Mercedes V177 Breath Vent Hose Line Pipe A6540100212

The Mercedes V177 Crankcase Ventilation Hose is an original crankcase ventilation system component from the Hoses, Tubes, and Pipes group, designed for use in Mercedes vehicles. It's a practical solution for users who want to restore proper engine vapor drainage, maintaining the original performance characteristics of the powertrain.

Specifications and technical data

• SKU: A6540100212
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6540100212
• Substitutable numbers: A6540100212, A 654 010 02 12
• Category: Hoses, Lines & Pipes

Function and Application of the Crankcase Ventilation Hose

The Crankcase Ventilation Hose is responsible for the controlled drainage of oil vapors and gases from the crankcase into the intake system. A properly functioning hose helps maintain stable engine pressure, reduces the risk of leaks, and supports smooth powertrain operation.

A correctly selected hose from this component group contributes to:

• maintaining the airtightness of the crankcase ventilation and intake systems,
• reducing contamination of the intake manifold with oil vapors,
• stable engine operation across the full load range,
• more predictable powertrain behavior in the long term.

Construction and Characteristics of the Component

The hose belongs to the Hoses, Tubes, and Pipes group, meaning it is designed to operate in environments with variable temperatures and contact with oil vapors. Its construction is adapted to the factory routing of hoses in Mercedes vehicles, which facilitates installation and minimizes the risk of stress or leaks after fitting.

As an original Mercedes part, the hose maintains the geometry and connection diameters consistent with the factory design, promoting proper gas flow and correct interaction with other components of the crankcase ventilation system.

Condition, Selection, and Installation

The offered hose is in used condition, making it a sensible choice for users seeking an economical yet original-compliant service solution. Before installation, a standard visual inspection is recommended to check for any signs of operational wear, typical for components working in the engine bay.

To select the correct hose for a specific body version and engine, it is advisable to verify compatibility with the OEM part number and interchangeable numbers in the product's technical specifications. This selection method reduces the risk of error and speeds up the service process.

Benefits of Using an Original Mercedes Hose

Using the original crankcase ventilation hose in the Mercedes V177 allows for consistency with the vehicle's factory construction. This solution is particularly beneficial for drivers who:

• want to maintain engine performance parameters as close to factory as possible,
• prefer components originating from the same design line as other system components,
• seek parts with known flow characteristics and mounting fit.

As a result, the hose can be used for both standard service replacements and for restoring the crankcase ventilation system's functionality in vehicles subjected to intensive use or with higher mileage.

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 vacuum hoses, breather hoses, or fluid supply pipes, check the available parts in the Mercedes Hoses, Tubes, and Pipes category.

Who is this Product For and How to Use It

The Mercedes V177 Crankcase Ventilation Hose is suitable for workshops specializing in the Mercedes brand as well as for knowledgeable users who service their cars themselves. It can be used for:

• resolving issues with excessive smoke or unstable idle speed,
• servicing the crankcase ventilation system after intake modifications,
• preventive replacement of hoses in vehicles with higher mileage.

For owners of older Mercedes models planning a gradual restoration of their vehicle using used parts, an article describing practical scenarios for modernization and renovation may be helpful: Second Life for a Youngtimer – How Used Car Parts Revitalize Cars from 1998–2012.