Porsche Cayman Owner's Manual page 233

Windows
The road dust which settles on the windshield
and windows contains particles of tire rubber
and oil residue. The interior trim and upholstery
release particles, particularly in strong sunlight,
which collect on the insides of the windows. These
deposits are augmented by impurities in the air
which enters the car through the fresh air vents.
Clean all windows regularly, inside and outside,
with Porsche window cleaner.
If you use a chamois leather for the windows,
do not use it for paintwork as it will otherwise
pick up a certain amount of preservative or
polish and could smear the windows and thus
impair vision.
Remove dead insects with the Porsche insect
remover.
Note
Door windows feature a water-repellent (hydropho-
bic) coating which prevents soiling of the windows.
This coating is subject to natural wear and can be
renewed.
Consult an authorized Porsche dealer.
Wiper blades
Wiper blades that are in perfekt condition are vital
for a clear view.
Replace the wiper blades twice per year
(before and after the cold season) or whenever
wiper performance deteriorates.
Periodically clean the wiper blades with
Porsche window cleaner, especially after the
vehicle has been washed in a car wash. If they
are very dirty (e.g. with insect remains), they
can be cleaned with a sponge or cloth.
Undercoating
The underside of your car is durably protected
against chemical and mechanical influences.
As it is not possible to exclude the risk of damage
to this protective coating in day to day driving,
it is advisable to have the underside of the car
inspected at certain intervals - preferably before
the start of winter and again in spring - and the
undercoating restored as necessary.
Your authorized Porsche dealer is familiar with
the bodyseal treatment procedures and has
the necessary equipment for applying factory
approved materials. We recommend that you
entrust them with such work and inspections.
Unlike conventional spray oils, undercoating and
rust-proofing compounds based on bitumen or wax
do not attack the sound-proofing materials applied
at the factory.
Warning!
Danger of re resulting in serious personal
injury or death.
Do not apply additional undercoating or
rust-proofing on or near the exhaust manifold,
exhaust pipes, catalytic converters or heat
shields. During driving the substance used for
undercoating could overheat and ignite.
Before applying fresh underseal, carefully
remove deposits or dirt and grease. Once it
has dried, the new undercoating compound
forms a tough protective coating which
provides efficient rust-proofing of the floor
panels and components.
Always apply a fresh coating of suitable
preservative to unprotected areas after
cleaning the underside of the body, the
transmission, the engine or carrying out
repairs to under-body, engine or transmission
components.
Effective rust-proofing is particularly important dur-
ing the cold weather season. If your car is driven
frequently in areas where salt has been spread
on the roads, the whole engine compartment
should be cleaned thoroughly after the winter to
prevent salt from causing any lasting damage. A
full under-body wash should also be performed at
the same time.
Maintenance, Car Care
231