Controller Unit (PSE) A 203 820 25 85 (May have been replaced with A 203 820 51 85, now.)
E-Net Compensator :- A 203 820 39 26 (If you are using Orange or T-Mobile)
The above needs a power loom, but I don't have the part number (same connection as for the optical CD Changer though)
Fiber Optic Loom (Long) :- A 163 540 52 09
I'm afraid the main wiring loom that I have does not have a part number (this also comprises the microphone) - but the dealership should be able to advise - depends on what car you want to fit it to really as they will be different lengths. The one I had was very long, came from a CLK, I believe, and I trimmed it down to size as all the components have been located towards the front of the car (hidden behind steel plate in passenger footwell) ; Has Power, Ground, D2B Wakeup wire, Microphone, and one other wire (black & white) which I couldn't work out the purpose of, but seems to work fine with it not connected to anything !)
Cradle . . . . again, TBA - The one I have has a 208 part number, but believe that there are several to fit . . . will post the exact number on mine later.
S.