+2 use only flatbed. BMW manual states that as well.

As for the red tool, this video shows how to do it. https://www.youtube.com/watch?v=3viS4EcaW3o

I don't have the red tool on my 2012 so it may have changed how to release the brake for the 2012 models. If you don't have that tool, I think this video shows you how to do it from underneath the car
https://www.youtube.com/watch?v=RXIH-F-F_fo