We have significantly reduced the noise emissions of our passenger cars, trucks, and buses in recent years through a series of improvements. Our main concern at present is to find satisfactory solutions for the conflicting objectives we repeatedly face in the area of noise reduction. Especially in commercial vehicles there are technical areas in which reducing noise and lowering fuel consumption are at odds. Thus, for example, an encapsulation of the powertrain dampens the engine noise. At the same time, however, it requires a stronger cooling system, which raises the fuel consumption. The additional fuel consumption can be countered with higher injection pressures, which in turn lead to a harsher combustion noise.