There are two reasons the mirror is rattling. First is the mount to the windshield. To fix this I wrapped an elastic band under the mount on the windshield, twisted the elastic band once returned the opposite direction over the mirror and under the mount. I still had enough length of the elastic left so a third wrap was needed. The wraps are not visible and that issue was resolved. The second rattle is the female connector rattles to the mirror case. I unplugged the wire harness, and rotated the mirror so I could see the port. Than I mixed a small amount of fast setting JB Weld. I used a toothpick and applied a small amount around the perimeter of the female plug. After it set I reinstalled the wire harness adjusted the mirror and happy to say rattle free!