So.. I was able to code in sports plus like you mentioned Gregus330i.. its very simple to do. I tested the sport plus option and it doesn't seem to do anything more than what the sport option does. I have a feeling that there is something else we need code in so that it fully works.
I played around with the M display settings while I was there and I managed to code in the M setting, however that doesn't do anything either. As in you can get into the menu option and view the exhaust flap settings, dsc mdm, but when you click to change the function nothing happens.. so I coded it back to normal.
I also took a screen shot of some of the other options available: