The seat adjustment assembly is held to the seat bottom frame by three fasteners on each side.

The forward - aft track has to move in order to line up a window for the middle fastener.

If you try to separate the seat back from the seat bottom, you will end up destructively removing the plastic covers on the hinge.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles