Porsche 928 GTS 1994 Owner's Manual page 84

Light lenses and plastics
Use only soap and water solution for cleaning
the plastic light lenses. Never use chemical
cleaning agents for this purpose. The same ap-
plies to other plastic parts and plastic films.
Door, roof, lid and window seals
Rubber seals tend to age and become brittle or
crack if they are not treated occasionally with
glycerine or talcum powder.
Light alloy wheels
Pitting may occur if metallic particles which
cause contact corrosion (e.g. brass or copper in
brake dust) are allowed to remain on the alum-
inium for too long.
Regular care is necessary in order to retain the
attractive surface finish. The wheels should be
washed down with a sponge or wash brush
about every two weeks. In areas where salt is
spread on winter roads or there is a lot of air-
borne industrial dust, it is best to clean the
wheels weekly.
The Porsche Light Alloy Wheel Cleaner (pH-value
9.5) can be used for this purpose.
If the pH-value of the detergent is incor-
rect, the protective coating on the wheels
will be destroyed.
Every three months you should coat the wheels
with a non-corrosive grease (vaseline) after
cleaning. Using a clean cloth thoroughly rub the
grease into the surface.
Polishes which dissolve
frequently used for other metals, or abra-
sive tools or agents are unsuitable because
they break down the oxide film of the pro-
tective coating and will cause discoloration
of the wheel.
Leather care
Leather is a natural material. The tanned hide is
a product of nature. The natural surface mark-
ings of leather skins, such as creases, healed
scratches, insect bites, structural differences
and slight variations in shade and grain add to
the attractiveness of the real leather product.
We recommend that the leather be treated or
cleaned initially after the first few weeks or after
the car has covered a few thousand miles. Only
by doing so can the leather patina, which em-
phasizes the inherent qualities of the leather
upholstery, begin to form.
Cleaning is best performed with a white, soft
woolen cloth and a cleaning agent with a neutral
soap basis (mild soap and water solution). If the
leather is heavily soiled the Porsche Cockpit
Cleaner can also be used. Please follow the in-
structions on the containers carefully.
Do not use aggressive cleaners or hard objects.
Take special care not to dampen the other side
of the perforated leather trims.
oxides, as
Once you have cleaned the leather (especially
the heavily used leather seats) treat it with the
Porsche Leather Care Agent. Leather should be
cleaned and treated several times a year, de-
pending on how quickly it becomes dirty.
Fabric, upholstery and carpets
Use only a vacuum cleaner or a medium stiff
brush. Remove stains and spots with Porsche
stain remover.
The Porsche range of accessories includes
floormats to protect the carpets in Summer and
Winter.
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