I have a 2009 E350 passenger van with the two opening side doors, (not the sliding door).
Over the last few months the doors have developed a rattle, especially when on a bumpy road. The doors seem to fit good and I have made sure that the weather trim is sealed well. I believe the door that is not fitting well is the left one (looking at the two doors from the outside).

There is a latch mounted to the body where the door closes. It looks like there is a way to loosen that latch and move it in about 1/8 of an inch, thereby sealing the door better. Has anyone ever tried this?
Thanks.