Purchase advice Diesel > 4 cylinders

Good evening, on the one hand, I might need a few more opinions: I am looking for a new car. My main criterion is that it should be a diesel with more than 4 cylinders. By the way, it should be a combination with a manual transmission. Unfortunately, I can’t get past a diesel because my work is 50 km away and I have to commute with the car. The driving performance in the year will be about 30-40k km. The budget is about 20-25k €. Currently I drive a Skoda Octavia 2 RS TDI with 170 hp. I am very satisfied with it, only here and there the first blows occur. Looking for cars that meet the criterion, I have the following models in view: – A4 3.0 TDI – BMW 330 – Volvo V70 D5 Do you have other used cars or does someone have experience at the running costs of the above models?