Receptacle Housing Mercedes W164 W203 W639 Dashboard Wiring Harness A0025467940

Mercedes W164 W203 W639 Plug Socket Connector is a component from the Cables, Harnesses, and Connectors category, designed for use in the electrical systems of Mercedes vehicles. A used original part allows for the preservation of factory connection logic, which is particularly important when repairing harnesses, modules, and sockets within the onboard electrical system. This is a practical solution for workshops and users who want to restore correct connections without using universal adapters.

Specifications and technical data

• SKU: A0025467940
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0025467940
• Substitutable numbers: A0025467940, A 002 546 79 40
• Category: Wiring Harnesses, Cables & Connectors

Application in Mercedes Electrical Systems

The presented plug / socket connector has been designed as a component of the electrical system in selected Mercedes models, such as W164, W203, or W639. Thanks to the preservation of the original connector geometry and the appropriate pin profile, the part enables the restoration of correct connections in the factory harness without the need for wire modification.

The use of original connectors in vehicles of this brand is particularly important in areas with higher current loads or dense wiring. A properly selected socket connector reduces the risk of:

• contact overheating under prolonged load,
• loss of electrical contact due to looseness or mismatch,
• errors in electronic systems resulting from unstable connections.

Technical Characteristics and Installation

As a component from the Cables, Harnesses, and Connectors group, the plug is adapted for operation in the engine bay or vehicle interior, depending on the specific application in a given model. The connector design allows for installation into the existing harness by properly crimping the wires or transferring the pins from the damaged connector.

When installing, it is worth paying attention to:

• correct routing of wires according to the vehicle's electrical system diagram,
• securing connections against mechanical stress (ties, harness routing),
• checking the connector latches and locks to avoid accidental disconnection.

A properly selected plug allows for maintaining system integrity, which is important for both the correct operation of control units and subsequent computer diagnostics.

Benefits of Using an Original Mercedes Plug

Choosing an original connector for W164, W203, and W639 models translates into a range of practical benefits in the daily operation of the vehicle. The most important include:

• Compatibility with the factory harness – preserving the original shape and pin layout facilitates installation and eliminates the need for adapters.
• Stability of electrical connections – properly fitted contacts reduce voltage drops and interference, which is crucial for the operation of electronic modules.
• Easier diagnostics – using original connectors simplifies working with factory diagrams and service documentation.

A used part allows for economical repair of the electrical system while maintaining parameters close to factory specifications, which is particularly beneficial for complex harnesses where replacing the entire section would be uneconomical.

Selecting the Right Connector and Additional Materials

Before purchasing, it is advisable to compare the shape and pin layout with the existing connector in the vehicle, and to verify compatibility with the technical documentation of the specific model. In case of doubt, comparing connector photos and consulting the electrical system diagram is helpful.

If you are looking for other components from the Cables, Harnesses, and Connectors category dedicated to this brand, check out the Mercedes Cables, Harnesses, and Connectors available in our store to select compatible components for your vehicle.

When working with the electrical system, the braking system is often serviced concurrently. If you are interested in the safe selection of used components for this system, familiarize yourself with the guide Used Braking System: How to Safely Select Discs, Calipers, and ABS?, which contains a practical checklist useful when shopping in a used parts store.