Porsche Boxster Owner's Manual page 182

Any portable telephone or radio transmitter which
is used in a Porsche must be properly installed
in accordance with the technical requirements of
Porsche.
The transmission power must not exceed
10 W. The devices must possess a type approval
for your vehicle and have an "e" symbol.
If you should require equipment with transmission
power values greater than 10 W, please consult
your authorized Porsche dealer for this purpose.
He is familiar with the technical requirements for
installing devices of this kind.
The antennas for all radios and telephones with a
transmitting antenna must be externally mounted.
The improper installation of radios or telephones
or use of a radio or telephone with a transmitting
antenna inside the car may cause the warning
lights to come on.
Improper installation of such equipment can create
a discharged battery or excessive current draw
from added equipment.
If aftermarket systems are installed by non-deal-
ership technicians or outside the selling dealer,
problems may result. Installation of aftermarket
equipment is not covered under the New Car War-
ranty.
Consult your authorized Porsche dealer about
the installation of non Porsche approved
equipment.
180
Controls, Instruments
Hands-free microphone
Hands-free microphones A installed at the factory
must be adapted to the type of telephone in use.
Your authorized Porsche dealer will be pleased to
advise you.
Reception quality
The reception quality of your car telephone
will change constantly when you are driving.
Interference caused by buildings, landscape and
weather is unavoidable. It may become particularly
difficult to hear when using the hands-free function
due to external noise such as engine and wind
noise.
Automatic car-wash
Unscrew the external antennas before using an
automatic car-wash.