Rearview Mirror Removal

Insert a flathead screwdriver between the rearview mirror and mirror base.
Insert a tape-wrapped flathead screwdriver to the position shown in illustration and press the center part of the spring.

Fig 1: Inserting Tape-Wrapped Flathead Screwdriver Between Rearview Mirror And Mirror Base
Courtesy of MAZDA MOTORS CORP.
Pull out the rearview mirror toward the vehicle rear.