Hi there

Welcome. A fine choice of steed!

I've had my 2010 170 S-line Quattro for 18 months and 27k miles now (just gone over the 100k) and the only issue I had was a knocking lower steering column. Look out for a slight 'dull thud' coming through the steering wheel, every quarter turn or so at parking speeds. It turned out to be the section of the steering column that disappears through the bulkhead near the pedals.

Apart from that, no issues at all.

Obviously make sure the clutch is strong and the biting point is nice and low (quattro clutches can take a beating as they just don't spin the wheels, so the clutch takes the abuse if the former keeper/s were lively off the line). Obviously do the usual checks you would when buying a used car (service history, speak to former keepers if poss etc.)

Oh, and at 53k, you'll want to run it in! Should be nice and loose at about 100k! ;-)