855D won't shift while engine running

My 855d won't shift while engine is running. Had dealer check it when it was still in warranty, told me it was rust on the clutch from not driving it enough...

less than 50 miles on the unit.

I have read where the 825i people use the diesel clutch to fix theirs. So what do I do with the diesel?

Irritated me enough to try to trade it in, but to far upside down.:rolleyes:

Any suggestions?