I got a lettre from Audi telling me that there is a complimentary software update available for my sat nav. All I have to do is book it in to an Audi dealer before the end of September. I spoke to the dealer in Edinburgh earlier today and was told it would take 3 hours to do the update. I questioned this as it's only a software update but he was adamant he needed the car for 3 hours. Does anybody know what this update consists of?