded . Vehicle
load includes everybody and ev
erything in and on the vehicle.
These load limits are technical
ly referred to as the vehicle's
Gross Vehicle Weight Rating ("GVWR"). The Gross Axle
Weight Rating ("GAWR") is the
maximum load that can be ap
plied at each of the vehicle's
two axles. The Gross Vehicle
Weight Rating and the Gross
Axle Weight Rating are listed
on the safety compliance stick
er label located on the driver's
side B-pillar. The tire pressure
label on your Audi lists the
maximum combined weight of
all of the occupants and lug
gage or other cargo that the ve
hicle can carry. For the location
of the tire pressure label
¢fig. 195.
.&_ WARNING
-
Overloading a vehicle can
cause loss of vehicle control,
a crash or other accident, se
rious personal injury, and
even death. -Carry
ing more weight than
your vehicle was designed to carry will prevent the ve
hicle from handling properly
and increase the risk of a
loss of vehicle control.
-The brakes on a vehicle that
has been overloaded may not be able to stop the vehi
cle within a safe distance.
-Tires on a vehicle that has
been overloaded can fail
suddenly causing loss of
control and a crash.
-Always make sure that the total load being transported
- inclu ding the weight of a
trailer hitch and the tongue
weight of a loaded trailer -
does not make the vehicle
heavier than the vehicle's
Gross Vehicle Weight Rat
ing.
A WARNING
-Incorrect tire pressures
and/or underinflation can lead to a serious or fatal ac
cident.
-Inco rrect tire pressures
and/or underinflation cause
increased tire wear and can .,.
M N
0 <.J 'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
affect the handling of the
vehicle.
- Incorrect tire pressures
and/or underinflation can
also lead to sudden tire fail ure, including a blowout
and sudden deflation, caus
ing loss of vehicle control.
Checking tire pressure
The correct tire pressure for the
tires originally installed on
your vehicle is listed on the tire pressure label located on driver's side 8-pillar .
The recommended tire pres
sures are on the tire pressure
label and in the table
c> page 244, Cold t ire inflation
pressure.
This means that the
pressure must be checked and
adjusted when the tire has not
been driven for more than a
couple of miles (kilometers) at
low speeds during the previous
three hours . Air in the tires ex
pands when the tire heats up as
a result of internal friction as it
flexes in use . The tire pressure
is higher when the tire has
warmed up than when it is "cold."
Tires and wheels 249
It is the inflation pressure in a
"cold" tire that counts. There
fore, you should never let air out of a warm tire to match
"Cold tire inflation pressure"
re commendations
c> page 244 .
The tires would then be under
inflated and could fail sudden
ly.
The tire pressure label on your
Audi lists the recommended cold tire inflation pressures at
maximum capacity for the new,
original equipment tires that
were on your vehicle at the time
it was manufactured. For the
location of the label
c> page 244, fig. 195.
Most tires lose air naturally
over time . They can also lo se
some air if you drive over a pot hole or hit a curb while parking.
It is usually not possible to see
whether the radial tires used
today are underinflated just by looking at them .
Therefore , be sure to check tire
pressures at least once a month
and always before going on a long trip. Make sure to take the
number of people and the .,.
•
•
'
250 Tires and wheels
amount of luggage into ac-Never exceed the maximum in-
count when adjusting tire pres-flation pressure listed on the
sure for a trip -even one that tire sidewall for any reason.
you would not consider to be
Remember that the vehicle
"long." See
q page 2 52, Tires manufacturer, not the tire man-
and vehicle load limits for more ufacturer, determines the car-
important information. rect tire pressure for the tires
Always use an accurate tire on your vehicle.
pressure gauge when checking It is important to check the tire
and adjusting inflation pres- pressure when the tires are
sures. Check all of the tires and cold.
be sure not to forget the spare -Read the required tire pres-
tire. If the pressure in any tire is
sure from the tire pressure la-
too high when the tire is "cold,"
bel. The tire pressure label is
let air out of the tire slowly
located on the driver's side B-
with the edge of the tire gauge
pillar.
and keep checking the pressure
-Turn the valve stem cap coun-
until you reach the pressure
ter-clockwise to remove it
that is correct for the load (pas-
from the tire valve.
sengers and luggage) and kind
-Place the air pressure gauge
of driving you plan to do .
on the valve.
If the pressure in any tire is too -The tire pressures should only
low, note the difference be-
be checked and adjusted when
tween the pressure in the cold the tires are cold. The slightly
tire and the pressure you need
raised pressures of warm tires
and add the air that you need to must not be reduced.
reach the correct pressure for -Adjust the tire pressure to the
the vehicle load (passengers load you are carrying.
and luggage) for the tires on
-Reinstall the valve stem cap
your vehicle as listed on the on on the valve.
...
your vehicle and in this manual
and the kind of driving you plan
to do.
Tires and wheels 251
When should I check the tire -Incorrect tire pressure and/ •
pressure? or underinflation can cause • '
The correct tire pressure is es-increased tire wear and can
pecially important at high affect the handling of the
speeds . The pressure should
vehicle and stopping ability.
therefore be checked at least -Incorrect tire pressures
once a month and always be- and/or underinflation can
fore starting a journey. Do not also lead to sudden tire fail-
forget to check the tire pres- ure, including a blowout
sure for the spare wheel and sudden deflation, caus-
¢page 271. ing loss of vehicle control.
-The driver is responsible for
When should I adjust the
the correct tire pressures for ti re pressures?
Adjust the tire pressure to the all tires on the vehicle. The
applicable pressure values
load you are carrying. After
are located on a sticker on
changing a wheel
or replacing
the driver's side B -pillar.
wheels you have to adjust the
-Only when all tires on the
tire pressures on all wheels. In
vehicle are filled to the cor-
addition, you must then store
rect pressure, the tire pres-
the new tire pressures in the
sure monitoring system can
tire pressure monitoring sys-
work correctly.
tern
¢ page 267.
-The use of incorrect tire
.&, WARNING pressure values can lead to
Incorrect tire pressures and/ accidents or other damage.
or underinflation can lead Therefore it is essential that
sudden tire failure, loss of the driver observe the speci-
control, collision, serious per- fied tire pressure values for
sonal injury or even death. the tires and the correct
-When the warning symbol pressures for the function of
M (IJ appears in the instru-the tire pressure monitoring
N
0 ment cluster, stop and in- system. .,. <.J 'SI: ,....,
spect the tires. \!) 1.1'1 ,...., 1.1'1 ,....,
252 Tires and wheels
-Always inflate tires to the
recommended and correct
tire pressure before driving
off .
-Driving with underinflated tires bend more, letting
them get too hot resulting
in tread separation, sudden
tire failure and loss of con
trol.
-Excessive speed and/over loading can cause heat
build-up, sudden tire failure
and loss of control.
-If the tire pressure is too low or too high, the tires
will wear prematurely and the vehicle will not handle
well.
- If the tire is not flat and you
do not have to change a
wheel immediately, drive at
reduced speed to the near
est service station to check
the tire pressure and add air
as required.
@ Note
Driving without valve stem
caps can cause damage to
the tire valves. To prevent
this, always make sure that
factory installed valve stem caps on all
wheels are secure
ly mounted on the valve.
@) For the sake of the environment
Underinflated tires will also
increase the fuel consump
tion.
Tires and vehicle load limits
There are limits to the amount of load or weight that any vehi
cle and any tire can carry. Ave
hicle that is overloaded will not
handle well and is more diffi
cult to stop. Overloading can not only lead to loss of vehicle
control, but can also damage
important parts of the vehicle
and can lead to sudden tire fail
ure, including a blowout and
sudden deflation that can cause
the vehicle to crash.
Your safety and that of your
passengers also depends on
making sure that load limits are
not exceeded. Vehicle load in
cludes everybody and every
thing in and on the vehicle.
These load limits are technical
ly referred to as the vehicle's
Gross Vehicle Weight Rating
("GVWR "). .,..
254 Tires and wheels
to carry will prevent the ve
hicle from handling properly
and increase the risk of the loss of vehicle control.
-The brakes on a vehicle that has been overloaded may
not be able to stop the vehi
cle within a safe distance.
-Tires on a vehicle that has
been overloaded can fail
suddenly, including a blow
out and sudden deflation,
causing loss of control and a
crash.
-Always make sure that the total load being transported
- including the weight of a
trailer hitch and the tongue
weight of a loaded trailer -
does not make the vehicle heavier than the vehicle's
Gross Vehicle Weight Rat
ing.
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
pressure label)
~ page 244,
fig. 195.
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 244, fig. 195.
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. (1400-750
(5
X 150) = 650 lbs.)
5. Determine the combined weight of luggage and cargo .,..