I have 2011 Ford Edge and have learned that if you have a Ford that is pretty well loaded, like mine, no key just a button and a lot of, the onboard computers, it will draw 3 amps while in the sleep mode, while being towed and the battery will go dead. I had 2 different Ford engineers work on my Edge and it can not be fixed. You can't disconnect the battery. Ford says that it is running as designed and it is, but they don't tell you the battery will go dead in the owners manual. As on 6-1-2011 they have made a change to the owners manual for the Edge and at least the Explore that you have to stop every 6 hours and run the motor for 5 minutes. If I had known this I would have not bought the Ford Edge. I AM GOING TO SUE FORD, and then buy another Jeep.