I have the craftsman Max Axxess wrench set but it doesn't have a long handle or a flex head. Nor do I have it with an 8mm allen socket for the special socket type.

I used a breaker bar, deep 10mm socket, and 8mm allen key with an 8mm ratcheting box wrench stuck on it to remove it. I wanted to find the shallow 8mm socket from Stahwhile or Hazet but Samstagsales doesnt seem to have it.

Anyways... good luck with that URO fan clutch. I was going to buy a new fan clutch but I just so happen to have a 606 fan and clutch sitting on my work bench to install for my OM603.

I remember doing the radiator on my Cabriolet and I think removing the fan clutch on the M104 is easier than the diesels, but it's been a while.