It vibrates hardly and losses power when accelerating on highway. The same issue has occurred for few times. It's scary to drive this Lincoln MKS on road. I brought the car to the dealership, and I was told the problem comes from the transmission. The torque converter shudders. The cost of the new part and labor is around $5000. How unfortunate.. I love Lincoln, which is a luxurious and cool brand, but in my case, it's better to trade-in rather than repair.