Not dead....got the same problem with passenger side front window on my 2018 300.
2 1/2 years old and 42,000 miles....out of warranty. I’m going to the dealership anyway and start the battle I guess. Will let you know what happens. This should not be. I had a 2014 300 and no problems. I like the car, but this is not right. From what I see it is very common problem. I’ll keep you posted.