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Design study: Aero-trailer.

More streamlining for the
vehicle rear end.

With the Boat Tail against air resistance.

Optimised air resistance and fuel consumption values: the Mercedes-Benz “Aero trailer” design study shows how the already low consumption and consequent CO2₂ emissions of modern trucks such as the new Actros can be reduced even further. Streamlining measures at the vehicle rear end present a particularly high potential. The so-called “boat tail” – four slanted 40-centimetre-long flaps – reduces the air resistance of the entire tractor-trailer outfit by around 10 percent. They are folding and impair neither the vehicle’s versatility nor its manoeuvrability.

From deflector to rear-end diffuser.

In addition, a deflector at the front of the semitrailer, innovative side panelling and a rear-end diffuser, flush with the underbody panelling, contribute significantly towards reducing drag. The Aero trailer reduces the drag caused by the semitrailer by around 18 percent and fuel consumption by almost 5 percent. For a mileage of 150,000 km per year this represents savings of around 2,000 litres of fuel and a reduction of environmental impact of over five tons of CO2₂. The only limitation: the Boat Tail makes the Aero trailer slightly too long for current legislation. This is a matter for the lawmakers – exceptions for loading tailgates and rear-mounted fork-lifts already exist for excess lengths of similar magnitude.

Product may vary after press date on 20.02.2012.


* The data do not relate to a specific vehicle and are not part of the specification, but are merely for the purpose of comparing different vehicle types. The figures are provided in accordance with the German regulation "PKW-EnVKV" and apply to the German market only.

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