Hey Fellas
Here is another contribution to our great community:
Issue: Rear View Mirror wobble/shakes all the time or pops ajar when using the high-beam divertor lever. I lived with this issue since I had her, but no more!
Tools: 90 degree angle Pin Tool & some weather adhesive/sealant.
REMOVAL:
1. Take the pin tool and place it in the center right and then center left at the mirror to window bracket underneath the miror mount, you may need two pin tools if one will not release the pressure tab/s. ( luckily, mine was so loose, it only took one side )
2. Firmly but carefully slide mirror mount upward, wiggle a little side to side and you should see/feel it slide up. Just becarefull not to knock the bracket off the mirror by putting too much pressure, use common sense. :-P
INSPECT & Service as needed:
3. Inspect the mirror mount for severe wear or damamge. ( The looseness can be one or two things, but probably not the actual mount )
4. Inspect the High-Beam divertor lever, if loose or not working, it just takes a simple small screw driver to pop it back in place. If yours was worn out like mine then you may need to consider using some weather-strip sealant/glue. I used the 3M stuff because is stays pliable so I can still use the lever, if needed. I have black tinted rear windows so I never need it.

GOOD

BAD = Popped Out
5. Inspect the window mounting bracket, mine was a bit rounded open so the mirror mount was just wobbling around in it. As you can see, there are two indented tabs that lock the mirror mount in place while trying to maintain pressure to keep it snug.
I used a BFS and gently pushed in the top and bottom bars about a 1MM +/- for extra support and the also pushed in the two tabs just in case. ( Pic 3 shows how much I pushed in the bars )
DO NOT OVER DO IT ON PUSHING IN THE BRACKET's top and bottom bars or you will not be able to slide the mirror back on.
INSTALL:
7. If you did not over do the pushing in of the top/botom bars of the bracket, the mirror should slide on snug and fit tight when it is locked in. You should not be able to see any part of the bracket from your normal seated position. Check outside to insure it has seated properly.
VOILA! That is it!
I guess you can use the same technique to replace a worn out mirror assembly