Lift up on clips
You actually have to lift the red clips up slightly while applying a slight amount of pressure to the front of the seat bottom to get it to release. It goes back in with about the same difficulty.
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan