I am currently looking into buying an Audi q7 from probably the 2010-15 versions from an auction. I owned a few A4's over the years so I know the basic issues Audis tend to have but I want the Q7 to last me a longer time so what are some common problems/issues I should be prepared for and what are some things to look out for when looking for auction Q7's like any expensive sensors that may be hit or etc..