That's the whole retrofit harness, you don't need all that you just need the last pic, that's all.

This is the correct converter, plug <- this into the ULF and -> into your loom.



This is the only bit you need, it "should" be no more than like $60.

Buying the bits separately (plugs and pins) from the dealer would be approx $40.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.