Right after I got my Cayman GTS in '15, I started hearing a suspension noise in the area of the driver's side front. Took it in to have it checked out, and the dealer could not find anything. Took it back in, and they kept it for a while. They did things like take it for a drive with a guy in the frunk trying to hear it. They used chassis ears. Nothing they did could pinpoint it, and I was beginning to think that they thought I was nuts. Finally, I saw an article in one of the car mags that described the same noise on one of their long-term testers, and sure enough after showing the mechanics the article they found my car had the same problem. There was actually a loose suspension piece.