Have a 2013 Cooper Coupe S with 120k. It has ran perfect up until yesterday I was going around 95 mph then tried to accelerate to go around a car and noticed the car cutting out a bit. Didn't think much of if but noticed this morning it was doing the same thing at a much lower speed when I tried to accelerate. I was thinking bad fuel but then filled up with new fuel which I always use premium of course but still same thing? Anyone have any ideas? Maybe fuel pump, filter etc etc???