how do i tell what firmware my radio has, im tring to install a DICE audio adapter but it says it requres a certain firmware and above.

i have a 2004 8 with non bose package.

also does anyone have a preference about what adapter to use between DICE Neocar, Audiolink and such im thinking of running it through the disc changer port in the back.

btw does the 2004 have the disc changer port on the back i would image it does but not 100% sure

thx