Lexus RX300 Manual page 147

AIR CONDITIONING AND AUDIO
AUTOMATIC AIR CONDITIONING CONTROLS
"The automatic air conditioning automatically maintains the set
temperature.
This air conditioning features automatic fan speed and air flow
control which automatically selects the most suitable fan speed
and air flow to control the temperature. The ignition key must be
in the "ON" position.
132
20R001b
To prevent the battery from being discharged, do not leave the air
conditioning on longer than necessary when the engine is not
running.
NOTICE