E28 vs E30 vs w123

Moin moin all on the other hand, since my Golf CNG spar bush can no longer be on the road, I need a new car. Diesel is unfortunately mandatory, since I do more than 25k KM a year. Hazards are the new sweetheart only on salt-free road, for the winter months it is preserved decently underfloor and hollow space. I mostly drive long distance (Kiel-Berlin or Kiel-Neumünster), which is why comfort is relatively important for me. I would be willing to take up to 10,000 euros in my hand and ask myself which car you would choose for the above-mentioned conditions. Thank you so much and best regards Tom