Mazda CX-9 Grand Touring 2009 Manual page 2434

1. Insert a flathead screwdriver between the mirror and the base.
2. Insert the flathead screwdriver to the position shown in the figure and press the center part of the spring.
3. Remove the rearview mirror in the direction of the arrow.
CAUTION:
REARVIEW MIRROR INSTALLATION [VEHICLES WITH AUTO LIGHT/WIPER
SYSTEM]
1. Install the rearview mirror onto the base.
2. Install the rain sensor.(See RAIN SENSOR REMOVAL/INSTALLATION .)
2008 Mazda CX-9 Grand Touring
2008 BODY & ACCESSORIES Glass/Windows/Mirrors - Mazda CX-9
When removing the rearview mirror, the mirror may hit the top
sealing, possibly damaging it. Therefore, hold the mirror body
securely by hand when removing the rear view mirror so that
the mirror does not contact it.
Fig. 84: Inserting Flathead Screwdriver Between Mirror & Base
Courtesy of MAZDA MOTORS CORP.