[MARKVIII]

ok so i have a '05 v8 1sg STS. the dam thing rattles away on the front passenger side of the car when i drive over rough/uneven roads. could be the passenger door, glove compartment, seat, seatbelt area. I DON'T KNOW. sometimes it sounds like it is coming from the instrument panel on the passenger side. anyway, brought it to the dealer 3 times. each time they say they fixed it. each time they didn't. Rattles are my #1 pet peeve. I know in the big scheme of life they are trivial but it is annoying. Just got it back last week after being at the dealer for 4 days and after they CLAIM they fixed it. well guess what .. they didn't. they told me there was something loose in the rear passenger door panel. My question is..should i just live with it? should i brng it back? should i swallow sticknine tablet's??