Hi, I have a ford focus mk2.5 Sport TDCi It was registered in January 2011. I think this model was produced to use up parts when the Mk 3 came out! Anyhow it has Ford's built in sat nav. It's not the touch screen version. It's maps are on SD card and I believe they get updated by a CD supplied by Ford. It's been working perfectly since I got the car in October last year, but yesterday it's showing the car way off from its current destination. I did the in built calibration, but that didn't seen to do anything. I then manually put in its destination and then took it for a drive but it showed m