But what actually happens in the software when the car is on the test bench and then switches to a cleaner version? Is it really so easy that an electrical contact gives the impulse for the changed settings on the test bench by opening the bonnet? Is the bonnet open at all on the test bench? Or does the connection of a plug to the OBD socket trigger these changes? What happens then with privately connected OBD systems, which can even be connected in driving mode? How are the better values achieved? Is simply a lean mixture or another injection time point set and a different injection time set? Thus, the performance would be reduced in any case. But how dangerous would such an adjustment in continuous operation be with regard to the durability of the engine? In addition, a provocative excitation for (software) tuners: Easy in test bench mode for the AU for example, maintain the serial values and as soon as the test stand mocus is finished, switch to maximum power with actually completely inadmissible exhaust values.