Outside Mirror Glass Disassembly Note

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Press area A of the glass so that area B moves outward.
Insert a screwdriver into the notch and remove the glass from the mirror base.

Fig 1: Remove Glass From Mirror Base
Courtesy of MAZDA MOTORS CORP.