7. Mercedes-Benz E-Class Diesel (W123)
The Mercedes-Benz E-Class Diesel (W123) is celebrated for its remarkable longevity, especially in its diesel variants. These vehicles were a favorite among European taxi drivers, many of whom easily exceeded 500,000 miles—sometimes even doubling that.
Numerous private owners have recorded similar feats, as detailed in Hemmings’ coverage of million-mile W123s.
The W123’s robust engineering and iconic diesel engines have secured its place as a true high-mileage legend.