Hello folks. New to the forum, just purchased an 07 GTI with some insurance money a gentleman decided to give me by plowing into my car. I love it, great little hatch. However, since the moment I picked it up I have this strange rattle coming from the passenger side front, it sounds like its in the AC box or underneath the car directly under the passenger floorboard. This noise is ONLY at idle and only once the car warms up a little. Any ideas?

Its not REALLY loud but enogh to be annoying when sitting at stop lights, especially when ive only had the car 2 days and off the lot it makes that noise.