Originally, the carpet was shipped with, but not installed in, the car, and the carpet was installed by the dealer. The carpet was screwed down at four points and then nailed to the floor. That's how my 55 carpet was installed (the nails are still in the floor). In other words, the dealer installed the carpet after the seat was installed at the factory. On the other hand, you could remove the seat, glue down the carpet, and reinstall the seat, which might help to hold the carpet in place. However, if you glue the carpet, it will make accessing the wiring underneath it for repairs difficult.