I was about to fit this unit into my vehicle but in the end I ended up fitting a Comand unit, so now this is available!
Model MF2810, part number A 171 870 42 94 (single CD)
This is an European unit, but coded by John to work in a US vehicle. Supports Bluetooth, AUX-in, and media interface
(if you have the cables/kits).
I'm also offering a leftover quadlock cable, can be purchased with the unit or by itself. It's the one from Frank, but I don't think it's needed for this install!
It's free if you want it.
This is a fairly easy retrofit if you have a pre-facelift SLK without Harman Kardon audio.
I haven't tested the unit myself, but John has. Everything seems to be working.
Letting the unit go for $275 + shipping. If you're in the LA area you can pick it up yourself if you want.