My son-in-law just bought a beautiful 2004 S500 sedan, well equipped but without a CD changer. Only the single CD player/radio was installed.

I'd like to locate a good 6 changer for him, but the model numbers are a bit confusing to say the least.

Does some kind soul know which model changers will fit that car? Many thanks for your help.

Specifically, I would like the MBZ model numbers that will fit. For example, is the MC3010 the only one that will fit?

http://www.crutchfield.com/S-Gsn0huTVCD1/cgi-bin/prodview.asp?i=500CHAS634

that should be a good choice. MC3010 superceded the older MC3198 and is
reported to have better anti-skip tendancies. I understand (but not confirmed)
that MC3110 and MC3111 might even fit. As long as the changers are D2B fiber
optic compliant, it should be fine.