Porsche cayman gt4 Owner's Manual page 179

Cleaning windows
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Clean all windows regularly, inside and out,
with window cleaner.
We recommend Porsche window cleaner.
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Do not use the same chamois for painted
surfaces and for drying the windows.
Preservative residues could reduce
transparency.
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Remove insect residues with insect remover.
Information
The door windows have a water-repellent
(hydrophobic) coating, which prevents soiling of
the windows.
This coating is subject to natural wear and can be
renewed.
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Please contact an authorized Porsche dealer.
Care of windshield wiper blades
Windshield wiper blades that are in perfect
condition are vital for a clear view.
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Please see the chapter "WIPER BLADES"
on page 168.
Repairing the underbody protection
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.
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Exhaust system fire risk
WARNING
The exhaust system becomes very hot when the
engine is running. Flammable material close to the
exhaust system could ignite. Additional
undercoating or rust protection agents on or near
the exhaust system can become too hot when
driving and ignite.
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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.
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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.
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Always apply a fresh coating of suitable
preservative to unprotect 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
during 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 underbody wash should also be
performed at the same time.
Maintenance and Car Care
177