The manual isn't always or even often "user friendly", especially the Index. So ask away. Don't worry about asking me anything. And yes, the mirror select button is your issue. It happened to me early in the learning curve. A lot of things did.
Here's one for you: you pull up to an object as you are parking and you're sure that the parking sensors should have beeped by now, but they don't, and never do. So you park "old school" style unassisted (which in this car with its long sloping hood can be very stressful!). You wonder what happened to your parking assistant? Then you find out that "P" is turned off (it's right below the cup holders in the center console). It's supposed to turn back on automatically when it shuts off automatically once you get above 11.somethingorother mph. Mine shut off and never came back on. I read in the manual (the manual has turned into my bedtime read) about this and turned "P" back on and voila! my parking assistant is back. But now "she" won't leave me as described. "P" has never, ever since turned off and remains on continuously. I'm not complaining. Why "P" is supposed to turn off at all is a mystery to me. What's the point of having it turn itself off?