[moltuae]

Originally Posted by HPsauce

Can anyone explain this and point to a fix?

I rarely use the auto-dipping nearside mirror function, but today noticed it wasn't working properly. This was first seen while the garage were using the spare key which isn't programmed to any memory button. But it's the same on the normal key.

On selecting reverse it dips, but doesn't return to normal. Reverse again it dips further, and so on.
The normal adjustments all work, up down left and right. So I can just put it back.

Any thoughts?

Mine occasionally does this, or 'forgets' to move back up.

I get the impression it calculates the mirror's position through a simple timing procedure, rather than some sort of feedback arrangement, since it doesn't seem to be aware of the absolute angle of the mirror.

At least that's the way it seems because I find that I can 'resynchronise' things by moving the mirror back up then, using the memory seats button, store the new mirror position by over-writing the appropriate memory. After doing that, it usually works perfectly again for a while. I haven't confirmed the cause, if any, but I suspect it could be getting nudged at the drive-through car wash.