Went out to strart the car after it sat for 4 days and it was completely dead, no interior lights. Had to towed into a buick dealer and they replaced the battery that was 5 months old and cleaned the cables. It ran fine for 1 day and then after sitting for 2 days it was completely dead again, no lights and completely dead. Put a charger on it and took it back to the dealer and they thought the possitive battery cable was bad. They replaced the cable and let it set for the weekend and on Monday it started up fine. I took it home Monday night and Tuesday it was completely dead again.