Mercedes-Benz M106 engine
The Mercedes-Benz M106 engine is a high-revving, prototype, four-stroke, 2.5-liter, naturally aspirated, V-6 racing engine, designed, developed and produced by Mercedes-Benz for the DTM and later ITC, between 1994 and 1996. History
The new M106 six-cylinder replaced the previous four-cylinder engine used in the Mercedes-Benz 190E during the past seasons. It is a brand-new V6 with a displacement of just under 2.5 liters. Very loosely based on the 4.2 liter V8 used in the E 420 and S 420 models, the new engine uses a cylinder bank V-angle of 90 degrees. Equipped with twin overhead camshafts and four valves per cylinder, the compact unit nevertheless only weighed  due to extensive use of alloys. Initially producing between , it drives the rear wheels via a six-speed sequential gearbox that was fitted at the rear of the car to improve the weight balance. While Alfa Romeo's model featured four driven wheels, Mercedes-Benz was restricted to only a rear-wheel drive setup for their new DTM racer as none of the road-going C-Class models used four-wheel drive. The 1996 iteration of the engine developed over , and revved over 11,500 rpm. Applications
Mercedes-Benz C-Class DTM (W202)

References

Mercedes-Benz
V6 engines
Mercedes-Benz engines
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Internal combustion engine