You have to remove the inner door trim panel first. It is held on with push in trim pins. There are also two screws in the door pull that have to come out. Then there is a push in plastic screw near the door handle. Remove it and gently pull out on the door handle trim surround. The locking lever just snaps in place but it's tenacious. Once you have it free remove the trim panel by pulling out on the trim pins. They are behind the panel and you can use a flat putty knife to pull next to them. Once the panel is free you can remove the power window/lock switches by pushing them back towards the door pillar and lifting in the front. Then disconnect the wire.
Make SURE the window is UP before disconnecting it.
Now you will find a plastic vapor/water barrier glued to the inner door panel. GENTLY remove the top of that panel. If you look you will see the three holes that you go through to get to the mirror retainer nuts. You will also find the mirror control wiring right there and can disconnect it. Remove the two bottom nuts first. Then the top one so you can grab the mirror head.
Reverse the procedure to put the new one on. Make sure the foam seal goes back on the new one, and if the plastic isn't sticking real well, you can use trim cement or window sealant to hold it. Then put the trim on and the switches.
BE VERY careful when you tighten the new mirror nuts down, they are easy to break from the inside.