all you need for this is a couple straight screwdrivers a small torx driver and a light. and possibly some needle nose pliers.
1.) Take mirrors off car.
2.) turn mirror so you can get in behind the glass by the inside (the part that bolts to car) there is a metal clip (red arrow) unclip it and pull it out of a few of the holes. than it just prys off with light pressure.
3.)after that's out there are 4 screws on drivers side and 3 on the passenger side (yours may be different??) the screws are circled in red)
3 in the housing
1 on the side hiding behind the foam (drivers side only on my car)
this took me half an hour (probally would have been like 10 but I took a good long look at it first
)that's it your mirror should be in pieces. (hopefully not the glass!)
I woudn't reccomend doing this to your only mirrors. these are off my parts car. so if they break I don't have to run out and buy new ones.