CarolinaMBZ,

There should be 3 rubber dampers between the IP and the stop cable connector. Yours are probably broken. They are about 3/8" long and made of moulded rubber if I remember correctly with threaded screws sticking out each end

You can buy new dampers at a MB dealer or you can replace with screws using nuts to space the 2 flanges apart.

I have some black head rests if you need them.

P E H