I have had some terribly annoying squeaks in my car since it was new. Tried to replicate them for my service center advisor but never could. The sounds were like styrofoam cups or even a better description would be the sound a turkey call makes. I was able to make a video of one of the culprits in my garage while doing some detailing. I played the video for my service advisor and he was convinced the sound was from the rubber seals. He recommended I get something called Gummi Pflege Stift (available on Amazon) and try it. I ordered it and used it on every exposed rubber seal and rubber gasket I could find. Amazingly it WORKED!!! If you are plagued by this it might be the best $14 you'll spend. Video of of my "Squeak"