Mercedes-Benz M18 engine

{{Infobox automobile engine

|image =

|name = Mercedes-Benz M18

|manufacturer = Mercedes-Benz

|production = 1933-1937

|configuration = Inline-6

|bore = {{convert|78|mm|in|1|lk=on|abbr=on}}

|stroke = {{convert|100|mm|in|1|lk=on|abbr=on}}

|displacement = {{convert|2.9|L|cuin|0|lk=on|abbr=on}}

|valvetrain = 12-valve, SOHC, two-valves per cylinder

|power = {{convert|60|hp|kW|0|lk=on|abbr=on}}

|torque = {{convert|100-103|lb.ft|N.m|0|lk=on|abbr=on}}

|fuelsystem = Carburetor

|fueltype = Gasoline

|compression = 5.75:1

|oilsystem = Dry sump

|weight =

}}

The Mercedes-Benz M18 engine is a naturally-aspirated, 2.9-liter, straight-6, internal combustion piston engine, designed, developed and produced by Mercedes-Benz; between 1933 and 1937.{{Cite web|url=https://sportlichleicht.com/info/engines/m18/|title=Mercedes-Benz M18 Engine|website=Sportlichleicht.com|access-date=10 November 2021}}{{Cite web|url=https://www.ultimatespecs.com/car-specs/Mercedes-Benz/32602/Mercedes-Benz-W18-290.html|title=Mercedes Benz W18 290 Technical Specs, Dimensions|website=Ultimatespecs.com|access-date=10 November 2021}}{{Cite web|url=https://www.ultimatespecs.com/car-specs/Mercedes-Benz/M6756/W18|title=Specs for all Mercedes Benz W18 versions|website=Ultimatespecs.com|access-date=10 November 2021}}{{Cite web|url=https://www.supercars.net/blog/1933→1937-mercedes-benz-290/|title=1933→1937 Mercedes-Benz 290 | Review|website=Supercars.net|date=18 April 2016|access-date=10 November 2021}}