My M235i is a 2015 - manual transmission.
Build date 8 / 2014.
Same problem as everyone - when I try to turn DSC full off, it takes me out of sport mode (same thing in sport+) and sends me back to comfort mode - making it nearly impossible to drift.
I read the entire thread and still don't have clear answers to 2 things:
1) what is the best mode to drift in?
2) can my 2015 car (Manual Transmission) get an update to let it shut DSC fully off AND stay in Sport+ at the same time??
I also watched the Chris Harris video and read this thread:
http://www.2addicts.com/forums/showthread.php?t=1017054 but he was using a euro spec car with the LSD (which I don't have).