I'm in process of doing a write up on BOTH of these potential problem spots for the folding mirrors with a LOT of pics as I just tackled both of these jobs a few days ago. my limit switches have the metal clips on the black boxes but that is NOT solving the problem. I've cleaned everything you can see and even not see (as I've taken even the motors that fold the mirrors in/out and replaced with newer ones) and I believe the problem to lie with the white ring on top of the folding motor housing. the groves where the limit switch seem to need modifying. I slightly did to one and it made my problem less noticeable, but still did not solve perfectly. I have also documented the removal of the limit switch with nice pics. I'm going to attempt to fix my mirrors again.
As for the reverse dip feature, its an easy solution and is 100% not related to the folding mirrors problem. you just need to follow the DIY found on this forum (do a search for reverse dip feature fix) for cleaning the small square shaped mother boards for both rotational axis's. but be aware that its difficult to take the mirror backing plate off the ball socket without breaking the ball socket or axis arms. be gentle and make SURE the plastic is warm!!!!!
both jobs are easy.
removal of the plstic mirror exterior is best by starting at the bottom, and pulling lip of plastic towards the front of vehicle.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S