I just got the transmission failure alert this afternoon after coming out of home depot. Car was in "P" and could not change gear. I have a 2011 E92 M3 DCT built date june 2010. About 15k miles. Never had a problem before.
Restarted my car multiple times with no luck. Opened the hood and waited for about 15 min and started up again w/ the alert gone.
Taking to dealership tomorrow to check.
Ironically when all this was happening some random guy at the home depot lot was telling me how nice my car is while I had the WTF face trying to figure out what the hell was wrong w/ the car.