I thought wagons started in '88. I have a short install video on Youtube I put together for someone who bought some hardware I had. Removing the seat cushion from the frame is the most difficult part...A lot of the '90+ T-modells came with the double roller blind, though many have lost them by now. They can technically be retrofitted, but it's probably best to just buy a car with all the attachment equipment already in place. I'm in the process of installing that stuff on my '87, and it's a real chore.