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Mercedes-Benz is collaborating on a pilot cellulosic ethanol project with specialty chemical companies Clariant and Haltermann. According to the press release issued by Clariant, "[o]ver the next twelve months, test fleet vehicles can be refilled with the new [E20 cellulosic ethanol] fuel at a specially equipped gas station on the Mercedes-Benz site in Stuttgart-Untertürkheim. The cellulosic ethanol comes from Clariant's sunliquid® demonstration plant in Straubing, where approximately 4500 tons of agricultural residues such as grain straw or corn stover are converted into cellulosic ethanol each year. At the Haltermann plant in Hamburg the bioethanol is mixed with selected components to form the innovative fuel, the specifications of which reflect potential European E20 fuel quality." A copy of the press release is available online.