Start by removing the bezel,you can use a flat blade screw driver to pry off ht cover.

Then lift it, is not neccesary to remove the door trim panel.

On the left side mirror, the adjustment knob is held by a Torx 10 screw, just release it a bit, now you can completely remove the bezel.

Now remove the mirror mounting nuts, (5/16") and the mirror. Done!
