In trucks, which one uses adblue systems, you can remove adblue systems with adblue emulator and trucks can work with only diesel. You dont need to add adblue. This progress is very basic. You can active adblue remove emulator as plug and play or installation to canbus line directly. So truck doesn't lost torque when finish AdBlue liquid or there is a fault on NOx sensor.
You can use adblue remove emulator for emulated adblue system to remove sensor faults and make adblue fuel simulation in all heavy duty, passenger cars that have euro 6 motors.
You can cancel your trucks adblue system to save from adblue liquid or clear all fault codes with mercedes euro 6 adblue remove emulator and this process doesn't cause losing torque.