V Klasse Diesel ECU Problems

I had similar symptoms with my V Klasse. Error codes pointed to the engine control unit. Have you done any car diagnostics or tried a system reset? ECU problems can be tricky.

Yes, car diagnostics confirmed the ECU issue and the error is stored. Did replacing the relay fix your engine control?

My issue was more complex than just the relay. It required ECU repair at a workshop with specialized tools. Given your symptoms and the error code, I recommend consulting a professional.

Thanks for the insight. As suspected, main relay was defective. Replacement done. Total cost: 120€. Now the engine control works as expected.