Mercedes W205 W207 W213 Engine Oil Separator Hose Pipe Petrol A2700104203

Mercedes W205 W207 W213 Engine Oil Separator Hose Pipe Petrol is an original crankcase ventilation system component, designed for petrol engines in selected Mercedes C-Class, E-Class, and other series models. The precisely engineered design of the oil separator stabilizes engine operation, reduces blow-by, and helps maintain correct combustion parameters, which translates into smoother engine performance and reduced wear on accessories. This solution is particularly recommended for professional engine repairs where compliance with factory specifications and a secure fit are essential.

Specifications and technical data

• SKU: A2700104203-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2700104203
• Substitutable numbers: A2700104203, A 270 010 42 03
• Fuel type: Petrol
• Part type: Oil Cooler Hose
• Category: Engine Oil Coolers & Lines

Function and role of the breather in a Mercedes petrol engine

The oil separator in the breather system is responsible for the controlled discharge of gases from the crankcase and the separation of oil mist before it returns to the intake. In Mercedes petrol engines, this is crucial for:

• maintaining stable crankcase pressure,
• limiting excessive oil consumption,
• reducing carbon deposit buildup in the intake manifold and on valves,
• maintaining smooth engine operation across the entire RPM range. A properly selected oil separator in the breather system helps keep the intake system clean, which in the long run supports engine performance and durability.

Compatibility with Mercedes W205, W207, W213 models

The presented breather has been designed for specific body versions of the Mercedes C-Class, E-Class, and related series equipped with petrol engines. As a result, the user receives a component structurally matched to the specific vehicle generation, which facilitates installation and minimizes the risk of leaks in the engine area. The original Mercedes origin ensures that factory engineering standards are met, including properly selected channel cross-sections, valves, and separation chambers, which directly affects the correct operation of the ventilation system.

Technical category: Oil coolers and lines

Although the breather with an oil separator primarily functions to vent the crankcase, it is connected to the engine oil circuit and its return to the lubrication system. For this reason, the product has been assigned to the Oil coolers and lines category, which includes components that interact with engine oil and its flow within the power unit. Replacing the oil separator is particularly recommended when symptoms such as unstable idle speed, increased oil consumption, leaks around the valve cover, or excessive exhaust smoke occur. In such situations, installing a functional component from this group helps restore proper engine operating conditions.

Characteristics of the used OEM component

The offered breather with an oil separator is a used original component, sourced from dismantling. This type of part is an attractive alternative to new replacements, especially when prioritizing factory design and cost savings. Original Mercedes components are designed for long-term operation, so if in good technical condition, they can continue to perform their function effectively. Before installation, a standard visual inspection of sockets, connectors, and seals is recommended, as well as verifying system tightness after installation to ensure proper interaction with other engine area components.

Operational tips and related components

When replacing the breather with an oil separator, it is worth paying attention to:

• the condition of vacuum lines and oil lines near the valve cover,
• the cleanliness of intake channels and any oil-carbon deposits,
• the tightness of connections with the intake system and air filter housing. This approach allows for a comprehensive repair and reduces the risk of the problem returning in the short term. For users interested in a broader perspective on issues related to oil circulation and engine operating temperature, the guide on the impact of high temperatures on the cooling system and the selection of used components may be useful – you can find it in the article Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as oil lines, oil cooling elements, or additional components interacting with the lubrication system, check the available parts in the Mercedes Oil coolers and lines category.