[100K+]

Hi, I'm a bit confused as to where the oil leak is actually from. You say the Haldex, but then describe the DEM unit setup. I'm assuming its the DEM as I have no recollection/memory of any electrical components as you describe, other than the DEM on the Haldex.
If I'm correct, then the only way oil can get into the DEM is via either the pressure switch housing or the solinoid housing. I'd suspect the solinoid housing as it has an "O" ring seal, which I assume is an oil seal, which in your case could be damaged/missing. This would allow oil to pass into the "inside" section of the DEM. I'll then assume there is a passage way between the "inside section" and the "outside section" of the DEM. Once in the outside section of the DEM it then weeps out from the "renewed" seal that Lucas installed when he repairs the DEM electronics. ( hope you follow)
If i'm wrong lets know & I'll have another think.




Cheers

Bob