I'm a car rattle obsessive. My last car, a Mercedes CL500, had a consistent rattle in the two wood trim pieces around the seat controls. No matter what was tried, the rattle kept coming back. So when I started hearing a similar rattle going over bumps in my 1-month old Model S, I went crazy pushing on different parts of the dash trying to find the source. I was just about the call the Service Center when I continued my search in the arm rest area and found the USB Memory Sticks. I pulled them out and the rattle was gone! I'm sorry I ever doubted--I hope I am forgiven. PS: I found different type of stick that eliminates the rattle.