(1) To get into the hatch, remove the DS license plate light. Search "emergency hatch release". (2) Its usually the drains under the spoiler that runs thur the hatch an out ,above the plate that deteriorates. Make sure, its not the hatch seal or the fuel door seal that is doing the leaking. If you got that much water out thur the relieves (1/2 gal.) , there's a foam casing surrounding the pump that is probably holding ,twice that much. And that would be your problem.