ok so I have had this rattle in the car after 7 months of driving it. The rattle only occurs when im in drive. In park there is no rattling. I couldn't figure out what wasa going on until one of my co-workers walked by and heard the rattle from the outside of the car. The rattling was coming from the liscense plate holder(not the frame) in the front. To test this i had my co-worker hold onto the plate holder and the rattle went away while in drive. I am thinking about taking out the holder and finding some other way to mount the plate or sticking some padded double sided tape behind the holder.

On a side note, I am noticing a slight spring noise when im driving(no bumps). It sounds like its coming from the driver side seat but I can't figure out which part of the seat is causing this problem. To make things a little more clear, it sounds like a person jumping on a bed with bad springs. I read somewhere on this forum that some guy took his to the dealership and they put wd-40 on his seat.....