We bought our Edge 1 week ago. When we got it, I synched my S5. This evening hubby and I were going somewhere and he plugged his S4 charger into the USB port. Things went haywire from there. The MFT screen said it was "indexing device". I plugged my phone into the 12v power port on the right side of the console. When we arrived at our destination 30 minutes later, it was still indexing, and my phone wasn't charging. Got back in the car after 3 hours. Still "indexing device" and my phone wasn't charging. In fact it was running out of battery fast. Shortly after we left, we got a message saying the Nav card needed replacing. I can't find anything in the manual about this. Can anyone help?