Bummer. Disconnecting the battery is one of my SOPs for many automotive projects. I don't mind resetting a code, I've always had to do that in my Audi. The bummer is losing the A/B trip meter info. Or do you get to enter it back in and keep going? (I'm keeping my trip B meter for my overall, or at least for a long term)When re-energized the radio needed a code, and the date, A & B miles, averages, and time needed reseting. PITA.