So this has only happened twice, once with the 2015 Q3 loaner and once in my 2016. When the car was in Drive and I stopped for a light (with my foot firmly on the break) I felt this rhythmic "jerking" like the car either wanted to accelerate or was about to self-combust! At first, i thought is was the bass as I had my music on pretty loudly =). But when I turned the stereo off, it continued to jerk. Both cars had minimal mileage (< 400 miles) at the time. Has this happened to anyone else? Is it something I need to have checked out? Thanks in advance!