Cadillac 2007 XLR Owner's Manual page 306

5. Insert the music CD into the slot. The system
will pull the CD into the player.
6. Press and release the TILT hard key to close
the faceplate.
Notice: Shifting out of PARK (P) with the
system's faceplate open will cause the
faceplate to close automatically. This could
cause damage to a CD, DVD or the system if it
is partially loaded. Before shifting out of
PARK (P), make sure that the DVD or CD is
loaded properly. The vehicle must be shifted
back into PARK (P) to close the faceplate.
306
CD Player Screen
Once a music CD is loaded, the CD player menu
will appear on the display. When using the
system as a single CD player, the CD hard key
will alternate between the CD player and the
six-disc CD changer if CDs are loaded.