2012 audi a7 tech pack?

[Cook_90]

Hi everyone, I've just put a deposit down on a 2012 audi a7 STronic 240bhp with tech pack. 

From research before buy the car I guess I have picked right with the stronic? 

Also the tech pack? I believe it has a slightly larger screen and a hard drive to store music but not exactly sure what the tech pack includes??

Iam also looking into investing in a diagnostic tool for the audi if anyone has any suggestions? Not too expensive but not one that's just going to give me the generic P codes

Thanks in advance