Tried the bolt extractor today, no dice, just rounded some more. I haven't tried a nut splitter, but could see that being tough to fit in there.

I'm sort of at a decision point:
- I've heated the nut enough that the exterior rubber on both side has split, which can't be good for the link. That said, it doesn't twist by hand, so can't be that bad?

- I could try to get a reciprocating saw in there, but that's truly a point of no return. Presuming I can saw through the bushing, what are the odds that I'll be able to break both the nut and the head out of the mount bracket?

I figure the torque required scales with the length of the bolt (i.e. the whole inside of the bolt is fused to the bushing sleeve), so cutting will dramatically reduce torque required. However, it will still be fused on the lower face of the nut to the wall.

There is really no room to get even a 90deg drill in there, so if I saw out, I could be left with dropping the subframe.

Right now, I'm tempted just to leave this link in there as is.

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W201 1989 190D