Cadillac 2005 XLR Owner's Manual page 240

Main Audio Menu
z
e / (Audio/Adjust): Press this key to view the
main audio screen.
4-46
Preset Selection: Here you can program the audio
system's presets to recall your home settings by
touching HOME. You can also recall the presets you
use when traveling to another area by touching AWAY.
See "Preset Station Menu" later in this section for
more information on how to store preset stations.
The Home and Away feature is not available for the
XM™ Satellite Radio source, if equipped.