Hey, no need for that... I was all ready to take my 2 week old back to the dealer and pitch a b* about the rear glass rattle....then I tightened mt tag frame and fixed it.....
That is one of the best things about sites like this....

 

glad to know im not the only one. i also have that trunk rattle and was thinking the worst, but now i think i will pay a visit to my license plate frame and straighten it out along with the plate(they both sit crooked anyway.) i was about to slap a massive amount of deadener back there thinking it was just bad body rattle.

 

Mine sounded just like a glass rattle.. I hope yours is just as simple to fix...