Mercedes-Benz debuted the double overhead cam (DOHC) OM 606 diesel engine to replace its single overhead cam OM 603. The OM 606 design was based on the gasoline-powered six-cylinder M103 and M104 ...
The M103 6-cylinder engine originated in the mid-’80s when Mercedes released its legendary W124. The company would later introduce the improved M104. The M103’s reliability was due to its ...