I believe, and I will stand corrected if somebody has more accurate info, that the 2012 still has the problematic DQ200 7-speed dry-clutch DSG.
So you are looking for a Caddy that has been serviced religiously with a VW dealer or reputable VW-specialist mechanic, including DSG servicings every 60,000km. The 1.6 TDI is a diesel-gate engine, so you may want to know if it has been "updated" with the software fix and the extra intake airflow smoother grid.
Good luck and good hunting.
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