i have the EXACT same problem, i almost sold my car one day because of weired random noise's. My hatch rattles alittle bit every once in a while, when i turn my system up.. the driver door rattles when the bass hits.. a lot more then it should. The passenger door rattles sometimes.. i guess when it wants to. I have notice this since day 1 when i first baught the thing. I get random noise's at random times. I find myself making excuses for why my car makes so much noise to who ever is in it at the time, its stupid when a girl is like.... "nice car" gets in it and its making all these random a$$ noise's. I hate it... its all good though, i dont even care anymore. oh yea.. i also get a nasty squeek from my seat belt thing.. i think both front seats. The windows also rattle when down alittle bit. Bottom line for me.. get use to it, turn up the music..