The S 511 HD is a Setra ComfortClass 500 vehicle, part of a model series which includes the two-axle S 515 HD, the two- and three-axle S 516 HD, as well as the three-axle S 517 HD and S 519 HD. This series has retained the classic elements of innovation, comfort, efficiency and safety already well established in the Setra vehicles, yet they are now wrapped up in an entirely new design.
Typical features of the ComfortClass 500 include the flowing side line which first rises slightly before falling again at the rear. At the B-pillar, the sideline also features a decorative element. Meanwhile, a soft movement line runs along the entire length of this newly developed vehicle.
The extended rounding of the roof at the front and the much greater curvature of the windscreen are two distinctive features. Thanks to the new aero rear-end and other features, the ComfortClass 500 achieves a Cd value previously ruled out for this segment (0.33). The vehicles in this series are powered by Euro VI engines from Mercedes-Benz with the associated exhaust gas technology. Developers were able to reduce particle emissions by up to 60 percent, as well as nitrogen oxide emissions (NOx) by up to 80 percent, while also reducing fuel consumption – figures that lie very close to the detection limit.