I got rid of my door rattles by putting felt tape around the door panel edges. You have to pull the panels off, not all the way, just take out the screws and pop the snaps out, a door panel tool is useful. It's just a flat piece of metal with a slot in it that you put around the snap rivet. I used 1/8th inch tape around the sides and bottom. I just asked the dealer for the tape so I could do it myself and he gave me their rattle kit and said take what you want....He knows how much of a headache I've had and that they are partly responsible for a lot of it so he's been good to me lately.
I orignally was going to dynamat the door but decided it wasn't worth pulling the plastic membrane off....basically I got lazy and figured if the felt didn't work I'd come back and do it.