Lexus GS430 User Manual page 332

AUDIO
G22052
The numbers of the trays where the CD is not set are dimmed.
308
(b) Playing a CD
G22026
Push the "DISC" button if CDs are already loaded in the
player.
The "CD CHANGER" screen 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 are shown 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 trays.