Hi folks don't know whether I should put this in the b8 Audi a4 forum or here, my Audi concert stereo in 2008 b8 a4 has SD card reader but it won't accept any modern cards 4gb upwards. I have an old 2gb that works fine but 4gb and 16gb cards don't work at all. I hear that there is an update for the stereo that unlocks the SD reader to new cards. Is this true and if so is only Audi dealer able to do it or can it be done else where. Cheers