In newer vehicles (Euro 6), voltage-controlled simulation of the D+ signal is often no longer possible due to the energy-optimised alternator controls. The VOTRONIC D+ Simulator PRO works independently of the alternator’s charging mode, as it generates the signal by recognising the vibrations of the running engine. It is therefore suitable for all vehicle types of all model years. To bridge start-stop phases (e.g. at traffic lights) or during stop-and-go (e.g. in traffic jams), the device has an adjustable switch-off delay. In addition, a built-in charging voltage monitor prevents unintentional activation in the event of external vibrations, e.g. during ferry journeys.