Lexus 2003 LS Owner's Manual page 232

AUDIO
(b) Playing a compact disc
20L146c
Push the "DISC" button if the discs are already loaded in
the player.
"CD" appears on the display.
The discs set in the player are played continuously, starting
with the last disc you inserted. The disc number of the disc
currently being played, the track number and the time from the
beginning of the program appear on the display.
When play of one disc ends, the first track of the following disc
starts. When play of the final disc ends, play of the first disc
starts again.
The player will skip any empty disc number.
218
(c) Selecting a desired disc
20L147b
Push the button under the " " or " "signal to select the
disc number.
Push the button several times until the desired disc number
appears on the display. When you release the button, the
player will start playing the selected disc from the first track.