These new vehicles with all thier sensors are such a waste of time, I'm glad I stuck with my 22 year old Mercedes Sprinter T1N 2.7 camper. never had a Nox sensor, DPF CAT or EGR problem, because it does not have one. Anyway good luck and safe travels These models suffer from the rain getting into the engine bay from the the window tray area. keep an eye out for that it can damage the ECU.