James, along the bottom of the front seat back cover there are two philips head screws that go up into the seat back. Remove the 2 screws then slide the cover down and back. There's a motor about halfway up on the right side. A cable will snake across the seat to a mechansim on the left headrest guide post. There might be enough slack to simply pull out the cable. Otherwise remove the headrest by raising it to the highest position then pressing on the button on the left guide post to release the headrest. Same as on a non motorized headrest seat. Slide up or down (should be obvious by the keyhole slots) the clip on the left guide post to release the rack that moves the headrest. That will give you the slack to remove the cable.

Hit Man, the seat cushion cover is easy to remove. With small hands you can do it without removing the seat from the car. Feel along the lower front edge of the seat for the seam between the hem of the seat cover and the metal frame of the seat. Use a plastic putty spreader or something like that to pry the hem forward. Put weight on the seat cushion then slip the seat cover hem down and free of the channel that retaines it. Put weight on the sides and rear edges to release the hem all around. The seat cover and padding should come off the seat frame. I've never removed the cover from the seat back but I removing the rear cover should reveal how it's retained.

Sixto
93 300SD