I've owned a 2011 Edge since 2011 and when the weather is cold (below 20 degrees) I get a message on my in touch screen that the battery saver system has malfunctioned, restart your engine and turn the ignition off. Doing this gets the same result and I get the battery saver system has malfunctioned again. I've had the vehicle to a dealer twice and they cannot find a solution. Now when it is cold I get the message about the battery saver system and when I take the key out of ignition the radio stops working right away. Looking for some help, please