The noise like? --- if you had a CD package in the lower door pocket and it would tip from one side to the other as you turn.

Would that be a little "clunk"?

From all the doors? Strange.

I would say be positive that it is coming from one door and remove a panel. Then go find it. Perhaps somebody put marbles in the doors?

Heck take a BMW person for a ride ask him to listen see what he says.

Test drive another car like your and see if it makes the noises.