My driver's door side mirror on my Q70 has been loose the past few days and I was looking through the Service Manual to figure out how to open it and tighten it up. I was having trouble finding it and started doing a search on "loose Infiniti door mirror" and came across a thread for the QX70 where someone else had the same problem. Someone suggested just using the buttons to open and close it a few times to see what happens. I went out and tried it and that tightened it up completely. I thought I would share it so that if anyone else has the problem, try the simple solution first!

Well...that's certainly interesting. Thanks for sharing!