Seems as though MB has released their own aero-trailer.
Ugg - can't post links. Anyway, there is an interesting article on greencarcongress.com
http://www.greencarcongress.com/2012...o-2010918.html
(link added by admin... FYI, you can add just the part from the "www" forward in future, until you have enough posts to include links.)
Here is the lead in
"At the 64th IAA Commercial Vehicles Show, Daimler is unveiling the latest result of its “Aerodynamics Truck & Trailer” initiative, the new Mercedes-Benz Aerodynamics trailer and separate Aerodynamics rigid truck.
Trailer. Designed and developed by Mercedes-Benz, the new trailer lowers the air resistance of the entire tractor/semitrailer combination by approximately 18%. According to the engineers’ experience, this results in a fuel consumption reduction on long-haul journeys of approximately four to five percent in real conditions. Intensive measurements in the wind tunnel with a 1:2.5-scale model confirmed the arithmetic assumptions."