Volvo 740 how do you change a driver side mirror?

I have done this! You can change just the mirror glass or whole assembley easily.For glass, look under the mirror, you'll see a oblong hole.Reach up inside with a small, flat blade screw driver,You will feel some "teeth".Get the blade in between the teeth and slide it either right or lefy.This unlocks the glass.It will pull striaght out of mirror shell if its all line up.A suction cup stuck to the glass may help. for the entire assembly.You have to pop off a triangular trim piece on the doors interior.That exposes the adjustments rubber boot.This pulls straight off.Then you can see a retaining clip that slides out from under the adjusters cable.Pull it out of the way.Now you have three small bolts that are holding the mirrors base to the door.As you un-bolt, have a helper hold the mirror to keep from dropping it.Install is just the reverse.Easy!