Mercedes W203 W211 CLS W219 M272 Air Flow Mass Meter Sensor A2730940848

Mercedes W203 W211 CLS W219 M272 Air Flow Mass Meter Sensor is a component from the Air and fuel intake sensors group, responsible for the precise measurement of intake air volume in M272 series gasoline engines. A properly selected mass air flow sensor ensures stable engine operation, the correct fuel mixture, and smooth idling. By choosing this model, you are opting for a component structurally matched to the Mercedes intake system.

Specifications and technical data

• SKU: A2730940848
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2730940848
• Substitutable numbers: A2730940848, A 273 094 08 48, 0280218180, 0 280 218 180, KD
• Category: Air Intake & Fuel Sensors

Purpose and role in the intake system

The mass air flow sensor in the M272 engine is responsible for the continuous measurement of the air mass drawn through the intake manifold, which is crucial for the engine control unit's operation. Based on the sensor signal, the control unit determines the fuel dosage, ignition timing, and auxiliary equipment operating strategy. A functional component from this group reduces the risk of power loss, increased fuel consumption, or unstable idle speed.

For Mercedes C-Class W203 and E-Class W211 models with the M272 unit, using the correct mass air flow sensor allows for maintaining factory engine performance parameters without the need for ECU map modifications or additional adaptations.

Benefits of using an original sensor

The original mass air flow sensor from the Air and fuel intake sensors group ensures compatibility with the factory control software and correct signal interpretation by the ECU. As a result:

• the control unit receives a stable, repeatable measurement signal,
• the air-fuel mixture is maintained within the optimal range,
• the risk of triggering error lights related to the intake system is reduced,
• the engine maintains a predictable throttle response.

Choosing a used, fully functional component allows for reducing repair costs while maintaining the correct operating parameters of the injection system.

Selection by part numbers and compatibility

This mass air flow sensor model is assigned to a specific manufacturer reference and has interchangeable numbers, which facilitates verifying compatibility with a given vehicle. When selecting, it is recommended to compare the markings with the existing component or verify via the VIN number in the Mercedes catalog to avoid installation and communication issues with the engine control unit.

To better understand how to safely choose used modules and sensors, including intake components, it is worth reading the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. You will find practical tips there regarding OEM number selection, compatibility, and installation.

Application in service practice

Replacing the mass air flow sensor in the M272 engine is a typical service operation performed when symptoms such as uneven idling, loss of dynamics, or increased fuel consumption occur. Using the correct sensor often allows for restoring proper operating parameters without the need for deeper intervention in the fuel or ignition system.

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

Summary

Mercedes W203 W211 CLS W219 M272 Air Flow Mass Meter Sensor is a technically matched intake system component designed to work with M272 series gasoline engines. Proper selection of this sensor allows for maintaining stable engine operation, optimizing fuel consumption, and limiting mixture-related errors. It is a sensible solution for users who want to restore correct engine performance using an original component in a cost-effective, used specification.