A decade after the legendary M1 debuted, BMW began offering M-badged models in the U.S. market. One of them was the 1988 BMW M5, a four-door midsize sports sedan known as a "wolf in sheep's clothing" for its stealthy looks and robust performance. Those characteristics have guided every M5 sold since. While modern BMW M5s retain their subtle design, nothing is indistinct about their high-powered engines or their ability to push you deep into your seat under acceleration. Add a lavish cabin filled with technological amenities, and a BMW M5 deftly blends luxury with performance in the way that has defined the car from the start.