Hi: If the trunk release doesn't work and the key feels like there is no resistance, the latch assembly must have broken. Yes you can remove the rear seat by pulling up on it, but it may require a good bit of effort.
I realize this is something that needs fixed and if I was there I would do it for you but I can't. Therefore, I recommend you take it to a mechanic for repairs. The latch assembly most likely needs replaced and no there is no emergency release to open the trunk.
If you have any other questions, let me know and I'll do my best to help you.
Friday, November 7th, 2008 AT 9:50 PM