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While I was driving today and trying input a destination using voice commands into the GPS, the My Ford Touch screen froze. It remains frozen on that screen even if you turn the car off and walk away for awhile and then turn it back on. So no way to turn on the radio (it's muted to be in Navigation voice command mode), or get to the camera when backing up, etc. (Earlier I discovered the clock had reset itself - it was showing something like 1:30 a.m. even though it was 2:45 p.m. - the second time that has happened. First time I took it to dealer and was told they were unable to reproduce the problem.) I called dealer service department and asked if there was any way to reboot the My Ford Touch screen computer without having to bring the car into the service department and lose use of it for the day. The guy checked with a technician and relayed that the tech always tries disconnecting the negative on the battery, waiting 10 minutes, and then reconnecting it. If that doesn't work, they said, maybe it is a software issue and I should bring it in. I popped the hood and got out the manual to disconnect the battery, but all it says (pg 289) is that the battery is maintenance-free and when it needs to be replaced I should bring it in to an authorized dealer. It does go on to say that if a technician has disconnected the battery I'll lose things like radio settings and clock and so should be prepared to restore those settings. Anyway, does anyone know how to disconnect the negative on the battery? I peered at it myself but couldn't figure it out. Does this require special tools? Since the dealer tech relayed that as a thing to try, I suspect it can be done. (They're closed now until Monday or I'd call back.)