The two Mercedes-Benz Unimogs were on an expedition to place new emergency radios on the Ojos del Salado volcano.

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They reached 6,694 meters, or 21,962 feet, setting a new world record for wheeled vehicles driving at altitude.

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For the journey the trucks were fitted with big off-road tires and bodies with variable centers of gravity.

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The leader of the expedition previously set the record for driving a truck at altitude with a Mercedes Zetros on the same volcano in 2014.

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Not only is Ojos del Salado the tallest volcano in the world, it's the second-tallest mountain in both the Southern and Western Hemispheres.

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