Well, today something weird happened. In the afternoon (very hot day) the battery died! As I was checking what the problem was I heard a noice coming from the read door. A clicking noice as if the lock was trying to unlock. I jump started it and the engine was not running right I had to accelerate in order to have it running. But I could feeel that something was not right and something like an electric short was causing the trouble. Fortunately the Jeep dealer is near where I was so I drove there and ask them to see if the door lock was in some kind of electric short. Left the Liberty there thinking that it had to stay until Monday or Tuesday, but no they call me a couple of hours later saying that the problems was with the battery!
That is had an internal short and that they had to replace it! The told me that htey check everything else including the door and that everything was OK! :)
So I picked it up, tested the door and everything seems alright. The car is running fine!
As I have never heard of something like this I wanted to share it with all.