Replacing Bose stereo with Din 2 question

[Heiko]

If you have the 2005 Bose it's definitely fiber wiring (well partially fiber)
Porsche AMP main page
The problem with all this is that the factory stereo is coded through the PIWIS system, so i'm not sure if anything
has to be recoded if you take it out and replace it. This is where the old stuff is so much easier to work with.
Sorry I cant be of more help...