First attempts by Daimler-Benz to assemble a 6-cylinder diesel engine in a Mercedes-Benz Mannheim chassis ultimately failed due to its enormous vibration. 1935 saw the successful installation of the smaller OM 138, 2545 cc overhead valve, 4-cylinder engine in a Mercedes-Benz 230 (W21) chassis.
Daimler-Benz's initial attempts to integrate a 6-cylinder diesel engine into a Mercedes-Benz Mannheim chassis were unsuccessful due to excessive vibration. In 1935, they successfully installed the smaller OM 138, 2545 cc overhead valve, 4-cylinder engine in a Mercedes-Benz 230 (W21) chassis.