There's a small and slightly blurry image I have bookmarked at
https://f30.bimmerpost.com/forums/at...1&d=1427641065 that explains the modes and gearing for the previous gen, I would assume that the G20 would be broadly similar
Edit: found a better image after some reverse image searching:
https://f30.bimmerpost.com/forums/sh...postcount=68):