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Every three months (after regular cleaning) the
wheels should be coated with petroleum jelly.
R u b it in firmly with a soft cloth. N e v e r use ab-
rasive or metal polishing cleaning agents.
Explanation of pH value
The pH value is a measurement for the hydro-
gen-ion concentration in a liquid. This value
tells if the liquid reaction is sour (acid) or alka-
line (lye solution).
At a pH value of 7, the reaction of the liquid is
neutral (that is, chemically clean water), it is
not an acid or alkaline. Acids have a pH value
under 7, the strength of the acid increases with
a lower pH value. Alkaline lies between a pH
value of 7 and 1 4 , the strength of the alkaline
increases with higher pH values.
For example: a mineral water mixed with car-
bon dioxide has a pH value of 6 - 6.5, reaction
is also light sour. Battery acid in comparison
has a pH value of 1.
or
the pH value for normal soap solution is 8 - 9,
but the soap solution for a dishwasher is
approximately 1 2 . 5 , this would not be suitable
for wheel cleaning.
Your Porsche dealer can advise you which
product to use.
Remember that moisture and road salt on
brakes may affect braking efficiency. Test
the brakes after each car or wheel wash.
64
Interior
Glass
Use the same cleaning agents as for the ex-
terior and polish dry with a soft cloth or paper
towel.
Fabric
Use a vacuum cleaner or a soft bristle brush
to remove dust and loose dirt from carpeting,
upholstery, headliner and other trim. Dirt stains
can usually be removed with a lukewarm soap
water or an all purpose cleaner solution, or a
dry foam cleaner. For greasy, oily and other
stubborn stains, use a spot remover. Do not
pour the liquid on the fabric. Dampen a clean
cloth and rub carefully, starting at the edge
and working inward.
Seat belts
Keep belts clean. Very dirty belts may not
retract properly. Do not remove belts from the
vehicle to be cleaned. Do not use chemical
cleaning agents, bleach or dyes. They con-
tain corrosive properties which will weaken
the webbing. Do n o t allow inertia reel safety
belts to retract before they are completely
dry.
For cleaning, use a mild soap water solution.
Let belts dry out thoroughly and away from
direct sun light.
Plastic, vinyl and leatherette
Use a clean, damp cloth or sponge to keep
this trim free from dust. F o r other soilage, u s e
a lukewarm all purpose cleaning solution or a
mild saddle soap for vinyl and leather trim.
Remove water spots and soap traces with a
clean, damp cloth or sponge. U s e a clean, soft
cloth to rub dry.
Grease, tar or oil stains can be removed with
a clean cloth or sponge soaked with all pur-
pose cleaner or with a solvent type vinyl or
leather cleaning agent.
Occasionally apply a colorless vinyl or leather
preservative to retain the material's l u s t e r and
pliability.
Leather and leather trim
To keep leather seats and trim beautiful and
soft, they should be cleaned and cared for
regularly. Clean leather with a soft, white
woolen cloth and a mild soap water solution.
Do not use chemical or abrasive cleaning
agents. Do not let moisture seep through per-
forated surfaces to safeguard against corro-
sion and cracking from underneath. After
cleaning, apply a leather preservative recom-
mended by Porsche to all dry surfaces with a
clean and soft woolen cloth. L e t your P o r s c h e
dealer advise you on the use of the leather
preservation product.
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