I downloaded latest (Oct) map update onto a Usb stick I've previously used. Map started top upload to the car as expected whilst Was sat in the drive with the ignition pin. Then i had to exit the car, leaving the ignition on, to speak to a neighbour and the car switched itself off ( because I had the key in my pocket perhaps? ) during the map update which obviously caused it to fail. Now the may won't update and I get the error message inviting me to retry. I have retried multiple times, even tried a different USB stick with a fresh download on, restarting the info system, locking the car for several days etc all to no avail. I can't be the first person to have caused a map update to fail so is there a way to sort without visiting the dealer which in my case is a 160 mile round trip? Grateful for any advice as to things I can try.