Cadillac Automobile Owner's Manual page 204

1. Turn counterclockwise one notch
to go to the start of the current
chapter/track, turn it again to go
to the previous chapter/track.
2. Turn clockwise to go to the next
chapter/track.
Sound quality can be reduced due
to disc quality, recording method,
quality of the music recorded, and
how the disc has been handled.
Handle discs carefully and store
them in their original cases or other
protective cases away from direct
sunlight and dust. If the bottom
surface of a disc is damaged, the
disc may not play properly or at all.
Do not touch the bottom surface of
a disc while handling it; this could
damage the surface. Pick up discs
by grasping the outer edges or the
edge of the hole and the outer edge.
If the bottom surface of a disc is
dirty, take a soft lint free cloth,
or dampen a clean soft cloth in a
mild neutral detergent solution
mixed with water, and clean it. Wipe
the disc from the center to the
outer edge.
Do not add any label to a CD or
DVD, it could get caught in the
player. If a CD or DVD is recorded
on a personal computer and a
description label is needed, try
labeling the top of the recorded CD
or DVD with a soft marker.
If Disc Read Error appears on the
display and/or the CD/DVD comes
out, it could be for one of the
following reasons:
If a CD was inserted with an
invalid or unknown format.
If a DVD is not from a correct
region.
It is very hot. When the
temperature returns to normal,
the CD should play.
You are driving on a very rough
road. When the road becomes
smoother, the CD/DVD
should play.
The CD/DVD is dirty, scratched,
wet, or upside down.
The air is very humid. If so, wait
about an hour and try again.