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This paper will first describe the project FORFAHRT. The aim of FORFAHRT is the identification and analysis of improved low-emission drivetrain structures for integration into a driver assistance system. Part of the assessment during the project will be DI-spark-ignition engines, integrated starter alternator systems as well as different transmission concepts such as CVT-transmissions or automated manual transmissions. The analysis focuses on “conventional” drivetrain components, not on hybrid or electric propulsion. The analysis is done with the sub-microscopic traffic simulation program PELOPS [5], which was developed at the ‘Institut fuer Kraftfahrwesen Aachen’ in co-operation with the BMW AG. PELOPS models the fundamental elements of traffic -namely route, environment, driver and vehicle- with highest accuracy. The second part of the paper gives first results of the project work.