I hear a rattle or squeak when going at low speed over a slightly bumpy surface. I can't hear it at highway speed or when in a noisy environment. I removed everything from the back of the car, including the carpeting, back seat headrests, jack, spare tire and supporting styrofoam. The noise persists and I believe it's coming from the inside of the back door itself. I removed the plastic access panels and found nothing loose. Any suggestions would be greatly appreciated.