Mercedes introduced the W123 to European markets in sedan form in 1976. It was the next step beyond the W114 and W115 coupes and sedans that had been around since 1967. Two years later, a station wagon version of the W123 debuted, along with the legendary OM617 3.0-liter five cylinder turbodiesel engine. United States buyers got the turbodiesel 300TD beginning in 1981, when that model sold about 28,000 units worldwide (via Mercedes Heritage). W123s were also tagged as the 300CD
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