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I have the following:
2004 C240 Wagon
Factory Radio with Weather band as well as AM/FM, Cassette and fMB 6-CD Changer.
Radio code: 12226
The print out of the option codes specifies the following:

531 "Preinstallation satellite radio.
#819 "CD changer, MP3 capable, for 6.

My questions are two-fold:
1) what do I need to buy or have MB do the use the satellit radio feature

and

2) how can I access the MP3 feature (I read somewhere about a aux-in via the glovebox, there is only a dimple in the box, no line in plug).

Any help would be appreciated, MB seems to want to sell me a upgraded radio system, 1,000's of $$

Thanks!
Sincerely - MBRedCloud[/align]