Hi, I am working on a project that involves modifications to rear view mirrors and wondered if anyone would be good enough to help out with a few questions:

1) Do the different Audi models share common mirrors? Are there various options (auto-dimming, regular, homelink) or are they all pretty much the same across the cars?

2) Is there any preferred after market mirror folks like to switch to>

3) Do the mirrors use a traditional slide-on wedge type mount such as after market mirrors like the Gentex use?

Thanks for any help you're able to provide.

Chris.