Diesel-powered rail vehicles also require refueling with AdBlue®. The tank interface of diesel locomotives is different from the tank interface for the road vehicle in some important points. FLACO AdBlue filling station have been developed in cooperation with german railway companies.

The rail vehicles are refueled via a dry coupling system. The vehicles are equipped with a standard dry clutch. The shutdown at full tank via a built-in limit switch. Here, the vehicle is coupled via a special GWG plug with the tank system. To operate rail vehicles with multiple power cars without delay, these systems can often be equipped with multiple taps along the track.