3.0 TDI clean diesel
The 3.0 TDI clean diesel with the ultra low emission system marked a further milestone for Audi: The V6 unit’s pollutant emissions were so low that it complied with all US emission standards as well as the Euro 6 limits, which did not come into force until years later. The Common Rail fuel injection and exhaust gas recirculation systems were extensively redesigned. Together with innovative combustion chamber sensors, they ensured highly efficient combustion. A separate DeNox catalytic converter in the exhaust system additionally eliminated most of the nitrogen oxides thanks to the injected additive AdBlue. The clean V6 was launched with power output of 176 kW (240 hp) and developing 550 Nm (405.66 lb ft) of torque.