I've stayed out of this thread because I don't want to be a party-pooper, but having been involved w/ Mercedes for many years, including owning at least 10 vintage cars, I would say that those seats are worth about the same as if they were vinyl Mazda seats. They are not specific to any collectible or valuable car, they are MBtex, (vinyl, although it wouldn't make any real difference if they were leather), and there is simply no market for them. It would cost more to ship them 100 miles than they are worth.
I would seriously turn them into garage chairs. They're pretty comfortable.
