Mercedes-Benz M178, M176, and M177 Engines for Sale: Specifications, Performance, and Availability If you’re looking for Mercedes-Benz M178, M176, or M177 engines for sale, you’re probably after world-class performance cloaked in German engineering prowess. These powerplants are at the center of some of the most well-known AMG and high-performance Mercedes cars—and we have them available