Mercedes W211 Mass Air Flow Meter Sensor A2730940748

Mercedes W211 Mass Air Flow Meter Sensor is a precision sensor from the Air and fuel intake sensors group, designed for gasoline engines of this series. It is responsible for the accurate measurement of the intake air volume, which allows the engine control unit to properly dose fuel and ensures stable, predictable engine operation.

Specifications and technical data

• SKU: A2730940748
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2730940748
• Substitutable numbers: A2730940748, A 273 094 07 48, 0280218173, 0 280 218 173
• Fuel type: Petrol
• Category: Air Intake & Fuel Sensors

Function and importance of the mass air flow meter in the Mercedes W211

The mass air flow meter in the Mercedes W211 is a key component of the gasoline engine fuel system. Based on the signal from this sensor, the controller calculates the fuel dose, adjusts the ignition timing, and manages the operation of other components, which translates into smooth idling, seamless acceleration, and predictable throttle response.

A well-chosen and functional mass air flow meter helps maintain:

• stable engine speed under various load conditions,
• the correct air-fuel mixture,
• lower fuel consumption while maintaining dynamics,
• reduced exhaust emissions, in accordance with the manufacturer's specifications.

Compatibility and selection by part numbers

The offered mass air flow meter is a component designed for gasoline fuel systems in Mercedes vehicles. Thanks to the assigned OEM part numbers and interchangeable numbers, it is possible to precisely verify compatibility with a specific engine version and vehicle year. Selection by part number minimizes the risk of installing an incorrect sensor and eliminates engine performance issues after replacement.

In case of doubt, it is worth comparing the markings with the existing component or using the VIN-based selection to ensure that the mass air flow meter will work correctly with the vehicle's electronics.

Performance characteristics and benefits of use

The mass air flow meter used in the Mercedes W211 has been designed for stable operation across a wide range of temperatures and loads typical for gasoline engines. The sensor's design enables precise reading of the air flow, which is particularly important during dynamic driving and in urban conditions, where frequent changes in engine load require a rapid response from the control system.

Using a functional mass air flow meter helps reduce typical symptoms of wear or damage to the old component, such as power loss, jerking during acceleration, or increased fuel consumption. It is a practical solution for users who want to restore proper engine performance without investing in expensive new components.

Condition, origin, and installation aspects

The offered component comes from dismantling and is sold as a used part, which represents a favorable compromise between cost and functionality. The mass air flow meter is intended for installation in place of the factory sensor, using the existing electrical harness and intake ducts, so the replacement is usually limited to basic service procedures.

Before installation, it is recommended to perform a standard check of the electrical socket, seals, and intake ducts to avoid leaks and measurement interference. A correctly installed mass air flow meter works with the factory engine control software without the need for additional modifications.

Technical support and further information on used electronics

In the case of sensors and modules from the secondary market, correct part identification, hardware compatibility, and proper installation are particularly important. These issues are discussed in more detail in the Global Parts guide – Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?, where you will find practical tips on selection by part numbers, compatibility, and the operation of such components.

If you are planning a comprehensive repair or upgrade of the intake and fuel system area in your Mercedes and need other elements from the same group, such as additional flow sensors, air measurement elements, or components related to fuel dosing, check the available parts in the Mercedes air and fuel intake sensors category.