Each seat has a little flat rectangular piece that fits between rail and
seat base, and apparently is the actually sliding surface for the seat
adjustment. It is steel with a plastic insert. That plastic deteriorates
and becomes loose in the steel part.
Follow the link someone else posted for the www.waycool etc site.
It has detailed instructions with pictures.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.