I recently purchased a 2006 3s GT with the Bose system. I figured that with this HU and the 6 disc CD changer that I could play MP3 CDs. I burned one (just used windows burning utility with just the MP3s in the root dir) and I was suprised that it did not play. This was quite frustrating. I look on here and while I can't find anyone specifically say that their Bose system plays MP3s, I find many clues saying that it can. I've seen older for sale listings for a 2006 Mazda 3s GT with Bose and a 6-disc CD / MP3 changer. Did Mazda offer the option of the Bose system without MP3 support? Did I get screwed out of MP3 support and the aux in?