According to motoring magazine Autosport, the Portuguese Mercedes is presently resting in a Mercedes museum in Stuttgart despite being in great shape for such a well-travelled vehicle.
The white Mercedes-Benz clocked up a massive 1.9 million kilometres during its service life, and was used as a taxi for over a decade.
However the Portuguese cab ranks only 6th on the top-ten list.
Filling the top five spots are a 1966 Mercedes Benz coupé, in 5th, with 2.06 million kilometres; a 1983 Lincoln Town Car from Kansas (US), which notched up 2.1 million kilometres placing it 4th; the 3rd most-used car in the world is a 1963 Volkswagen Beetle, with 2.6 million kilometres on the clock, and in second place, a 1971 Mercedes Benz from Greece, with 4.6 million kilometres.
The car with the most kilometres on the clock in the world is a 1966 Volvo P1800, which is still owned by its original owner, and, after having undergone three engine repairs, has covered 4.8 million kilometres.