It all changed, and MB don't do an iPod kit for the new (NTG4.5) system.
if you have Audio-20 with CDC then you have to retrofit Media Interface .. if you have the basic Audio-20 then you have no fibre optic port and there is no MB solution ...
I keep on meaning to work out how to modify an NTG4 iPod kit for NTG4.5, but there aren;t enough wires in the loom to make it work properly I think ...
If you are unable to use interface are you looking to sell it? If so could you PM me . I have a W204 2008 with Comand and in dash 6 CD player, I am not sure if your kit is the one I need. Thanks