So everything bolted up fine and the refurbished shaft has definitely eliminated MOST of the vibration under acceleration but not ALL....

SO what else could cause this? Rear shocks are new as well.

Edit: come to think of it I had to tighten the 2 gland nuts with the car on jack stands. Perhaps having them loosened and retorqued on a rack where car is on it's wheels can help.

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190D SOLD
2.5 non turbo
5 speed manual transmission
Build date: December 1985
W211 E320 CDI
W126 350SDL
X204 GLK 250 Sans Bluetec