Apologies if this has been answered elsewhere (I've looked, and can't really find an answer!), but what do I need in order to upgrade the Sat Nav map on my October 2010 A6 S Line?

It has the 3G (not 3G +, as no joystick or HDD) MMI

Currently running the 2010 Map (which is pretty useless to be honest!)

And is this a simple case of swapping the disc, or is it a visit to my local Audi Centre to be relieved of vast quantities of cash?!

Also, is this disc only, or can it be updated from an SD card?

questions, questions, questions I know, but all help appreciated!