My daughter just bought a new Sonata, and on her first trip, the nav system quit. She took it in to the dealer, but they have to order a replacement, and she had to leave on another trip. Before she left, she ran it through a car wash, and the nav system started working again. Since she's on the road, I don't know if it's working now or not. They didn't have a manual for the nav system when she got the car. Is there a way to 'reboot' the system? Any ideas?