The Mercedes-Benz W 180, better known as the Mercedes-Benz 220 or 220 S, was a luxury class model with a six-cylinder engine from Daimler-Benz between 1954 and 1959.
The “big” Ponton Mercedes, successors to the “Mercedes-Benz 220”, were built in parallel to the upper middle class W 120/W 121. Wikipedia

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