A while back I posted a thread about a dead flat battery that occurred in a 2 day time period. When I got the car back from my mystified mechanic. The next morning I was shopping and hit the door lock button on the key. The drivers side door would not lock. I tried it a few more times with the same outcome. So here is the question. Could the door lock interface keep trying to lock the door for 2 straight days. So it was using power to try and lock the door and this might be the issue?