I had a very similiar sounding problem with my car, and thought it was something to do with my shocks as well.
Took it in to Rocco at RMP, and he diagnosed it quickly as simply a loose parking brake, so he tightened everything up, and no more clunking/rattling
- 2013 328i xDrive
- 2012 135i *retired*
- 2012 128i *retired
- 1998 318is