XLT driver door
+1 I can't understand why Ford did not line the door pockets with some type of sound deadener. You can't pu a few pens in the door pocket w/o hearing them rattle. Hopefully you do wear your seatbelt. If not, it could be the belt rattling against the B pillar.
I had a door rattle and I had the door pannel off to check out a window regulator problem so I looked around for the source of the noise. I figured it must be coming from the door lock hitting the metal door frame so I put 3 layers of duct tape in between and put the door back together. Didn't fix the window but that damn annoying rattle is gone!

