Porsche 2007 Cayenne Owner's Manual page 324

Parking at the curb
Danger!
Hard impacts against curbs (or traffic
islands) are dangerous and may cause hid-
den tire damage which is not noticeable until
later. Such damage can result in accidents at
high speeds causing serious personal injury
or death. Depending on the force of impact,
the edge of the rim can also be damaged.
f If you are in doubt, have the wheel checked by
an expert, particularly if you suspect damage
on the inside.
f If you must drive over a curb or other obstacle,
drive slowly and at an obtuse angle.
Exercise care when parking along curbs.
Maintenance Note
Tire repairs are not permissible under any circum-
stances.
324
Minor Repairs
Wheel alignment, wheel balancing
As a precaution, have wheels with summer tires
balanced in the spring, and those with mud and
snow tires before winter. Unbalanced wheels may
affect car handling and tire life.
Only the specified weights may be used for wheel
balancing.
Self-adhesive weights must not come into contact
with cleaning agents, since they could drop off.
Uneven tread wear indicates wheel imbalance. In
this event, the vehicle should be checked at an
authorized Porsche dealer.
Danger!
If, during a trip, uneven running or vibrations
occur that could be caused by damage to
tires or the car, the speed must be reduced
immediately, but without braking sharply. If
you continue your trip without having the
cause of the fault remedied, you might lose
control of your vehicle which could cause
serious personal injury or death.
f Stop the vehicle and check the tires.
f If no cause for the fault can be found, drive
carefully to the nearest authorized Porsche
dealer.
Removing and storing tires
f After changing, adjust tire pressure and torque
wheel bolts diagonally.
Please observe the chapter "CHANGING
WHEELS" on Page 332.
f Store tires in a cool and dry place. Rotate peri-
odically to avoid flat spots.
f Avoid contact with petrol, oil and grease.
The perception that tire durability and perform-
ance are not affected by storage and age is
unfounded.
Chemical additives, which make the rubber elas-
tic, lose their effectiveness over the course of
time and the rubber becomes brittle and cracks.
Therefore, the tires, especially the spare tire,
should be inspected from time to time.
The age of the tire can be obtained from the "DOT"
code number. If, for example, the last three num-
bers read 1207, then the tire was produced in the
12th week of 2007.
Example
FR (front right), FL, RR and RL.
f Wheels must always be fitted in accordance
with their marking.