Cadillac 2005 XLR Owner's Manual page 258

CD Player
To use the player as a single music CD player, you
must first remove the navigation map DVD. While
playing a CD in the CD/DVD Player, the navigation
system is not available. The message "The disc installed
is not a map DVD" will appear on the display if any of
the navigation hard keys are pressed.
To remove the navigation map DVD and load a music
CD, use the following steps:
1. Start the vehicle.
2. Press the TILT hard key until you hear a beep. This
will open the faceplate of the system.
3. If one is loaded, the navigation map DVD will eject
from the slot.
4. Gently remove the navigation map DVD from the
slot and return it to its case.
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.
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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.
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.