Have you tried removing the bottom portion of the seat to see if that will give you access to whatever is preventing the armrest from going up? It's been a while, but _if_ I remember correctly (last time I had my back seat out) you might be able to reach up under the armrest and un-jam it... if all else fails you might go ahead and remove the seat back and access the armrest mechanism from the back side... Hope this helps. -Raven