Does anyone know how to tighten the passenger mirror of an E46 M3? Several times while the car was under warranty, I had this problem and the dealer fixed it without comment each time. The housing seems to be loose. I can see it vibrating as I cruise down the road. It's really annoying, since everything is blurry. Now I'm at a new dealer, the car is out of warranty and they tell me there is no way to adjust the mirror. They tell me I have to replace the entire unit for a cost of several hundred dollars. I'm dubious as to their assertion that it can't be adjusted or otherwise tightened. Can anyone help?