Are there any good code reader tools for porsche to promote?How about Autocom CDP?

[flexstaff]

Hi All,Can anyone help.
I have looked in other posts but can't find answer.
When I press source button on steering wheel radio display goes to AUX, I press again and it goes back to preset radio station.I thought the source button would allow you to change from FM1 to FM2 to AM to CD etc or have I misread instruction manual.Acenta with type B radio.Are there any good code reader tools for porsche to promote?How about Autocom CDP ?Any information will be appreciate