Seat Ibiza Cupra Tdi purchase advice

Hello everyone, due to long distances on the weekend about 600km. If I would like to switch to a sporty diesel, I like the Ibiza Cupra quite well. Is there anything to consider most on the internet have already relatively high running performances. I have now picked one out for 4000 €. Year 2006 with 170 Tkm. Check-book-pimple. Teeth belts made everything and basically the usual Cupra equipment. Now you let in forums that somehow nevertheless some can break. W However, it can happen with any vehicle there are any diseases? How is this compared to the 131 Ps Variente? Should you even look at the vehicles at the mileage? Thank you!