The current Mercedes-Benz high mileage champ is Gregorios Sachinidis, a Greek taxi driver who holds the known record of more than 2.8 million miles in his 1976 Mercedes-Benz 240D.

When Sachinides bought the 1976 model in 1981 it already had 500,000 kilometres on the clock.

Sachinides clocked up the kilometres driving round the streets of Thessaloniki, but also made hundreds of journey to Belgrade to transport medical supplies during the war in the Balkans.

He changed the engine three times but the car kept going strong.

He was so pleased with his car he wrote to DaimlerChrysler boss Juergen Hubbert to thank him personally for the outstanding service.

https://www.mbusa.com/mercedes/heritage/events_community/overview/feature/id-689a3e9630b9d210VgnVCM2000007d184335____/pdf-highmileageaward
https://allaboutdieselz.blogspot.com/2017/10/the-highest-millage-mercedes-benz-with.html
https://www.expatica.com/de/last-ride-for-mercedes-taxi-with46-million-kilometres-on-clock/

The Mercedes-Benz Classic High Mileage Award is presented to owners whose vehicles have logged 155,000 miles or more.

Drivers

receive a traditional Star and Laurel Badge and handsome display certificate in a formal presentation folder. Awards are presented at five vehicle mileage milestones.

Award Milestones
155,000 miles (250,000 kilometers)
310,000 miles (500,000 kilometers)
466,000 miles (750,000 kilometers)
621,000 miles (1,000,000 kilometers)
1,000,000 miles (1,610,000 kilometers)