The rear window on my genesis will sometimes open during a heavy storm or driving through a car wash. The dealership has no clue. This first time it happened we drove directly to our local dealer and they did nothing. I emailed Hyundai and they would not provide me with a solution. They said I had to take it to a dealership. When I told them I had they suggested I go to another dealership. Unfortunately it is 200 miles round trip to one. Our mechanic has contacted other dealerships and they do not have an answer. Has anybody had this problem and can tell me what the causes this and how to repair it.