Dealer fixed 99% of the rattles from the sub, wastegate, passenger door speaker. I may fix this next one on my own. My '12 GLI Autobahn now has developed a slight rattle when going over bumps and it seems to be coming from the drivers door. When I put my arm on the door armrest and push the rattle goes away. Almost sounds like the window is loos but I know it's now. Could be the bar inside the door for the locking mechanism. I'm gonna pull the door panel and play around a bit.