The Mercedes-Benz Genuine Pressure Control Valve with Breather Pipe, part number 6420101791, is a component related to the engine’s crankcase ventilation system. This system plays a crucial role in managing the pressure inside the engine’s crankcase and helps control emissions. Here are some key features and functions of this part:

Crankcase Ventilation: The pressure control valve is part of the crankcase ventilation system, also known as the Positive Crankcase Ventilation (PCV) system. It allows the engine to vent harmful gases and excess pressure from the crankcase to the intake manifold, where they can be burned during combustion.

Breather Pipe: The inclusion of a breather pipe suggests that this component is involved in the circulation and venting of gases within the engine. The breather pipe is an essential part of the ventilation system, allowing gases to escape while preventing the entry of contaminants.

Emission Control: The PCV system is crucial for controlling emissions from the engine. It helps reduce the release of harmful pollutants into the atmosphere and ensures compliance with environmental regulations.

Genuine OEM Part: As a “Mercedes-Benz Genuine” part, this component is an Original Equipment Manufacturer part designed to meet the specific standards and requirements set by Mercedes-Benz. Using genuine OEM parts helps ensure compatibility and performance consistent with the original design.

Quality Materials: The pressure control valve is constructed from high-quality materials to withstand the conditions within the engine compartment. This ensures durability and long-lasting performance.