New vehicle (diesel) Budget at approx. 12.00€ Max. ?

Hi guys, I’m currently driving a Seat Ibiza 6J with the small 1.4 petrol engine, because of my high KM performance per year ( Up to 30,000km, 70% AB & Landstraße ) I would like to get a diesel… Working distance is about 50km … of which 50% highway and 50% highway. Also with Ibiza I manage well despite the few 86 hp. However, this can probably accelerate on the highway already everyone can think My new vehicle should definitely not exceed 125,000 I have already let a few vehicles go through my head… I find it interesting to see the Seat Ibiza 6J (from BJ 2009) in the 2.0 TDI FR / Bocanegra variant! Again I think about whether I should reach for a larger vehicle.. e.g. a Golf 6 or even a 3 Series BMW e90 / e92 ? I have already read a lot of bad things about VW’s 2.0 TDIs.. there should be quite a lot broken, at least with the PD engines, with the CR I know there At BMW I don’t know which engine I should be gripping, where in my price range would only be a 316.318 & a 320er.. Which vehicle / With which engine would you advise me ?I thank you in advance for your efforts !