Subaru 2005 Legacy Owner's Manual page 283

Audio
" When there are CDs loaded:
Press a desired one of the "Disc select" buttons the
disc number indicator of which steadily lights up. The
player will then start playback of the selected CD, be-
ginning with the first track.
If you have inserted a disc that the player cannot read,
the player will show the elapsed time but will not pro-
duce any sound.
5-28
! To select a song from its beginning
" Forward direction
Briefly press the " " side of the TUNE/TRACK but-
ton to skip to the beginning of the next track. Each time
this side of the button is pressed, the indicated track
number will increase.