Here is one hint that I've figured out. The RF system in the X'es that have RDS is not perfect. If you find it isn't working as you think it should, say it's not displaying anything but the display shows you have an RDS signal, try turning the stereo off for a few seconds and then back on. Sometimes it doesn't seem to get set up right when it first receives a signal. Restarting the system with the signal seems to help - sometimes.

That said, remember that RDS is based on a signal sent by the station. Your stereo has nothing to do with WHAT it displays. That is, it will display whatever the station sends. The station controls what it wants displayed. If your display went to "Rock" for example for a while and then "started working again", the station changed what they were sending in the signal. This is common. I listen to a local station here that changes their content of the RDS signal all the time. Usually it shows the artist and the track title, but not always.

-G