Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue SET X2 A0035420219

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue SET X2 is a practical set of components from the Relays category, designed for use in the electrical systems of Mercedes vehicles. The set of two units allows for efficient replacement of worn-out components and maintains stable operation of control circuits in the car. The blue housing facilitates quick identification of the relay in the fuse box or electrical module.

Specifications and technical data

• SKU: A0035420219-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0035420219
• Substitutable numbers: A0035420219, A 003 542 02 19
• Color: Blue
• Category: Relays

Technical specifications and application

The presented 5-pin relay with a 12A load capacity is a component designed for operation in the vehicle's low-voltage system, where it is responsible for reliable switching of electrical circuits. The 5-pin design allows it to be used in typical control systems, such as powering selected receivers, controlling auxiliary modules, or performing switching functions in the onboard electrical system.

The blue color of the housing promotes clear organization of the electrical harness – it is easier to distinguish this type of relay from other variants used in the vehicle. The X2 set provides service convenience: one unit can be installed immediately, while the other can be kept as a spare service component.

Compatibility and identification parameters

The relay has been developed for Mercedes vehicles, in particular the W639 and W906 platforms, where it acts as an actuator in the electrical system. Thanks to the use of the original OEM part number and the availability of replacement numbers, selecting the correct component for a specific vehicle configuration is simplified and reduces the risk of errors during service.

Key identification data, such as the OEM designation, reference numbers, and dedicated warehouse markings, are available in the product description, allowing for quick verification of compatibility with your vehicle. For users who value transparency, the clear indication of the Mercedes brand and information about the condition is also important, which facilitates an informed choice of parts.

Condition, functional advantages, and service aspect

The offered relay is in used condition, making it an attractive cost-effective alternative to new components while maintaining the functionality required for daily operation. Using an original element from the same product group allows for maintaining the consistency of electrical parameters with the factory vehicle installation.

The main benefits of using this set include:

• the ability to replace the relay in a manner similar to factory installation,
• maintaining the correct current characteristics in controlled circuits,
• easier diagnostics thanks to the recognizable blue housing,
• availability of two units in one set, which facilitates service planning.

For users who want to further ensure the correct selection of a used component, a guide describing the principles of verifying compatibility and OEM markings may be helpful – detailed tips can be found in the article No more bad purchases! How to professionally choose used car parts.

Support for electrical system expansion

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 relays, control modules, or circuit protection elements, check the available parts in the Mercedes Relays category.

Summary

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue SET X2 is a functional set of two relays designed for the electrical systems of Mercedes vehicles. Using an original solution from the Relays category allows you to maintain the stability of control systems while optimizing service costs through the use of proven, used components.