The air flow sensor (AFS) is a component in the engine management system of a Mercedes-Benz vehicle. It is used to measure the amount and temperature of the air entering the engine. It is typically located in the air intake system, near the throttle body or the air filter.

The AFS works by measuring the amount of air that enters the engine, which is used by the engine control module (ECM) to calculate the proper fuel injection and ignition timing for the engine. It uses a hot wire or a hot film element to measure the airflow, which is then converted into a voltage signal that is sent to the ECM. The ECM uses this signal to adjust the fuel-air mixture and ignition timing for optimal engine performance and efficiency.

In Mercedes-Benz vehicles, the AFS is typically designed to be durable and long-lasting, able to withstand the high temperatures and pressures of the engine operation. They are also designed to be precision-machined to ensure accurate airflow measurement and proper function of the engine management system. The AFS should be inspected regularly and replaced if it shows signs of wear or damage to ensure proper engine function and prevent potential engine damage. A malfunctioning AFS can cause issues such as poor fuel economy, poor engine performance, or even engine stalling.


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