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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
r:=>
page 187, Cold tire inflation pressure . This
means that the pressure must be checked and
adju sted when t he tire has not been driven for
mo re than a couple of mi les (kilometers) at
low speeds during the previous three hours.
Air in the tires expands when the tire heats up
as a result of internal fr iction as it flexes in
use. The tire pressure is higher when the tire
has warmed up than when it is "cold".
It
is the inflation pressure in a "cold" tire that
counts. Therefore, you shou ld never let air out
of a warm tire to match "Cold tire inflation
pressure" recommendations
c>
page 187. The
tires would then be under infla ted and could
fa il suddenly.
The tire pressure label on your Audi lists t he
recommended cold t ire inflat ion pressures for
the new, or igina l equipment tires that were
on your vehicle at the t ime it was manufac-
tured. For the location of the label
r=> p age 187, fig. 148.
Most tires lose air natu rally over time. They
can also lose some air if you dr ive over a pot-
hole or hit a curb while parking.
It
is usually
not possible to see whet her t he radial t ires
used t oday are underi nf lated just by looking
at them.
Therefore, be sure to check tire pressures at
least once a month and always before going
on a long t rip. Make sure t o t ake the number
of people and the amount of luggage into ac-
count when adjusting tire pressure for a trip -
even one that you would not consider to be
"long". See r:=> page 190, Tires and vehicle
load limits for more important information.
Always use an accurate tire pressure gauge
when checking and adjusting inflation pres-
sures. Check all of the t ires. If the pressure in
Tire s an d wheel s
189
any tire is too high when the tire is "cold", let
air out of the tire slowly with the edge of the
tire gauge and keep checking the pressure un-
ti l you reach the pressure that is correct for
the load (passengers and luggage) and kind of
driv ing you plan to do.
If the pressure in any ti re is too low, note the
difference between the pressure in the cold
tire and the pressure you need and add the air
that you need to reach the correct pressure for
t he vehicle load (passengers and luggage) for
the tires on your vehicle as listed on the on
you r vehicle and in this ma nual and the kind
of driving you plan to do.
Never exceed the max imum inflation pres-
sure listed on the tire sidewall for any rea-
son.
Remember that the vehicle manufacturer, not
t he tire manu f actu rer, determines t he correct
ti re pressure fo r t he tires on your vehicle.
It is important to check the t ire pressure when
the tires are cold.
- Read the required tire pressure from the t ire
pressure label located on drive r's side B-pil-
lar.
- Turn the valve stem cap counter-clockw ise
to remove it from the tire valve.
- Place the air pressure gauge on the valve.
- The tire pressures should only be checked
and adju sted when the tires are cold. The
slightly raised pressures of warm tires must
not be reduced.
- Adj ust the tire pressure to the load you are
carrying.
- Reinstall the valve stem cap on the valve.
When should I check the tire pressure?
The correct ti re pressure is especially impor-
t ant at high speeds. The pressure should
therefore be checked at least once a month
and always before starting a jo urney.
When should I adjust the tire pressures?
Adjust the t ire pressure to the load you are
carrying. After chang ing a whee l or rep lacing
.,..
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