Another concern for me is the tyre width, as I'm getting 225/45R17. I guess 205 should be more than enough width for the small engine 1.6L and better under wet or snow. How is your experience with them and interaction with the controls.
Here some interesting links to summarize.
http://www.1erforum.de/bmw-m135i-m23...me-197601.html
Lots of info in this german forum, that table contains all detail.
CBC
http://www.bmw.com/com/en/insights/t...e_control.html
EcoPRO OR Confort OR Sport (DSC enabled)
DSC
http://www.bmw.com/com/en/insights/t...y_control.html
Sport+ OR Traction (DSC disabled, DTC enabled)
DTC
http://www.bmw.com/com/en/insights/t...n_control.html
DSC Off (DSC,DTC disabled, ADB only, Comfort throttle mapping only
http://f20.1addicts.com/forums/showp...4&postcount=38)
ADB
http://www.bmw.com/com/en/insights/t...erential_brake