Today I tried to do my Haldex filter + fluid change. I couldn't find many pictures here that still worked, and it seems my 2010 V50 fill plug was slightly different than the older models.
I was able to locate the filter housing, using a small ratcheting screwdriver set I was able to remove the two screws:
I left the filter in-place while I figured out the fill port. In some pictures, it shows the Diff/Haldex fill ports closer together and on the same surface. Mine seemed a bit different, but basically it is in the same position. Above the rear sway bar, closer to the front of the car than the rear differential.
I tried a 45 degree offfset wrench, a crow foot + ratchet and just a straight wrench but was unable to get the damn thing off.
Any further suggestions here?