This listing is for Mercedes Benz OEM M642 diesel servo motor for intake manifold to Suit the following vehicles W164 ML GL W166 ML GL W204 C Class W212 E Class

A manifold actuator in a car is a component that helps control the flow of air entering the engine's intake manifold. It is typically connected to the intake manifold and is operated by an electronic or vacuum-controlled mechanism. The primary function of the manifold actuator is to regulate the length and volume of the intake manifold, optimizing the engine's performance at different RPM ranges.

By adjusting the length and volume of the intake manifold, the manifold actuator helps improve engine efficiency and power output. At lower RPMs, the actuator narrows the intake manifold, increasing the air velocity and promoting better cylinder filling for improved torque. At higher RPMs, the actuator opens up the intake manifold, allowing for increased airflow and better top-end power. This dynamic adjustment of the intake manifold helps achieve a balance between low-end torque and high-end power, providing optimal performance across the engine's operating range.