flat tire AUDI S4 2015 User Guide

236 Tires a nd whee ls
If you wish to improve comfort See the illustration ¢ fig. 189
when operating the vehicle at for the location of the label 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 vehicle 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 a t the time of going to
the ti re pressures to those press and is subject to change .
specified for maximum vehicle In the event of discrepancies ,
load¢&. the tire p ressure labe l is locat-
Bear in mind that the tire pres- ed on the driver's side 8-pi llar
sure monitoring system* can a lways takes precedence .
on ly monitor the tire pressures
The table be low lis ts the rec -
you have sto red . The system
ommended cold tire inflation
does not recogn ize t he load
pressures for the Audi model
condition of your vehic le.
covered by your Owner's Li tera-
T he effect iveness of the tire ture at the veh icle's capac ity
p ressure mon itor ing system* weight and the tire sizes instal -
will be impaire d if you st ore led on the respect ive mode ls as
normal load press ures but then original eq uipment, or as a fac -
operate the vehicle at its max i- tory optio n.
...
mum load¢&.

238 Tires and wheels
else or you bought the vehicle
with different rims/tires or you bought the vehicle as a previ ­
ously owned vehicle.
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
h icle can carry . For the location
of the tire pressure label
¢fig . 189.
.&_ WARNI NG -
Overloading a vehicle can
cause loss of vehicle control,
a crash or other accident, se­
rious personal injury, and
even death.
-Carrying 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 with in 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
- 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 Rat­ing.
.&_ WARNI NG
-Incorrect tire pressures
and/or underinflation can
-

lead to a serious or fatal ac­
cident.
- Incorrect tire pressures
and/or underinflation cause increased tire wear and can
affect the handling of the
vehicle .
-Incorrect tire pressures and/or underinflation can
also lead to sudden tire fail­ure, 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 234, Cold tire 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
Tires and wheels 239
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 " ld ,, co .
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" recommendations
c:> page 234.
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 234, fig. 189.
Most tires lose air naturally
over time. They can also lose
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.
•
•
'

240 Tires and wheels
Therefore, be sure to check tire and luggage) for the tires on
pressures at least once a month your vehicle as listed on the on
and always before going on a your vehicle and in this manual
long trip. Make sure to take the and the kind of driving you plan
number of people and the to do.
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
¢ page 242, Tires
manufacturer, not the tire man-and vehicle load limits for more
important information. ufacturer, determines the cor-
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
be sure not to forget the spare cold
.
tire. If the pressure in any tire is -Read the
required tire pres-
too high when the tire is "cold", sure from the tire pressure
la-
let air out of the tire slowly bel.
The tire pressure label is
with the edge of the tire gauge located
on the driver's side B-
and keep checking the pressure pillar. The tire pressure label
until you reach the pressure lists the recommended cold
that is correct for the load (pas- tire inflation
pressures for the
sengers and luggage) and kind vehicle at its maximum capaci-
of driving you plan to do. ty weight and the tires that
If the pressure in any tire is too were on your
vehicle at the
time it was manufactured. For
low, note the difference be-
tween the pressure in the cold recommended
tire pressures
for normal load conditions,
tire and the pressure you need
please see chapter
and add the air that you need to
¢page 234. ...
reach the correct pressure for
the vehicle load (passengers

Tires and wheels 241
-Turn the valve stem cap coun- ize the new tire pressures in the •
ter-clockwise to remove it tire pressure monitoring sys-• '
from the tire valve. tern*
¢ page 257.
-Place the air pressure gauge
A WARNING
on the valve.
Incorrect tire pressures and/
-The tire pressures should only or underinflation can lead
be checked and adjusted when sudden tire failure, loss of
the tires are cold. The slightly control, collision, serious per-
raised pressures of warm tires sonal injury or even death.
must not be reduced. -When the
ti] warning sym-
-Adjust the tire pressure to the bol appears in the instru-
load you are carrying. ment cluster, stop and in-
-Reinstall the valve stem cap spect the tires.
on the valve. -Incorrect tire pressure and/
When should I check the tire or underinflation can cause
pressure? increased tire wear and can
The correct tire pressure is es- affect the handling of the
pecially important at high vehicle and stopping ability.
speeds. The pressure should -Incorrect tire pressures
therefore be checked at least and/or underinflation can
once a month and always be- also lead to sudden tire fail-
fore start ing a journey. Do not ure, including a blowout
forget to check the tire pres- and sudden deflation, caus-
sure for the spare wheel. ing loss of vehicle control.
When should I adjust the
-
The driver is responsible for
the correct tire pressures for
tire pressures?
all tires on the vehicle. The
Adjust the tire pressure to 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
'"" N
0 tire pressures on all wheels. In ::.,: co ....
addition, you must then initial-\!) 1.1'1
.... 1.1'1 ....

242 Tires and wheels
-Only when all tires on the
vehicle are filled to the cor­ rect pressure, the tire
pressure monitoring sys­
tem* can work correctly.
-The use of incorrect tire
pressure values can lead to
accidents or other damage.
Therefore it is essential that
the driver observe the speci­
fied tire pressure values for
the tires and the correct pressures for the function of
the tire pressure monitoring
system*.
-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.
(D 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
...

Tires and wheels 243
and can lead to sudden tire fail- The Gross Axle Weight Rating •
ure, including a blowout and ("GAWR") is the maximum load • '
sudden
deflation that can cause that can be applied at each of
the vehicle to crash. the vehicle's two axles.
Your safety and that of your The Gross Vehicle Weight Rat- passengers also depends on ing and the Gross Axle Weight
making sure that load limits are Rating are listed on the safety
not exceeded. Vehicle load in- compliance sticker label locat-
eludes everybody and every- ed on the driver's side B-pillar.
thing in and on the vehicle. Your Audi has 5 seating posi-
These load limits are technical- tions, 2 in the front and 3 in the ly referred to as the vehicle's rear for total seating capacity
Gross Vehicle Weight Rating of 5. Each seating position has
("GVWR"). a seat belt¢
page 136~ Safety
The "GVWR" includes the belts.
weight of the basic vehicle, all The fact that there is an upper
factory installed accessories, a limit to your vehicle's Gross Ve-
full tank of fuel, oil, coolant hicle Weight Rating means that
and other fluids plus maximum the total weight of whatever is
load. The maximum load in- being carried in the vehicle (in-
eludes the number of passen- eluding the weight of a trailer
gers that the vehicle is intend- hitch and the tongue weight of
ed to carry ("seating capacity") the loaded trailer) is limited.
with an assumed weight of The more passengers in the ve- 150 lbs. (68 kg) for each pas- hicle or passengers who are
senger at a designated seating heavier than the standard
position and the total weight of weights assumed mean that
any luggage in the vehicle . If less weight can be carried as
you tow a trailer, the weight of luggage. the trailer hitch and the tongue The tire pressure label on your
'"" weight of the loaded trailer N
Audi also lists the maximum 0 ::.,:
must be included as part of the co .... combined weight of all of the \!) 1.1'1
vehicle load . .... 1.1'1 ....

244 Tires and whee ls
occupants and luggage or other
cargo that the vehicle can carry .
For the location of the label
¢ page 234, fig . 189 .
A WARNI NG
-~
Overload ing a vehicle can
cause loss of vehicle control,
a crash or other accident, se ­
rious personal injury, and
even death.
- Carrying more weight than
your vehicle was designed to carry will prevent the ve­hicle 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 veh icle 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 be ing transported
- including the weight of a
traile r hitch and the tongue
weight of a loaded traile r -
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 weigh t of the
passengers and luggage or oth ­
er th ings that you p lan to trans­
port so that you can make sure
that your vehicle w ill not be
overloaded .
Steps for Determining
Correct Load Limit
1. Locate the statement "THE
COMBI NED WEIGH T OF OC­
CUPANTS AND CARGO
SHOULD N EVER EXCE ED XXX
KG OR XXX LBS"on your vehi­
c le's placard (tire inflation
pressure label)
¢ page 234,
fig . 189 .
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" k ilo­
grams or
"XXX" pounds

248 Tires and wheels
New tires and replacing
tires and wheels
New tires and wheels have to
be broken in.
Fig. 193 Tire specification codes on
the sidewall of a tire
No. Description
CD Passenger car tire (where
applicable)
@ Nominal width of tire in
millimeters
@ Ratio of height to width
(aspect ratio)
© Radial
® Rim diameter code
® Load index and speed rat-
1ng
(j) U.S. DOT tire identifica -
tion number
No. Description
® Audi Original tire
® Sever snow conditions
@ Tire ply composition and
materials used
@ Maximum load rating
@ Treadwear, traction and
temperature grades
@ Maximum permissible in-
flation pressure
The tires and rims are essential
parts of the vehicle's design.
The tires and rims approved by
Audi are specially matched to
the characteristics of the vehi­
cle and can make a major con­
tribution to good road holding and safe handling when in good
condition and properly inflated
¢ A .
We recommend that all work
on tires and wheels be per­
formed by an authorized Audi
dealer. They are familiar with recommended procedures and
have the necessary special tools
and spare parts as well as the
proper facilities for disposing of
the old tires.
Authorized Audi dealers have
the necessary information

252 Tires and wheels
Maximum Permissible
Inflation Pressure
This number is the greatest
amount of air pressure that
should ever be put in the tire
under normal driving condi­
tions.
.&_ WARNING
-Using incorrect or unmatch­ ed tires and/ or wheels or improper tire and wheel
combinations can lead to loss of control, collision and
serious personal injury.
-Always use tires, rims and wheel bolts that meet the
specifications of original
factory-installed tires or
other combinations that have been specifically ap­
proved by the vehicle manu­
facturer.
-Tires age even if they are
not being used and can fail
suddenly, especially at high
speeds. Tires that are more
than 6 years old can only be used in an emergency and
then with special care and
at lower speeds.
-Never mount used tires on your vehicle if you are not sure of their "previous
histo­
ry." Old used tires may have
been damaged even though
the damage cannot be seen
that can lead to sudden tire
failure and loss of vehicle
control.
-All four wheels must be fit­ ted with radial tires of the
same type, size (rolling cir­
cumference) and the same
tread pattern. Driving with different tires reduces vehi­
cle handling and can lead to
a loss of control.
-If the spare tire is not the
same as the tires that are
mounted on the vehicle -for
example with winter tires -
only use the spare tire for a
short period of time and
drive with extra care. Refit
the normal road wheel as soon as safely possible.
-Never drive faster than the maximum speed for which
the tires on your vehicle are
rated because tires that are
driven faster than their rat­
ed speed can fail suddenly.
-Overloading tires cause heat build-up, sudden tire fail ­
ure, including a blowout
..