The seals around the Glass panel have a life of around 5 years, if they are worn, water can get between the Glass & Frame and the result is Rust. This can weaken the bond between the Glass & Frame. If you have wind noise that is getting worse you should have your Sunroof Checked, the Glass Panel can become loose & fly off. We can replace seals & Glass Panels on Webasto-Hollandia Sunroofs Free of charge up to 10 Years old. Whether Fitted by us or not. Please Call with your Vehicle Details & serial Number of your Sunroof this can be found below the Wind deflector on the frame front edge.