Center bearing support of the driveshaft is completely shot. I'm certain. Parts are on the way. In the meantime, it does its thumping as would be expected. The odd thing is, that it only thumps upon accelleration/decelleration (that's not odd) but only when cold. After a mile or two, it goes away, and you'd never know the support was gone.

Question: Could the cold-only phenomenon indicate that something else is also a worn out?

__________________
Paul
2004 E500 4matic; 72,000mi