Daimler Trucks to Invest Around $200 Million in Detroit Diesel Engine Plant in U.S.: DTNA’s investment will substantially expand the engine production capacity in Redford. Detroit Diesel’s diesel engines with BlueTec technology are extremely fuel-efficient, and they are taking on a pioneering role within the North American industry when it comes to complying with the U.S. emissions standard EPA 2010. DTNA is the leading supplier of EPA 2010-compliant Class 8 heavy-duty trucks. - Detroit Diesel plant Redford in the State of Michigan, USA