[denisond3]

In your situation I would recommend opening the other side rear door, and seeing what it takes to get the inner panel off. If this isnt feasible with the door shut, at least you can look at the latch mechanism on that other door. Its likely one of the control rods has come free of where it fits into the lever on the latch mechanism, and could show you where you could put a thin steel rod down between the lowered window and the rubber, to shove the 'opening' lever. You might need to have some kind of a 'hook' cut into the thin steel rod.

If that isnt workable, you might be able to manipulate the 'child safety' tab through the gap in the door-to-body, once you see where its located on the door that does open. Expect it to be stiff though, from lack of lube and lack of use.

I had to fight the Jeep rear door mechanism, as it wouldnt open from the outside, but at least no one had activated the 'child safety' feature, so I could open it from the inside.

I had to get a new plastic 'rod retainer' from an auto parts store. In the little bubble packs of Dorman or "Help" products was an assortment of the little rod retainers, and one of them was the right kind.