Mercedes-Benz Air Flow Sensor 0280217114 0000940948 Precise Intake Air Measurement

The Mercedes air flow sensor (027-021-7114/0000940948) is installed between the intake manifold and air filter, accurately measures the amount of air entering the engine and transmits data to the ECU to optimize fuel injection and ignition timing. Suitable for many Mercedes models including C-Class, E-Class, and S-Class. If idle is unstable, acceleration is weak, or fuel consumption is abnormal, sensor failure is indicated and replacement is needed. Installation difficulty moderate; professional installation and intake tract cleaning recommended.