Safe, stylish, good MPG?
If you can live with the performance (which I suppose you do since you post here
), check out the 80's / early 90's Merc Diesel, W201 (190) & W124 (also comes as estate).
Engines run forever, you can pour WVO right in, safe for their age and easy to maintain.
Mercedes-Benz 190D Mileage | Fuelly
1985 Mercedes-Benz 200D Mileage