I have a 1996 C280 Sport. I noticed the rear view auto dim mirror making rattling noises last week, and upon further inspection this weekend, found that the mirror glass flips forward and backward whenever the car accelerates or decelerates. The mirror glass appears to be loose in the mirror housing. Is this a simple problem that can be easily fixed at home? Can the mirror be "tightened" in any way? Any insight would be appreciated, as I believe that the dealer might want to replace the entire mirror, which will be very costly.