Audi A3 What do I have to pay attention to when buying a used car?

Hello I will see on Sunday an Audi A3 with 60,000 km and a first registration from 2007 for 10,000 tsd Euro because I unfortunately have no big idea of cars I wanted to inform myself what I could pay attention to when buying and where the Audi A3 is susceptible to wear and further thanks in advance !