I'm new to this forum and have a question for all you TT audio enthusiasts. I have a 2003 180 with the stock Audi Concert system. Was wondering what type of homemade CDs the system would play without any problems (i.e., CD +R, CD -R, CD RW, etc.). I tried using the search engine on this site, but kept getting an error message. Thanks in advance for any assistance. Looking forward to years of fun with my TT!