Mercedes-Benz M136 engine

The Mercedes Benz M136 engine was a 1697 cc otto-cycle (gasoline) inline-four engine introduced by Mercedes-Benz in 1935 for its new W136 sedan. It was initially used in the W136 170 V.

It was enlarged to 1767 cc in 1950 and installed in the W191 170 S variants, and remained in production until 1955, when it was replaced by the 1.9-litre single overhead camshaft inline-4 M121.