The mirror can be easily attached by suction cup tensible on the rear window. There is even a sticker is provided, which can be placed on the rear window to find the right position for the next time you use quickly. This I do not use, because the mirror is convex curved and therefore a wide angle - a cm-precise alignment is not required undated with me 10 seconds.
The coupling is actually a breeze because you can drive very precisely with demKupplungskopf under the clutch.
Absolutely outstanding part that I can fully recommend!