a few questions....

[Leeroy]

Hi all, just a few questions if people can help me,

i havent owned my Q7 for long but i was wondering what are the things that go wrong on them mainly or whatshould i keep an eye on??....mine is an 11 plate with 30k on the clock 3.0tdi Sline

 

Next question; 

 

I am tinkering with the idea of getting it remapped?...what is the best tuners/map to get for quality i have been looking at ABT for audi tuners but its just one that came up when i googled it...I live in the north east area and hwta sort of price would i be looking at and what extra figures would it be improved too?...cheers guys and gals