The laws for adhering to exhaust emissions during real-life driving (RDE = Real Driving Emissions) affect the entire engine development process. Our many years of experience in application, engine and drivetrain development help us provide our customers with optimum support regarding RDE. Depending on the problem, RDE investigations can be conducted on the dynamic engine test bench, on the roller dynamometer or in real-life road traffic. In the same way, the simulation can be used to evaluate different engine concepts under RDE boundary conditions very early on.