There should be a little compartment on the inside of the rear door. Open this and feel around for the emergancy release lever.

Since most of the screws that hold the inner hatch pannel in place are not accessible when the hatch is closed, most people resort to cutting or breaking apart the inner pannel, readjusting the opener mechanism and then buying a new inner pannel. DO NOT DO THIS! Here is what worked for me on my 1996 Grand Cherokee. 1. Straighten out a metal coat hanger and bend a small hook on one end. 2. Remove the top screws on the inner pannel. 3. Gently pull the top of the pannel open about an inch and shine a flashlight inside the hatch. Mine has the pop up glass which makes this a little easier. 4. Slide the hooked end of the coat hanger inside the hatch while a friend works the release handle up and down. 5. Inside the hatch, at the bottom of course, you will see the release arm moving. Simply hook the arm with the coat hanger and pull up! 6. It may take a few tries, but the hatch will open easily. I was able to open my hatch in less than 15 minutes by myself. Once the hatch opens, remove the remaining screws and you will see that the release arm is adjustable. The arm is threaded and simply pops into a metal clamp. Pop it out of the clamp, pull up on the arm to take up as much slack as possible, and pop the arm back into the clamp. Replace the inner pannel and your done.