Mercedes G Klasse Overheating Issue

Interesting problem. I had a similar issue on my older BMW 5 series. It turned out to be a faulty mass airflow sensor causing overheating and what felt like a bypass valve problem. Did you check that already? Are you noticing any unusual idling or hesitation during acceleration?

Thank you for your response. The mass airflow sensor was checked and appears normal. Could you elaborate on the specific symptoms you observed in your BMW, particularly any correlation with the vacuum system or fuel efficiency? Perhaps a more detailed comparison might illuminate a potential parallel.

Okay, so the symptoms were rough idling, and a noticeable drop in fuel efficiency. Power loss was also present, especially uphill. Think of it like a domino effect, one thing triggers another. If the sensor is fine, and you're still seeing these issues, I'd advise getting a diagnostic check done by a reputable workshop to rule out any vacuum leaks or other underlying problems.

I appreciate your insights. It prompted a more thorough investigation. The issue was indeed a minor vacuum leak. The bypass valve error was a consequential effect as initially suspected. The repair was covered under warranty, resulting in no cost. Thank you for your assistance.