This morning, I pulled out of the garage, drove about 1 mile, and received a Drivetrain Malfunction warning on my 2013 328i M Sport 8 Speed Auto with 3,500 miles. It went into what felt like limp mode. So, I changed direction and went straight to the dealer (about 4 miles away). While on the way there, I transmitted my problem to BMW via the iDrive system. I did not encounter any problems getting there (except slow throttle of limp mode). I am waiting to hear back from them. No loaners for me so they took me back home to my other car.
I'll let you guys know what I hear about mine.