I knocked the rear-view mirror of my 2007 BMW 650i (E63) and it came detached. I can't figure out how to get it back on.
See pics below:
I found the answer on this site: https://www.justanswer.com/bmw/74e1q-reattach-328-rear-view-mirror-metal-hexagonal.html
Using this schematic: http://ww2.justanswer.com/uploads/EU/eurotec/2012-09-10_023848_mirror.pdf
I had to remove the two-part cover, then place over hex bolt at 60º off-center and rotate into place, then re-attach the cover.
I have no idea how it came off so easily in the first place.