My drivers seat is like that too. The lever just pulls up and doesn't release anything most of the time. It seems like it's caused by the adjuster knob coming off and letting all the plastic parts under it spread out so their not lined up and interlocking anymore. I put some glue on it and smacked it on tight and now the lever works a lot of the time. Ususally tweaking it left and right while you lift it will make it catch so I can tip the seat. How long does the warantee last on the seats? I should see if they will fix mine, although I probably messed it up when I put the glue on it.