Lexus RX300 2003 Owner's Manual page 188

20R012b
Push the "AM", "FM1/2", "TAPE" or "CD" button to turn on
that mode. The selected mode turns on directly.
Push these buttons if you want to switch from one mode to
another.
If the tape or disc is not set, the cassette player or compact disc
player does not turn on.
You can turn off the cassette player by ejecting the cassette
tape. If the audio system was previously off, then the entire
audio system will be turned off when you eject the cassette
tape. If another function was previously playing, it will come on
again.
20R057
The applicable functions are shown in the lowest part of
the display. Push the switch just below to turn on each
function.
2003 RX300 from Aug. 02' Prod. (OM48442U)