The legendary 3-liter 300 SLR (Sport Leicht-Rennen, eng: Sport Light-Racing) was derived from the W196 for the 1955 World Sportscar Championship season. Firsts included the use of desmodromic valves and Daimler-Benz developed mechanical direct fuel injection adapted from the DB 601 high-performance V12 used on the Messerschmitt Bf 109E fighter during World War II. The Messerschmitt Bf 109, sometimes incorrectly called the Me 109 (most often by Allied pilots and aircrew), was a German World War II fighter aircraft designed by Willy Messerschmitt and Robert Lusser during the early to mid-1930s.
The “Bf 109” Designation was issued by the German ministry of aviation and represents the developing company Bayrische Flugzeugwerke (at which the engineer Messerschmidt led the development of the plane) and a rather arbitrary figure. It was one of the first truly modern fighters of the era, including such features as all-metal monocoque construction, a closed canopy, a retractable landing gear, and was powered by a liquid-cooled, inverted-V12 aero engine. By the end of World War I, V12s were well established in aviation, powering some of the newest and largest fighters and bombers and being produced by companies such as Renault and Sunbeam.
Many Zeppelins had 12-cylinder engines from German manufacturers Maybach and Daimler. Austro Daimler of the Austro-Hungarian empire, produced also V12, designed by Ferdinand Porsche, with first 300 and later 345 hp, used with the big flying boats of the A-H Naval Air force.
Most production V12 engines in road cars have an even firing order, with the uneven-firing exceptions such as Aston Martin 5.9L V12 and Mercedes-Benz M275 AMG V12s.
Source: Wikipedia
Note Engine:
Aviation, 1 × Daimler-Benz DB 605A-1 liquid-cooled inverted V12, 1,475 PS (1,455 hp, 1,085 kW).
A 6-cylinder version of the Liberty L-12, nicknamed the “Liberty Six”, consisted of a single bank of cylinders, with the resulting engine bearing a strong external resemblance to both the Mercedes D.III and BMW III straight-six German aviation engines of World War I.
Car, Mercedes-Benz CL600/CL63 AMG (W215 only)/CL65 AMG
Mercedes-Benz S600 (W140, W220, W221, W222) / S63 AMG (W220 only) / S65 AMG (W220, W221, W222)
Mercedes-Benz SL600/SL65 AMG/SL70 AMG (R129)/SL73 AMG (R129)
Mercedes-Benz CLK GTR AMG
Mercedes-Benz G65 AMG
Other Text and photo Notes
https://en.wikipedia.org/wiki/Messerschmitt_Bf_109
https://en.wikipedia.org/wiki/Liberty_L-12
https://en.wikipedia.org/wiki/V12_engine
https://en.wikipedia.org/wiki/Mercedes-Benz_W196