Mercedes S Klasse diesel engine control unit problem

I had a similar issue with my older Saab The control system was throwing codes and limiting power Have you checked all the wiring and connections to the ECU Sometimes a loose or corroded connection can mimic a more serious ECU problem Before committing to ECU repair, it might be worth a thorough check of the basics

Thanks I will examine the connections Did your Saab exhibit the same error memory symptoms Was a system reset effective in your case, or did you require more extensive ECU repair

The Saab did indeed show error codes A system reset only provided temporary relief The issue returned after a short period Ultimately, I had to take it to a workshop for a proper car diagnostics evaluation and ECU repair Considering your Mercedes' symptoms and the stored error, a professional evaluation might be prudent

I appreciate your advice Based on your experience, I have decided to consult a workshop Indeed, the defective main relay was the cause Repair costs amounted to 120€ Your insights were valuable in guiding my decision-making process