I possess a Mercedes-Benz GLB 200. A yellow notice unexpectedly arrived a few weeks ago, indicating the need to reduce engine oil, despite the oil having been replenished six months earlier. I drove the automobile to the dealership, and on that day, the notice did not appear. They ultimately performed Service A. A few days later, the notice reappeared. The vehicle was inactive for a week; now it displays a red notice indicating to switch off the engine oil. It occurs sporadically and may not manifest throughout my subsequent journey. The vehicle operates satisfactorily. No unusual sounds, etc. Today, it indicated to add 1 litre at the next filling; nevertheless, two minutes later, the red notice reappeared. The engine warning indicator is not illuminated.
I am arranging the booking. Do you believe it is a sensor-related problem? Thank you very much