My '00 M5 raer view mirror has its reflective mirror surface flawed with a liquid like gel in the middle of it. I assume that it is the auto-dimming function that has broken. Does anyone know if I can fix it or do I have to replaNEW ONE IS $500...HOPING FOR A CHEAPER ALTERNATIVE...HOW DOES IT COME OFF THE WINDSHIELD? Thanks for your help!! Bruce '00 M5 '88 M5 '72 2002 ti