I will take the car to my independent shop. I take issue with those who say if the dealer can’t replicate the problem there is nothing more they can do. YouTube is replete with videos where mechanics check cars with problems that can’t be duplicated and, using analyzers, and expertise, figure out what could cause the problem, find and fix it. Back when I had a BMW, it had an intermittent high-speed “stutter” that two BMW dealers “couldn’t duplicate,” and didn’t repair. I found a two-man shop specializing in German cars. They also couldn’t duplicate the problem. But they fixed it. It’s like saying you went to a dr feeling ill and with fever, but your fever was normal at the dr’s office, so he said there’s nothing he can do, and sends you home.