Originally Posted by Shell
Fold down rear seats by opening ski hatch and, using a stick or similar, pushing on one of the seat releases in the trunk through the hatch. Once the seats are released, fold them down and either reach into or crawl into the trunk and pull the emergency release cord mounted in the trunk lid. It worked for me. Of course, I'm assuming US spec cars have the emergency release.
Unfortunately this car does not have the fold down seat option. I think a crowbar is the only option.