Quote:
Originally Posted by bofa
I still hate the little triangle glass above the mirror... don't see why the window is not 1 piece of glass.
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When the mirror is door mounted, the mirror mounting would block a window from going down, so they have to have a little triangle thing to keep that section of the window stationary.
As for why door-mounted vs on the pillar, it's for a couple reasons. First is ideal mirror placement. As you make the windshield more raked, the a-pillar is pushed further up front. If you have the mirror on the a-pillar, it can be positioned too far forward, which is bad for ergonomics/visibility.
On the visibility note, when having it on the a-pillar, you'd have a big black triangle in place of the triangle glass. Door mounted mirrors tend to be better aerodynamically.