[dachrist]

Originally Posted by Blackroot

It works ! Just hooked it up to the new navigation radio and all the MOST fiber factory Bose speakers and amp work.

Well worth the 95$ if you want to keep your factory setup, which isn't that bad
product here:
https://www.amazon.com/Optical-Decoder-Mercedes-Porsche-Cayenne/dp/B07J463FM7/ref=asc_df_B07J463FM7/?tag=hyprod-20&linkCode=df0&hvadid=241923266288&hvpos=1o2&hvnetw=g&hvrand=13071146121029346864&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9024568&hvtargid=pla-601136414355&psc=1

My car: 2004 S special edition with Bose

So all you had to do was plug that decoder between the amp and your new radio and everything worked?