There is a small felt covered thing near the top of the inside of the door. What it does is puts pressure on the glass to keep it from rattling, they are adjustable due to the fact that over time they wear down. If you take the door panels off you can tighten them down a bit, just don't get crazy or you'll end up messing up your glass. Should be one in the rear side of the door and one about 2/3's of the way up....give that a try.....good luck!!!!