Harmon Kardon Radio Button
I have a 2001 330i with the Harmon Kardon system. I took the car back to the dealer to fix an antenna problem, and they switched out the entire radio. The new radio has a button to the right of the presets that I don't understand. Previously, the left side of this button was RDS to tell the call letters of the station and the right side was PTY, which told the format of the station that was playing.
The new radio has RDS on the left side and TP on the right side. When I push the TP button the radio beeps, then does nothing. This button is not described in the manual for either the car or the radio. Does anyone know what this is?