I've taken my Model S into two different service centers (including Fremont) to get, among other items, two nagging rattles taken care of, but in both cases, despite assurances that both were fixed, they completely eluded the staff. The first is a squeak coming from the right side dashboard on or near the vents. So far, they've added various squeak reducing elements to the area as well as replaced both right side vent mechanisms, but clearly neither of those measures have worked, as I still notice the same rattling on anything less than perfectly smooth roads. The second one is emanating from somewhere in the rear hatch. It sounds almost as if the glass or another surface is clicking against another surface on rough patches particularly when the car is cold. Again, all kinds of foam has been added, the interior plastic trim pieces have been removed, clips replaced, the license plate has been re-attached securely and rubber stoppers adjusted, all to no avail. At this point, I'm wondering how I might go about troubleshooting these things myself, as I'm really not confident the service centers can actually resolve them. I'm hoping someone out there who's had similar nagging rattles or squeaks has some ideas that might lead to getting these fixed once and for all.