I have a 92 100cs that the previous owner had lost all the keys to (exept for the one that he had broken off in the ignition lock ). I got a key made by taking the drivers door lock to a locksmith, it works in the doors and operates the door locks from the trunk, but I can't get the trunk open. The button in the glove box doesn't work either. Can I gain access through the back seat? If so, how should I go about removing it?