This Mercedes-Benz Vito had an active AdBlue/SCR warning, with 53 km remaining before the engine-start restriction. The video explains that SCR operation involves NOx sensors, a dosing injector, control electronics and an AdBlue tank with a pump and level sensor. A fault in one of these components can trigger a warning and a remaining-distance countdown.

Diagnostics identified a fault associated with the NOx system. The video then describes a plan to read the Bosch EDC17C66 software through OBD, make changes and write the file back. It does not show that this work was completed, so no result can be treated as verified.

The vehicle also already had an elevated particulate reading and DPF problems. The workshop planned to assess the filter separately after addressing the AdBlue issue and decide whether it could be restored or needed replacement. The video does not confirm a DPF repair or a roadworthiness inspection result.