Couple of w124 subframe questions.
 

I recently removed the subframe from one of my 300e parts car so that i can rebuild it, then slap it on to my DD.

Im having a bit of trouble with the xzn drivers on the outer driveshafts. They seem to be on there very tight. Is there any trick to avoid stripping those bolts? I felt like when I cranked on it, the driver started to slip.

Has anyone used an impact driver on these?

I recenlty took apart a subframe from a W124 donor car. I found that the only way to get the XZN bolts off was to first soak the head in PB Blaster or spray on wheel cleaner and then to use a small screwdriver with a rag to get all the crud out of the bolt head recess. Otherwise, the XZN tool would not go in far enough to sit properly and the slipping would happen. On a couple, I even tapped the tool in a bit with a small hammer or a ratchet. But they all came out intact with patience.

Kroil is a really great thing to use(if you ever get some, order offline)

But the only thing to really do is what remotemark said. If you want to get a little bit of heat involved. It might help.

They seem to be coming off little by little. Im cleaning out the threads, tapping the 10mm xzn bit in, then giving it a bit with the impact driver to "shake them up a bit. After that, the breaker bar seems to be pulling them off.

thanks for your help.