Mercedes W204 C207 W211 W212 Engine Breather Hose Cap A2720100531

Mercedes W204 C207 W211 W212 Engine Breather Hose Cap is an original crankcase ventilation system component designed for engines used in popular Mercedes C-Class, E-Class, and coupe models. The cap belongs to the Lines, hoses, and pipes group, working in conjunction with breather hoses to ensure stable engine gas routing. It is a practical solution for users looking to restore proper ventilation system operation while maintaining the factory design.

Specifications and technical data

• SKU: A2720100531
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2720100531
• Substitutable numbers: A2720100531, A 272 010 05 31
• Part type: Hose
• Category: Hoses, Lines & Pipes

Function and application of the engine breather hose cap

The engine breather hose cap is responsible for tightly sealing a section of the ventilation system and properly routing gases from the crankcase to the intake system. When combined with breather hoses and lines, it stabilizes pressure inside the engine, which promotes smooth engine operation and prevents oil vapors from escaping into uncontrolled areas. This component is dedicated to selected Mercedes W204, C207, W211, and W212 series models, ensuring it maintains factory geometry and mounting methods. Using an original cap helps avoid fitment issues that often arise with imprecise aftermarket replacements.

Construction and integration with the Lines, hoses, and pipes system

The cap is designed as a part that works with elements from the Lines, hoses, and pipes group, creating a cohesive engine gas discharge system. Properly shaped connectors and mating surfaces allow for a tight connection with breather hoses, minimizing the risk of leaks and oil vapor seepage. The factory design ensures:

• proper gas flow routing within the breather system,
• stable mounting to the engine unit,
• compatibility with original hoses and lines used in the given engine generation.

Benefits of using an original breather hose cap

Using an original cap to replace a worn or damaged part helps restore correct ventilation system operating conditions. This is particularly important in engines where improper breather operation can lead to unstable idle, increased oil consumption, or contamination of the intake system. Key advantages include:

• factory fitment for engines used in W204, C207, W211, and W212 models,
• consistency with original breather hoses and lines,
• maintenance of a design consistent with the vehicle manufacturer's specifications.

Product characteristics and condition

The offered engine breather hose cap is a component sourced from a Mercedes vehicle. The product is used, which allows for economical repair while maintaining original design specifications. This is a particularly attractive solution for users who prefer OEM parts over uncertain replacements. Choosing an original, used breather cap is often beneficial from the perspective of future vehicle resale. Owners who want to better understand the impact of using original components on vehicle value can read the article Original used parts vs. resale value – how not to lose money?.

Complementary breather and hose system components

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 breather hoses, flexible hoses, or rigid pipes for routing operating media, check out the available parts in the Mercedes lines, hoses, and pipes category.