No fix yet for the door portion. For the seatbelt height adjuster I simply moved it from one position to a higher one and it fixed itself. I'm wondering what it will take to fix the door rattle. Dynamat may come in to play.

 

hmm...ill have to just get some time and look into mine...
mine's an 04 so the seat belt adjuster is different..i dont remember if it has a button....(it should...i prolly just dont remember..lol)

 

I had a rattle that I thought was the B Pillar and it ended up being a loose screw on the left passenger door on the inside causing the plastic panel to rattle. The door panel is mostly panels held together with screws on the inside. Took it apart and tightened the screw. Now I do have a rattle on the passenger side B Pillar. These cars are cheap built when it comes to the interior.