I've poured gallons of water with a hose (used a pressure gun too) all over the car, but I still can't pinpoint the leak as no water comes in. If I take it to the dealer, they'll probably just follow the book eliminating known issues and charging me each time without any guarantee that the problem is solved - just like it happened last time.

Those of you who had an AC drainage leak, did water appear on both sides of the rear carpet or only one?