I too have been on the rattle source quest.......
For the one at the back I took the spoiler off, taped up the in line connector for the stop light and cracked the light flange putting it all back, obviously the rattle continued...
I have since taken the trim off the tailgate and I reckon it is the tie rod between the boot latch and the release button, I greased the button end to no avail so accessing the lock is next on the list........(unless it is the tailgate springs, hmmmmm....)
Rattle near the front roof pillars, took it to the dealer, got it back, no difference, took pillar trim off and took alarm sensor and wiring off, no difference, put foam tape on all the pillar trim fixing clips, no difference, turns out there is something loose in the drivers side sun visor!
just two more rattles to look at now.....
is it worth setting up a rattle info page with locations and possible causes?