Which Diesel Daily?

Moin, I’m looking for a car next time, which I can drive the next 10-20 years as much as possible. I’m a car ́ler myself, so screwing is no problem. I’m currently driving a Mercedes 190E 2.3 from 1991 in everyday life. However, as I’m going to change soon and extend my work path a bit and I’m going to drive home on the weekend (about 180km), the 190 is too bad for me and he consumes too much of it. I completely renovated it, so it’s too bad for me. I’m looking for a combination with a diesel engine, H-mark and good rust protection. There are certainly enough cars, such as a Mercedes W/S204, but that’s actually too modern and, above all, far too expensive in the insurance, since I’m only 20. An Audi 80 B4 or Audi 100 C4 have already fallen into my eye as Avant with the 1.9 TDI. They are already so old that they get an H-mark and still very economical and comfortable. Since I still have a lot of fun and fun. I had a VW Golf 4 SDI once, which was actually top but I went the soundscape at 100km/h and 3000U/min. Animal on the pointer. I’m looking forward to your suggestions.