Mercedes D.I

D.I
Type Inline piston engine
National origin Germany
Manufacturer Mercedes
First run 1913
Developed into Mercedes D.II

The Mercedes D.I (also known as the Type E6F) was a six-cylinder, water-cooled, SOHC valvetrain inline engine developed in Germany for use in aircraft in 1913. Developing 75 kW (100 hp), it powered many German military aircraft during the very early part of World War I.