Leon FR 1.8 TSI switch What to look for when buying?

Hello, drive a BMW E46 at the moment and would like something new. Were in the surroundings in different car dealerships, where good used ones can be found. Amongst them also the Seat, in which I totally forgot: Leon FR 1.8 TSI, EU6, 6 gear switch, 1st hand, 51.000km, EZ 2013 Would like to go tomorrow and make a test ride with the good one. What should I absolutely pay attention to? Don’t know me at all with Seat, but one colleague said that Seat is generally building robust cars! Price is at 1 7.xxx€ struck, maybe I would get a little down, as my eyes have discovered a few blemishes Thank you!