I purchased a 3.2 v6 GT two weeks ago. Today, i parked up clicked the button to lock the doors. I was gone for five minutes. I came back, clicked the button, the lights flashed as normal, I opened the door, got in and the car was dead. Even the window did not shut when I closed the door. The man from the RAC boosted the battery to start it. Ran it, switched it off, started it. Could not find a short / fault / loose connection. I drove home. When I switched off, it was dead again. Any ideas?