Step 1 - Remove interior door panel (if necessary). (
http://carstereohelp.com/stereoremovalNisMaxFSpk01.htm)
Step 2 - (Begin here) Carefully pry up the plastic cover.
Step 3 - Remove the sail trim panel (triangle shaped piece on inside of door.
Step 4 - Disconnect electrical harness (if applicable)
Step 5 - Remove the mirror attaching screws (there should be 3 of them), then carefully pull the mirror from the door
The installation is self-explanatory. Good luck.