HONDA 2014 Ridgeline - Owner's Manual - Manual (Page 206)

Discs with scratches, dirty discs
CD-R or CD-RW may not play due
to the recording conditions.
Scratches and fingerprints on the
discs may cause the sound to skip.
Recommended discs are printed
with the following logo. Audio unit may not play the
following formats.
This audio unit cannot play a Dual-
disc .
5.
Protecting Your CDs
201
Fingerprints, scratches, etc.
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2014 Ridgeline