The carpet mats on my 328 slide forward all the time and sometimes interfere with the gas pedal. I bought these things called Eagle Klaw. You are supposed to drill a hole through the carpet and at the bottom is a spike which prevents the carpet from moving. I'm against using carpet tape because eventually you want to pull the carpets up to vacuum and there will be residual glue. Before I go down this path I am wondering if anyone else has any solutions? The only thread I see on this subject is about ten years old filled with broken links.