Relay Mercedes W203 W204 W212 W639 W906 4-Pin Grey Hella 12V A0025422619

Relay Mercedes W203 W204 W212 W639 W906 4-Pin Grey Hella 12V is an original component from the Relays category, designed for use in selected Mercedes models. The grey 4-pin relay operating in a 12V system ensures stable control of electrical circuits, which translates into predictable operation of the vehicle's systems. This used OEM component is a sensible choice for drivers looking for factory fitment and proven construction.

Specifications and technical data

• SKU: A0025422619-3
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0025422619
• Substitutable numbers: A0025422619, A 002 542 26 19
• Color: Grey
• Category: Relays

Application and function of the relay

The described relay is an electrical system component responsible for switching circuits using a low-current control signal. In Mercedes vehicles from the W203, W204, W212, W639, and W906 series, it can support various consumers, such as comfort modules, selected lighting systems, or other auxiliary circuits, depending on the specific car configuration.

Thanks to its 4-pin design, the relay provides a simple control and power path, which facilitates diagnostics and potential replacement. Operation in a 12V system complies with the electrical standard used in Mercedes passenger cars and vans, allowing for seamless integration with the factory wiring harness.

Construction, color, and fitment

The grey relay housing facilitates visual identification in the fuse box or relay module, which is useful during service and diagnostics. The color coding used by the manufacturer helps distinguish this type of relay from other variants with different electrical parameters.

Original manufacturing characteristic of the Mercedes brand means maintaining the correct pin geometry, appropriate housing dimensions, and compatibility with factory-installed sockets. As a result, the relay can be installed in place of the existing component without modifying the installation, which reduces the risk of assembly errors.

Benefits of using an original relay

Choosing an original relay for a Mercedes translates into a number of practical advantages:

• factory fitment to sockets and electrical harnesses in Mercedes vehicles from the W203, W204, W212, W639, W906 series,
• consistency of electrical parameters with the vehicle manufacturer's specifications,
• reduction of the risk of improper operation of controlled circuits,
• easier diagnostics in case of electrical system faults.

The used OEM component allows for maintaining the original architecture of the electrical system, which is particularly important in vehicles equipped with advanced electronics. Using relays consistent with the factory design helps maintain the stability of control modules and limits the occurrence of random errors.

Product condition and practical aspects

The relay is offered as a used item, which is an attractive cost-effective solution while maintaining original origin. Such components, when used properly, are characterized by a long service life, which is why reusing a functional relay is often a chosen option for electrical system repairs.

Due to its compact design, installation and removal are efficient – after locating the correct socket, simply carefully pull out the old element and seat the new one, ensuring correct pin alignment. No need for wiring modifications shortens service time and reduces the risk of mechanical damage to the wires.

System expansion and selection of other Mercedes relays

If you are planning a comprehensive repair or upgrade of the electrical system area in your Mercedes and need other elements from the same group, such as additional control relays, light relays, or fan relays, check the available parts in the Mercedes Relays category.

If you are considering whether new replacements or used OEM components are a better choice in your case, it may be helpful to compare the costs and durability described in the article New or used? A comparison of costs and quality of car parts, which discusses the practical differences between these solutions.