I have a persistent rattle that sounds like it's coming from the top of the B pillar, drivers side. I've confirmed this as the location vs the seats/storage compartments in the rear. Also its not the seat belt adjuster because I can hold/tension that and the rattle still happens. Occurrs when going over paving patches/rough areas of pavement... sounds like there is a loose bolt or something hitting metal.

Any ideas? TIA.