I found errors on my navigation map when I picked up my 16 plate A3, new last year! I enquired about how to update the SD card, but AUDI had no update procedure, as far as I know, you still have to buy an updated card from AUDI at a huge extortionate price! You can buy a 32 G card for £20! When I go on long trip, I also take my TomTom with me! So good luck!