Why is the Mercedes-Benz engine oil level system temporarily unable to measure?
3 Answers
Mercedes-Benz engine oil level system temporarily unable to measure the reasons are as follows: Oil sensor damage: The car's oil pressure sensor is an important device to detect the oil pressure of the vehicle engine, the detected data can help control the normal operation of the engine. If damaged, the engine oil level system cannot be measured. Engine control unit failure The engine control unit can keep the engine in the best working condition, the performance of the engine (power, economy, emissions) to achieve the best. If faulty, it will also cause the oil level system to be unable to measure.
I've encountered many Mercedes-Benz owners asking this question. The temporary inability to measure oil level is usually because the car isn't ready. For example, Mercedes design requires the vehicle to be parked on level ground for measurement, as slopes can easily cause errors. Also, the engine needs to warm up before it can accurately read oil levels - insufficient temperature during cold starts affects sensor operation. Oil foaming can also interfere with readings, especially after sudden braking when oil sloshes in the pan, causing the system to refuse measurement thinking there's a problem. When handling this myself, I advise owners to wait 10 minutes after engine operation before retrying the measurement button. If this keeps happening, it might indicate a dirty or faulty oil level sensor requiring 4S店 inspection to prevent long-term oil shortage causing engine wear. Regular sensor cleaning during maintenance can prevent this fault, as delayed repairs may lead to serious issues. In short, don't panic - follow the manual procedures and the system will recover.
As a frequent Mercedes-Benz driver, I find this phenomenon quite common. Most of the time, it's caused by improper operation. For example, if you try to measure the oil level while driving, the Mercedes system only works when the engine is running and the vehicle is stationary. Or if you don't wait for the oil temperature to rise, the instrument panel may not respond to measurements during the cooling period. Occasionally, false alarms from sensors can also trigger this, such as signal interruptions caused by road bumps. Last time I encountered this, I checked the vehicle manual and found that the Mercedes computer requires initialization settings—restarting the engine can resolve minor issues. In the long term, aging or loose installation of the oil level sensor may cause malfunctions. I recommend having a technician calibrate it during bi-annual maintenance to avoid sudden measurement failures affecting driving judgment. Safety first—don't force the car to drive until it's fixed.
