The problem with Kenwood CD changers is that we never had a chance to get our hands on one of these. I suspect Kenwood (in contrast to Pioneer) uses a slightly different communications protocol with head unit. Having said this, I would seriously doubt SAAB deliberately implemented and supported two different versions of firmware on their cars just to support these two types of CD changers. It would not make sense to me. Then again it's SAAB in its quirkiness...
2001 9-5 SE V6; 2006 9-5 Wagon; iOS; BlueSaab version = "latest and greatest" :)