Mercedes W208 R170 Air Flow Mass Meter Sensor Unit Petrol A0000940948

The Mercedes W204 W212 M272 Mass Air Flow Sensor is an original part from the Air and Fuel Intake Sensors group, designed for M272 gasoline engines in Mercedes C-Class W204 and E-Class W212 models. Precise measurement of the mass of inhaled air ensures stable engine operation, correct fuel dosing, and predictable throttle response.

Specifications and technical data

• SKU: A0000940948
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0000940948
• Substitutable numbers: A0000940948, A 000 094 09 48
• Fuel type: Petrol
• Category: Air Intake & Fuel Sensors

Function of the Mass Air Flow Sensor in the M272 Gasoline Engine

In a gasoline engine, the mass air flow sensor is responsible for the accurate measurement of the amount of air drawn into the intake manifold. Based on this signal, the engine control unit determines the fuel dose, ignition timing, and accessory operating strategy, which translates to:

• stable idle speed and smooth acceleration,
• correct fuel-air mixture across the entire load range,
• efficient operation of the ignition system and catalytic converters,
• reduced fuel consumption and exhaust emissions.

In M272 units, using the correct mass air flow sensor is crucial for maintaining the characteristic smooth operation and predictable dynamics of these engines.

Compatibility and Fitment for Mercedes W204 / W212

The offered part is specifically designed to work with the M272 gasoline engine in W204 and W212 body styles, ensuring full compatibility with the factory control unit characteristics. This means:

• the signal from the sensor is correctly interpreted by the ECU without the need for software adaptation,
• the original injection and ignition maps are maintained,
• the risk of diagnostic errors related to incorrect air mass readings is reduced.

The mass air flow sensor belongs to the Air and Fuel Intake Sensors group, so its proper functioning is directly linked to the condition of the intake and fuel systems.

Benefits of Using an Original Air Intake Sensor

Using the correct mass air flow sensor in a Mercedes gasoline engine with an M272 engine helps to mitigate typical symptoms of wear or incorrect sensor selection, such as power loss, jerky acceleration, or increased fuel consumption. A properly selected part ensures:

• stable idle operation without fluctuating RPMs,
• correct response to sudden throttle input,
• better cooperation with oxygen sensors and catalytic converters,
• easier diagnosis of the intake and fuel systems using OBD testers.

For workshops and users, this means fewer comebacks for corrections and faster confirmation of repair effectiveness.

Product Characteristics and Service Application

The offered mass air flow sensor is a Mercedes brand part from the air and fuel intake sensors group, intended for gasoline engines. It is suitable for both standard replacement of a worn sensor and for more extensive service work in the intake and fuel system areas. By maintaining the factory signal characteristics, it is appropriate for:

• clearing errors related to incorrect mixture,
• restoring factory operating parameters after intake modifications,
• comparative diagnostics in cases of complex fuel system faults.

The used condition allows for an economical restoration of system functionality while maintaining the original manufacturer's specifications.

Support for Selection and Related Components

When working on the fuel system, it is advisable to check the condition of the injectors, fuel pump, and tank. Detailed information on the diagnosis and operation of these components can be found in the article: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair. This provides practical knowledge for comprehensive gasoline engine servicing.

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