Mercedes W177 W247 Vacuum Container Sensor Filter Solenoid Valve A0009979402

Mercedes W177 W247 Vacuum Container Sensor Filter Solenoid Valve is a vacuum system component designed for Mercedes compact class models, engineered to work with the Vacuum pumps assembly. It is responsible for the precise delivery of vacuum to the control valve, which translates into stable operation of related engine components and accessories. This is a solution for users who expect proven, factory-spec hose geometry and reliable vacuum system performance.

Specifications and technical data

• SKU: A0009979402-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009979402
• Substitutable numbers: A0009979402, A 000 997 94 02
• Category: Vacuum Pumps

Purpose and function in the vacuum system

The vacuum valve hoses in Mercedes W177 and W247 models work in direct conjunction with the vacuum pump assembly, responsible for transporting vacuum to the actuators. A properly selected set of hoses ensures:

• stable operating pressure in the vacuum system,
• consistent operation of the control valve,
• proper cooperation with vacuum-dependent engine accessories.

By maintaining the original routing and hose diameters, the system operates under conditions close to factory specifications, which reduces the risk of leaks and performance drops.

Benefits of using an original Mercedes component

The offered item comes from the Mercedes brand, which means maintaining factory flow characteristics and compatibility with the vacuum pump system in the given model range. In practice, this translates into:

• secure fitment to mounts and hose routing in the engine bay,
• maintenance of the proper rigidity and flexibility of vacuum hoses,
• reduction of the risk of ECU errors resulting from incorrect vacuum pressure.

This is a particularly beneficial solution when diagnosing vacuum system issues, where replacing hoses and the valve is one of the key steps in restoring proper system operation.

Product characteristics and service application

The vacuum valve hoses in this offer are a component from the Vacuum pumps category, designed to operate in the demanding environment of the engine bay. They are suitable both for typical maintenance replacements and for more extensive vacuum system repairs, where it is necessary to restore airtightness and proper component control.

The product is suitable for workshops specializing in the Mercedes brand as well as individual users who want to recreate the factory hose configuration without using replacements with uncertain geometry. The used nature of the part allows for an economical repair while maintaining the original design.

Diagnostics, selection, and operation

When dealing with vacuum system problems – such as unstable operation of vacuum-controlled components, errors stored in the ECU, or performance drops – replacing the vacuum valve hoses is one of the basic service steps. Proper selection of the component according to the manufacturer's markings facilitates matching it to the specific engine and accessory configuration.

To better understand the relationships between power supply and control elements in modern power units, it is worth checking out the guide material regarding the fuel system, selecting parts by manufacturer markings, and regeneration principles – you can find it in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. It helps organize knowledge about the cooperation of individual components and facilitates repair planning.

Expanding work within the Mercedes vacuum system

If you are planning a comprehensive repair or upgrade of the vacuum system area in your Mercedes and need other elements from the same group, such as additional hoses, connectors, or components working with the vacuum pump, check out the available parts in the Mercedes Vacuum pumps category.