I have a 2015 RT SM6 with 2000 miles. An annoying rattle has developed. It happens when the right wheel is jarred while riding. It has the sound of plastic not metal. The sound seems to originate from the right mirror or speaker area. I removed the mirror and shook it. Nothing rattling inside. Has anyone encountered this phenomenon? Maybe I need to remove my guardian bell and give it a good wax job. Thanx in advance.