Hey guys, this is my first question here. I just bought a 2012 Prius 3 and sold my wife's BMW 3. I still have my X5 though and one of the convenience I'm missing in the Prius is having the cigarette lighter adapter always supplying power even though the ignition is in 0 position and key out of the socket as in my X5. I asked the Stealer before I signed the papers but he didn't seem very knowledgeable (and he was a Fleet Manager, whatever the hell that means So, my question is is this doable and if yes, how hard is it to do? Anyone done it?