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- Incorrect tire pressures and/or underin-
flation can also lead to sudden tire fa il-
ure, including a blowout and sudden de-
flation, causing loss of vehicle control.
Checking tire pressure
The correct tire pressure for the tires original-
ly installed on your vehicle is listed on the tire
pressure label located on driver's side 8-pil-
lar .
The recommended t ire pressures 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
mo re tha n a couple of m iles (kilome t ers) at
low speeds during t he previous three hours.
Air in the tires expands when the ti re heats up
as a result of inte rna l friction as it flexes in
use. The tire press ure is higher when the tire
has warmed up than when it is "cold."
It is the inflat ion pressu re in a "cold" tire that
counts . Therefore, you shou ld never let air ou t
of a warm tire to match "Cold tire inflation
pressure" recommendations
c:>
page 234. The
tires would then be under inflated and could
fa il suddenly.
The tire press ure labe l on your Audi lists the
recommended cold t ire inflat ion pressures at
maximum capacity for the new, origina l
equ ipment tires that were on your vehicle at
the time it was manufactured.
For the loca-
tion of the label <=> page 234, fig . 189 .
Most tires lose a ir naturally
over
time. They
can also lose some a ir if you drive
over
a pot-
hole or hit a curb while parking. It is usually
not possible to see whether the radial t ires
used today are underi nflated j ust by looking
at them.
Therefore, be sure to check tire pressures at
least o nce a month and always before going
on a long tr ip. Make sure to take the number
of people and the amount of luggage into ac-
coun t when adjusting t ire pressure for a t rip -
even
one t hat you would not consider to be
Tire s an d wheel s
237
"long." See
c:>
page 2 38, Tires and vehicle
load limits for more important information.
Always use an acc urate tire pressu re ga uge
when checking and adju sting infla t ion pres -
s ures . Check all of the tires and be sure not to
forget the spare tire. If the pressure in any t ire
is too high when the tire is "cold", let a ir out
of the t ire s low ly with the edge of the tire
gauge and keep checking the pressure until
you reach the pressure that is correct for the
load (passengers and luggage) and kind of
driving you plan to do.
If the pressure in any tire is too low, note the
difference between the pressure in the cold
t ire a nd the pressure you need and add the air
that you need to reach the correct pressure for
t he vehicle load (passenge rs and luggage) for
the tires on you r veh icle as listed on t he on
your vehicle and in this ma nual and the kind
of driving you plan to do.
Never exceed the maximum inflation pres-
sure list ed on the tire sidewall for any rea-
son.
Remember that the vehicl e manufacture r, not
t he tire manufact urer, de t ermines t he cor rect
t ire press ure fo r t he t ires on your vehicle.
It is important to check the t ire pressu re whe n
the tires are cold.
- Read the required tire pressure from the t ire
pressure labe l. The t ire pressure label is lo-
cated o n the dr iver's side 8-pillar. The tire
pressure labe l lists the recommended cold
tire infla t ion pressures for t he vehi cle at its
maxim um capacity weigh t and t he tires that
were on your ve hicle at the time it was man-
ufactured . For recommende d tire pressures
for normal load conditions, please see chap-
ter
c:>
page 2 34.
- Turn the
valve
stem cap counter -clockwise
to remove it from the tire
valve.
- Place t he air pressure gauge on the
valve.
- The tire pressu res should only be checked
and adju sted when the tires are cold . The
slightly raised pressures of warm tires must
not be red uced.
Ill>-
•
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