This vehicle has two instances of transmission disengagement. One at highway speed and the other while driving in a residential area. In both cases the vehicle suddenly started to slow down, and the rpms went up to 4-5 thousand. I was able to stop the car and turn it off and after a few minutes restarted the car and completed the journeys without any further issues. I have contacted the dealer and will be taking the car in for a diagnosis. I did not notice any warning lamps or other symptoms before each occurance.