Be sure you move the seat all the way forward and then take a good look and see what you can find at the rear of the seat, should be a couple bolts, one on each side...remove them and then slide the seat all the way back...then do the front bolts...there are 2 different rails in some 123's..one rail lets the seat slide forward and backwards and the handle is in front of the seat next to the console and the other rail has a handle that is on the side of the seat near the door and you pull it up and then you can move the seat forward or backward and the seat will elevate...goodluck...Jim

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James A. Harris