2018 2.0T. New car has Garmin 2017 navigation map release. I Followed instructions to update the map to the 2018 version via USB connection. Steps 1 and 2 worked fine. However, when I started step 3 and inserted the USB Thumb Drive to complete the update I continue to get an error that the system cannot find the update file. Has anyone followed the steps outlined in the Navigation Update instructions and had success? I am confident that the Garmin Express program (used in step 2) put the updated map file on the thumb drive.