Page 274 of 369
274
Practical Tips, Minor Repairs
Tire traction
Warning!
When driving on wet or slushy roads, a
wedge of water may build up between the
tires and the road. This phenomenon is
known as “hydroplane“ and may cause par-
tial or complete loss of traction, vehicle con-
trol or stopping ability.
fReduce speed on wet surfaces to prevent this.Tire lifeTire life depends on various factors, i.e., road sur-
faces, traffic and weather conditions, driving hab-
its, type of tires and tire care.
fInspect your tires for wear and damage before
driving off. If you notice uneven or substantial
wear, wheels might need alignment or tires
should be balanced or replaced.
Tire wearThe original equipment tires on your Porsche have
built-in tire wear indicators. They are molded into
the bottom of the tread grooves and will appear as
approximately 1/2 in. (12 mm) bands when the
tire tread depth is down to 1/16 of an in (1.6 mm).
When the indicators appear in two or more adja-
cent grooves, it is time to replace the tires. We
recommend, however, that you do not let the tires
wear down to this extent.
Worn tires cannot grip the road surface properly
and are even less effective on wet roads.
In the United States, state laws may govern the
minimum tread depth permissible. Follow all such
laws.
Danger!
Driving on worn tires can result in loss of con-
trol of the vehicle and could cause serious
personal injuries or death.
fDo not drive with worn tires or tires showing
cuts or bruises as they may lead to sudden de-
flation and loss of control which could cause
severe personal injury.
fSpecialized high performance tires on high
performance sport utility vehicles exhibit more
wear than those on a family sedan, or even a
high performance sedan.
Therefore, it is important to check your tire
pressure and condition at least every two weeks.
fIf you notice that tires are wearing unevenly,
consult your Porsche dealer.
Uneven wear may not always be due to improper
wheel alignment. It can be the result of individual
driving habits such as cornering at high speeds. If
the tire pressure is not checked and adjusted reg-
ularly, abnormal tire wear can also occur.
Page 277 of 369
Practical Tips, Minor Repairs
277
Parking at the curb
Warning!
Hard impacts against curbs (or traffic is-
lands) are dangerous and may cause hidden
tire damage which is not noticeable until lat-
er. Such damage can result in accidents at
high speeds causing severe personal injury.
Depending on the force of impact, the edge
of the rim can also be damaged.
fIf you are in doubt, have the wheel checked by
an expert, particularly if you suspect damage
on the inside.
fIf 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.
Wheel alignment, wheel balancingAs 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 au-
thorized Porsche dealer.
Danger!
If, during a journey, uneven running or vibra-
tions occur that could be caused by damage
to tires or the car, the speed must be re-
duced immediately, but without braking
sharply. If you continue your trip without hav-
ing the cause of the fault remedied, you
might lose control of your vehicle which
could cause severe personal injury.
fStop the vehicle and check the tires.
fIf no cause for the fault can be found, drive
carefully to the nearest authorized Porsche dealer.
Page 367 of 369
Index
367
Securing against rolling ....................... 287
Storage.............................................. 313
Transport .................................... 28
,230
Washing ............................................. 257
Vehicle door
Locking ......................................... 20,24
Unlocking ............................................. 20
Vehicle key
Battery ............................................... 326
Vehicle-trailer combination stabilisation ......... 217
Ventilation ................................ 126
,127
,131
Vents ......................................................... 125
Central ...................................... 129,135
Footwell .................................... 129,135
Side .......................................... 129,135
Vertical coupling load .................................. 191
Voltmeter
Battery/generator warning ..................... 77
WWarning triangle.......................................... 175
Warnings ...................................................... 83
Washer fluid
Level.................................................. 243
Topping up ......................................... 243
Washer system, windscreen wipers ..... 120
,121
Washing ..................................................... 257
Water crossing ........................................... 224
Weights...................................................... 352
Wheel alignment ......................................... 277
Wheel bolts ................................................ 285
Removing .................................. 293,299
Wheel change ............................................. 279Wheels ..............................................262
,269
Adjusting ............................................277
Change .....................................286,293
Storing ...............................................278
Tracks................................................348
Wheel balancing .........................219,277
Windows ....................................................260
Windscreen wipers
Front ..................................................120
Rear ...................................................121
Windshield ................................129
,135
,243
Windshield wiper/washer stalk .....................119
Windshield wipers ..............................180,246
Blades................................................260
Switch ................................................119
Winter
Driving ...............................................313
Tires ..................................................348
Wiper blades .....................................246,260
Changing ...................................246,248
Working on your vehicle ...............................234