My new coupe was like that when I got it in March, sounded as if the doors were going to fall off, especially when the sun was shining. I used a piece of the chalk from a cycle puncture repair kit and rubbed it on all the door seals after I had given the car a good wash including around the doors and door frames. It wasn't an instant remedy as the noise came back a couple of times but it's OK now. Good luck with it