5. Mercedes-Benz W123
The Mercedes-Benz W123 is revered for its overengineered build and near-indestructible diesel engines.
Produced from the late 1970s through the mid-1980s, the W123 became the backbone of taxi fleets from Europe to Africa, often seen with half a million miles—or more—on the clock. Its solid construction and simple mechanicals make it easy to maintain, even decades after production ended.
Today, it’s not uncommon to spot these sedans and wagons still in daily service. As Classic Driver notes, the W123 stands as an enduring testament to Mercedes-Benz’s commitment to quality and durability.