I got a hold of a slightly used 2010 CX-9 Bose CD-Changer unit. Does anyone here know if I can connect it to my 2007 non-Bose equipped CX-9? I was able to connect it and mount it and it powers up fine. However, when I turn up the volume it only goes up to one level (low) no matter if it is at level 1 or level 50 volume. It also does not sound clear, sort of staticky. If anyone out there knows what I have to do to make this head unit work properly I would greatly appreciate it. If I can't make it work, I will have a 2010 Mazda CX-9 Bose CD-Changer/MP3 head unit for sale.