I own 2008 BMW 335i. The Nokia N900 syncs with my Logic 7 car audio system, however only as a bluetooth head set. Basically, this means that you can only accept, reject and end phone calls once they come in. There is no phone book being transferred to the Logic 7 car audio. The issue is that the N900 uses obex data exchange which is missing the PBAP bluetooth profile. PBAP is the standard for phone book synchronisation between bluetooth capable devices. Almost the entire car industry uses it including the aftermarket manufacturers with their head units.