very simple, I just replaced my driver's side(left here in US) mirror with an atmospheric one that has a blind spot eliminator.
I simply turned off the car gently wedged my fingers between the glass and the housing and gave it a yank. Don't pull too hard because there are two wires that connect to the back of mirror. The mirror will seperate and then unlug the wires.
I unplugged one wire and plugged it into the new mirror and then did the second wire so I wouldn't get them backwards. Once both are plugged in just push the new mirror into place. No tools required.
I might wear gloves if there is broken glass.
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