I've heard the rear door can be adjusted. Qustion your dealer about this.
Concerning the dash rattle . . . do you think it's possible something might have fallen in the vent? Maybe you can access the area from under the dash . . . the problem here is . . . once you start tearing things apart to get at the source . . . you end up creating more rattles :-(
Sorry . . . the only other suggestion I have for the dash rattle is . . . turn UP the stereo ;-)