The reason for asking about your budget was to see which model you might be buying.
From another thread it looks like a 2014 Tdi or similar.
Good car despite the VW emissions fraud!
Buy as late as you can with as few miles as possible and a get a good warranty.
Use premium diesel from fuel stations with a good turnover of stock.
Reset the gearbox on any car you test drive before setting off.
Turn the ignition on but do NOT start the car.
Press the accelerator pedal firmly to the floor and hold it there for a full 10 seconds.
Release the pedal.
Turn the ignition off and remove the key.
You will now have cleared any previous owner's type of driving.