You must get the engine rpm closer to the tranny rpm when shifing. MB
diesels are notorious for bouncing neophyte drivers faces off the
steering wheel!
Slower clutch engagement or a bit more right foot will take care of the
problem.
I would, however, check (or just replace) the tranny mount and inspect
the diff mount and the center carrier -- hard shifting will cause
excessive wear on those parts. Probably not a bad idea to check the
engine mounts as well -- if not replaced, probably flat by now.
Peter
