This 2016 Mercedes-Benz C 220 BlueTEC with a 2.1-litre diesel engine arrived with issues related to the SCR/AdBlue system, DPF and exhaust temperature sensors. The owner had visited a dealer, but the proposed repair was expensive.

Changes were made to the engine control unit software relating to the DPF, SCR/AdBlue system and its sensors. After the work, the engine ran without limp mode or warning lights. During the check it revved above 3,000 rpm, and no visible smoke was seen at idle.

The vehicle was not measured on a dynamometer, so no specific power gain is stated. The video shows the engine running in the workshop without the original warnings after programming.