Does anyone know how to take this out when it is in the locked up position?

Mine won't release, and i can only reveal a little bit of the mechanism by pulling the rear backrest cushion up.

its the release on the rear seats so u can fold them down to make the boot bigger.

Sorry, didnt read it good.
Did U try to pull them very hard, when you pull the release levers on the seats. Dont know if its possible to remove the lock when the seat is in a locked position.

it releases on one side and not the other. Its clearly broken because the lever is pulled forward. U normally pull foward to release.