Well the Service manuals showed up and I know you all have a buring desire to know the answer to this question so hear goes:
>>Stick a 'flat prying device' (a.k.a. screwdriver) behind the mirror glass and twist it to free the mirror mount from power rotation cup clip.<<
This interpretation from the exact text wording has been generalized a little here to spare you all from the technical details. But in a nutshell, the basic idea I guess is to force it off using a screwdriver. Go figure!
Of course, they also preface the procedure with "saftey precautions" such as to be sure to "use gloves to protect yourself from either already broken glass or possible broken glass" ...I like that thought - NOT!
Haven't tried it yet--maybe I better order a new piece of mirror just in case this procedure yields a more broken component than when I started?
Any takers? I've got $10 bucks riding on it that when I try this, the mirror breaks -- no matter how delicate I try.