I recently bought an Audi A6 which came with a 6 cd changer, bose sound system and sat nav. I guess the interface is MMI 2g. I tried inserting a MP3 cd into the 6 cd changer and it is identified as a CD-ROM but greyed out. I read somewhere online that in late 2006 some cars got MP3 changers which can be enabled by software update. My car was originally purchased in Nov 2006. Is there some update on MMI which I can try out to see if MP3 works?