Mercedes C118 W177 W247 OM654 Air Flow Sensor Mass Meter Sensor A6549052300

Mercedes C118 W177 W247 OM654 Air Flow Sensor Mass Meter Sensor from the Air and fuel intake sensors group is a precision intake system component responsible for the accurate measurement of intake air mass in modern diesel engines. A properly selected and functional sensor allows the engine control unit to dose fuel correctly, ensure stable idling, and reduce fuel consumption and exhaust emissions.

Specifications and technical data

• SKU: A6549052300-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6549052300
• Substitutable numbers: A6549052300, A 654 905 23 00
• Fuel type: Diesel
• Category: Air Intake & Fuel Sensors

Purpose and function in the intake system

The offered item is a mass air flow sensor designed for modern Mercedes diesel engines, used in models such as the C118, W177, and W247. Its task is to continuously measure the amount of air drawn into the engine, which enables precise control of fuel dosage, turbocharger operation, and the exhaust gas recirculation system.

In practice, a functional air flow sensor translates into:

• stable idle speed and smooth acceleration,
• better throttle response across the entire rev range,
• reduced smoke and lower particulate emissions,
• more predictable fuel consumption in daily operation.

Benefits of using an original Mercedes sensor

In diesel systems, air mass measurement accuracy is crucial for the durability of injectors, the turbocharger, and the diesel particulate filter (DPF). Using an original sensor from the Mercedes group reduces the risk of adaptation errors, erratic readings, and cold-start issues. The component is factory-calibrated to the characteristics of the brand's diesel engines, which facilitates diagnostics and compatibility with the factory engine control unit software.

The product comes from the used OEM parts segment, making it a reasonable compromise between repair costs and maintaining the factory performance parameters of the engine. This is a particularly beneficial solution for professional repairs where compliance with service documentation and predictable long-term performance are essential.

Integration with the diesel fuel system

In diesel engines, the air flow sensor works directly with the injection system, controlling parameters such as fuel dosage, boost pressure, and DPF regeneration strategies. Incorrect readings from this component can lead to excessive injector load, increased fuel consumption, and engine control unit error codes.

To better understand the relationship between the air flow sensor, injectors, and high-pressure pump, it is worth checking the technical guide Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which covers diagnostics, selection by part numbers, and operating principles for diesel systems.

Application in service practice

Replacing the air flow sensor is a standard service procedure for symptoms such as power loss, increased smoke, unstable idle, or errors related to the air-fuel mixture. In many cases, installing a functional unit restores proper engine performance without the need to interfere with more expensive components.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other items from the same group, such as additional boost pressure sensors, air temperature measurement elements, or components controlling the mixture composition, check the available parts in the Mercedes air and fuel intake sensors category.

Summary

Mercedes C118 W177 W247 OM654 Air Flow Sensor Mass Meter Sensor is a technically matched intake system component that supports proper engine operation, reduces the risk of control unit errors, and helps maintain stable combustion parameters. Choosing an original component from the Mercedes group is a safe solution for users who expect predictable performance, seamless integration with factory electronics, and efficient fuel system operation in daily use.