The first part of the question is the easy part . This picture shows a manual transmission but the automic will be the same .
BMW Technician
12 YEAR MASTER TECH
The mirrors are not loose. They appear to be normal. Both mirrors are not working properly when I use the mirror control. For instance if I direct them down they will just keep going all the way down and not stop. The same with up, in, or out. However, the passenger side does operate properly and face down when backing up, then it comes back to the previous position it was in. It just seems to be a problem to get them to stop in the right position.
With out having the vehicle and a BMW tester the mirror issue could be a bit tough to diagnose . I would have to say that the mirror motors are probably not the problem . It could be as simple as a faulty switch , very easy to replace you could do your self . You may also have a problem with the control unit , the control unit will need to be replaced and programed by the dealer . I would recommend replacing the switch , if the switch does not repair the problem I would take it into the dealer .
Thanks and I hope this helped .