Mercedes W205 C238 M264 E20 LL Engine Breather Valve Oil Separator A2640100200

The Mercedes C238 M264 E20 LL Oil Separator Crankcase Ventilation is a specialized crankcase ventilation system component designed for Mercedes M264 engines. It is responsible for separating oil mist from crankcase gases, which promotes stable engine operation and reduces intake contamination. A well-chosen oil separator helps maintain engine pressure balance and supports long-term, predictable engine performance.

Specifications and technical data

• SKU: A2640100200
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2640100200
• Substitutable numbers: A2640100200, A 264 010 02 00
• Category: Vacuum Pumps

Function and Role of the Crankcase Ventilation System – Oil Separator in M264 Engines

The crankcase ventilation system with an oil separator in M264 engines is responsible for the controlled discharge of gases from the crankcase and their reintroduction into the intake system after oil particles have been separated. This:

• reduces the amount of oil entering the intake and combustion chamber,
• limits carbon deposit formation in intake channels and on valves,
• maintains more stable operation of the crankcase ventilation system,
• ensures the engine retains predictable operating parameters across a wider range of loads.

For modern engines like the M264, a functional oil separator is crucial for maintaining proper combustion characteristics and the correct operation of engine control systems.

Construction and Application in Mercedes Vehicles

The crankcase ventilation system – oil separator used in C238 models with M264 E20 LL engines is designed to work in conjunction with the precise control system of the Mercedes powertrain. Its tasks include:

• ensuring appropriate gas flow in the ventilation system,
• separating oil under conditions of variable load and rotational speed,
• limiting oil loss while maintaining required emission parameters.

Properly matching the crankcase ventilation system to the specific engine and body style helps maintain the integrity of the entire system, which is particularly important in modern Mercedes designs.

Component Condition and Installation Aspects

The offered oil separator is a component from the Vacuum Pumps category, sourced from disassembly, which allows for an economical replacement compared to brand-new parts. Before installation, standard workshop verification is recommended, including checks for leaks, channel clarity, and the correct operation of internal valves, in accordance with the service procedures for the specific engine.

When selecting and installing, pay attention to:

• compatibility with the M264 E20 LL engine,
• correct connection of crankcase ventilation hoses and any vacuum ports,
• the use of new seals and mounting elements recommended by the vehicle manufacturer.

Benefits of Using an Original Mercedes Component

Using an original crankcase ventilation system – oil separator dedicated to the M264 engine in the C238 body preserves the structural integrity of the entire system. An original component:

• is designed for the specific gas flow characteristics of the given engine,
• works with the factory engine control system,
• reduces the risk of incorrect ventilation system operation and associated diagnostic errors.

For users and workshops, this means more predictable installation and easier diagnostics during subsequent inspections.

Selection by Part Numbers and Technical Support

When selecting a crankcase ventilation system – oil separator for a specific Mercedes vehicle, it is advisable to use manufacturer markings and service documentation to ensure full compatibility with the engine and vehicle year. If in doubt, comparing the component's design with the part removed from the car and verifying in manufacturer catalogs can be helpful.

To better understand the relationships between individual engine components and the fuel system, it is recommended to consult the guide on diagnostics and part selection by manufacturer markings – this is thoroughly discussed in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair, which also covers the identification of parts by OEM numbers.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional vacuum modules, control valves, or parts that work with the ventilation system, check the available parts in the Mercedes Vacuum Pumps category.