I'm once again looking at A3 tdi's. Prefer either 1.9 105bhp or 2.0 140bhp. Budget is £6k max. Looking at a few on auto trader and noticed a few subtle changes between updates (grills, steering wheel etc) but could really do with a used buyers guide on what to look out for. Btw, ideally looking for a totally standard car to personalise. Thanks in advance