Detroit DD5 engine, Freightliner M2106 test drive We’ve previewed it, detailed the Detroit production facility, and, now, Fleet Equipment finally got its hands on the new Detroit DD5 engine outfitted in the Freightliner M2106. Yountville, Calif., is nestled in the heart of Napa Valley and was the perfect place to put the DD5 through a mock pick-up-and-delivery route. I talked with Chris Moran, MDEG program manager for Daimler Trucks North America, about the new engine as the company readies it to roll onto roads. The DD5 is a 5.1 liter, four-cylinder engine, which is squarely aimed at P&D applications right out of the gate. Four-cylinder engines are a growing trend in the medium-duty segment, particularly in P&D, and you might be thinking: Can a four-cylinder engine get the job done? I put that question to Chris for his take on the trend. Watch the video above for his answer and even more insight.