Might be this, as found in the 2011 owners manual:
Available only in FM mode. This feature allows you to search
RDS-equipped stations for a certain category of music format: CLASSIC,
COUNTRY, JAZZ/RB, ROCK, etc.
To activate: Press MENU repeatedly until RDS (ON/OFF) appears in the
display. Use SEEK to switch RDS ON and OFF. When RDS is
OFF, you will not be able to search for RDS equipped stations or view
the station name or type
TEXT: Press and release to display
the artist and song title. While in
TEXT MODE, press again to scroll
through the Artist (AR), Song (SO), Channel (CH) and Category (CA).
In TEXT MODE: Sometimes the display requires additional text to be
displayed. When the < / > indicator is active, press TEXT and then
press SEEK to view the additional display text.
It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.