Porsche Cayenne 2005 Owner's Manual page 130

ECON mode
The outside air that is flowing in does not dry up if
the air-conditioning compressor is switched off.
Warning!
Risk of accident due to hampered vision.
If the air-conditioning compressor is
switched off, the windows may mist up.
f Do not switch off the air-conditioning compres-
sor in damp weather.
Switching air-conditioning compressor off
Whenever outside temperatures exceed 37.4°F
(3°C), the air-conditioning compressor is always
switched on in automatic mode.
The compressor can be switched off to save fuel,
but control comfort is then limited:
f Press ECON button M.
The ECON logo appears on the air-conditioning
display panel.
The air-conditioning compressor is switched
off.
Switching air-conditioning compressor on
f If the interior temperature is too high:
Press ECON button M or
Press AUTO button C.
130
Controls, Safety, Instruments
Information on air-conditioning
compressor
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The air-conditioning compressor:
– Can switch off briefly if engine is under an ex-
treme load to ensure sufficient engine cooling.
– Switches off automatically at temperatures be-
low approx. 37.4°F (3°C) and cannot be
switched on, even manually.
– Operates most effectively with windows
closed.
If the car has been in the sun for a long time,
however, it is a good idea to ventilate the
interior briefly with the windows open.
Notes on operation
Depending on the outside temperature and humid-
ity, condensation can drip from the evaporator
and form a pool under the car.
This is normal and not a sign of leakage.
If uncooled air flows out when the lowest temper-
ature has been set ("LO"), switch off the air-condi-
tioning compressor and have the fault remedied at
an authorized Porsche dealer.
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REST mode
Using engine residual heat
The residual heat of the engine can be used to
heat the interior up to 20 minutes after the ignition
has been switched off.
f Press REST button N.
The air-conditioning settings cannot be
changed in REST mode.
Ending the function
f Press REST button N.
Note on operation
If the battery positive voltage is too low, REST
mode is automatically ended.
f Please observe the chapter "WARNING LIGHTS
AND WARNING MESSAGES" on Page 106.