Lexus RX300 Manual page 155

AIR CONDITIONING AND AUDIO
(d) Operating tips
D Make sure the air inlet grilles in front of the windshield are not
blocked by leaves or other obstructions.
D If air flow control is not satisfactory, check the dashboard vents.
(See "Side vents" and "Rear vents".)
D To help cool down the interior after parking in the hot sun, drive
for the first few minutes with the windows open. After the excess
heat has blown away, close the windows.
D When driving on dusty roads, close all windows. If dust thrown
up by the vehicle is still drawn into the vehicle after closing the
windows, it is recommended that the air intake control button be
left to the OUTSIDE AIR mode and the fan speed control button
be pressed to anywhere except the "OFF" button.
D If following another vehicle on a dusty road, or driving in windy
and dusty conditions, it is recommended that the air intake control
button be temporarily pressed in to the RECIRCULATED AIR
mode, which will close off the outside passage and prevent
outside air and dust from entering the vehicle interior.
140
Side vents
20R009e
The side vents may be opened or closed as shown.