Mercedes R Klasse active air flap fault

I own an R Klasse, and I had similar symptoms. I got the check engine light and noticed the car running hotter. Did you check the fault code to confirm it's related to the air flaps?

Yes, the fault code indicates an issue with the active air flap. I suspect the electromechanism is failing. Was this your experience, and did it point to a faulty electromechanism, or was it something else?

Yes, the fault code pointed to the same electromechanism. I would recommend taking it to a workshop. They ran tests and confirmed the diagnosis. It sounds like you are on the right track.

Thanks for the confirmation. I had the electromechanism replaced which cost 590€. The check engine light is now off, and the overheating issue has been resolved.