I searched the varius forums and didn't find this problem, at least using the search parameters I entered.

The left-rear door on my '88 300E suddenly began refusing to glide shut. Now I practically have to lean on it. It was all of a sudden so I'm thinking it must be the thing that provides an intermediate psotion stop. I can't see anything looking inside where the stop strap thing goes but I tried the lasst, desperate act of a muddled mind, I sprayed WD40. No joy.

I have read that pulling and replacing the door panels is a be-atch so I'm deeply reluctant. BTW, I also have the left door post panel off because the MB Tex was pulling away from the shoulder harness slot. Anybody ever reglued that? The foam padding/glue over the flat surface is completely shot so I washed and scraped it off and thoroughly cleaned the post panel, itself.

My "plan" is to use spray adhesive over the flat portion and after it dries, use Rhino Glue to glue the portions that curl over the edges and attach to the inside of the panel.

(If my wife doesn't heal-up soon I'm gonna start breaking things for something to do. I just mowed and trimmed the lawn and swept the house. Cooked breakfast, did dishes. I refuse to watch "Raiders of the Lost Ark again. Kee-riste, I'm going crazy!)