Remove the mirror and use a heat gun to remove the button. Caution: There is always the possibility that the windshield will crack.
Vehicles use a plane mirror for the central rearview mirror to provide an accurate reflection of objects behind the vehicle. A convex mirror is used as the side mirror to provide a wider field of view and reduce blind spots. This combination helps the driver have a clear view of the surroundings and enhances safety while driving.
Remove the clear lenses from the overhead lights near rearview mirror. Use a torx driver to remove two small screws holding bezel in place. Remove bezel. Now you can access the the two torx screws holding mirror.
An auto epoxy called Speedgrip is best for this. If you can't get it then use J B Weld.
For a wider field of view in the reflection. In the middle of the mirror, the mirror is facing directly towards you. But nearer the edges it is tilted to the side or above and so you can see things that you would have to turn or tilt an ordinary flat mirror to see.
I recently had to repair the rearview mirror on an '02 Nissan Xterra. It may be different, but perhaps it used the same technique. The mirror is connected to a metal "button" which is glued onto the windshield. In my case the glue had come undone and I had to remove the button from the mirror in order to re-affix it to the window. You can probably get the rearview off the button while still on the windshield in the same way. From the bottom of the housing there's a small notch where you can see the button and a small tab of spring steel. Use a hack saw blade or something else flat and long and slide it in between the tab and the button. Push it in around .75" until you bump up against another spring tab. Continue to push against it and it will release the lock. While pushing on it pull the mirror upwards off the button.
At the back of the mirror you will find a rubber stopper. The stopper is same color as the mirror. Remove that stopper and it will reveal a screw. Tighten the screw to adjust. Be careful not to remove the screw. If you do you will have to open up the mirror to catch it back. Also, depending on how flexible you are and the length of your screwdriver, you may need to remove the mirror. Use a screwdriver to pry out the plastic cover and and you will see all three screws holding the mirror to the roof.
If you can see the car being passed in your rearview mirror.
I would use JB WELD. $3.99 Available most anywhere. It will do a good job for you. Mark
You have to remove mirror by inserting a 1/8th inch screwdriver in notch and lift up while wiggling mirror. This is contrary to the old ways we use to remove them; by using a simpiler Allen wrench adjusting. The new mirrors make it much easier to knock/break off. Once Mirror is removed then you simply use same the screw driver and push plastic latch off the mirror which supplies 12 volts dc to lights.
Sure - use one of those TV rear view mirror toys and do a right-left image reversal, (but prepare for lots of accidents until you learn to use a non reversing mirror. (Assuming you went to the trouble to learn how to read a normal one ... AND THAT WAS a learned skill you know.
There is a small hole on the underneath side of the rearview mirror. You have to use a paperclip to push the reset button inside and turn the vehicle in slow, short circles until it resets.