Pjbotham

Hi, new to the forum so thanks for having me...I got my first Audi last year, a 56 plate A6 diesel. I'm travelling in France next month and need to update the sat nav - I'm hoping someone can give me some guidance as to what I need to do and where I should go? I've done a google search and there's a number of options from what I can see but prices vary from 30 quid to 250+! I've got the colour screen mmi if that helps