Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Black A0035420419

Mercedes W177 W205 W247 W247 4-Pin Black Relay is an original component from the Relays group, designed for use in the electrical systems of Mercedes vehicles. Its compact, black housing and four-pin contact configuration allow for precise control of selected circuits, maintaining the original operating characteristics of the system.

Specifications and technical data

• SKU: A0035420419
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0035420419
• Substitutable numbers: A0035420419, A 003 542 04 19
• Color: Black
• Category: Relays

Technical Characteristics and Application

The 4-pin black relay is an actuator designed for low-voltage vehicle installations. Its four working contacts enable classic load control using the coil circuit and the power circuit, allowing for safe switching of higher current consumers with minimal load on the control circuit.

This type of solution is used, among other things, for powering selected modules, comfort components, or additional equipment, depending on the specific model's configuration. By maintaining the original pin geometry and manufacturing standards, the relay can be plugged into the existing socket without requiring any electrical system modifications.

Construction and Performance Features

The black housing of the relay provides an aesthetically pleasing, neutral appearance and facilitates integration with the factory wiring harness. The 4-pin design promotes clear circuit routing, and the clearly defined contacts allow for unambiguous assignment of functions to individual pins in the wiring diagram.

Key advantages of this type of solution include:

• stable circuit switching while maintaining adequate current reserve,
• ability to operate under typical vehicle operating conditions,
• compact dimensions that facilitate installation in fuse boxes and distribution modules,
• compliance with original Mercedes wiring harnesses.

Benefits of Using an Original Mercedes Relay

Using a relay from the same product line as factory-installed components helps maintain electrical parameter consistency throughout the system. Appropriately selected current and voltage values, as well as coil operating characteristics, reduce the risk of malfunction in controlled consumers.

For the user, this means:

• predictable operation of electrical and electronic systems,
• reduced risk of random failures resulting from improperly selected replacements,
• easier diagnosis of potential problems due to compliance with service documentation.

Component Condition and Installation Aspects

The relay is offered in used condition, allowing for economical replacement while maintaining the original manufacturer's specifications. This type of component is particularly useful for repairing systems where maintaining the original manufacturing standard is required without altering the wiring harness.

Installation involves seating the relay in the appropriate socket within the fuse box or distribution module. Thanks to its four-pin design and compatibility with the Mercedes electrical system, the replacement process is quick and does not require specialized modifications, provided the vehicle manufacturer's recommendations for component selection are followed.

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

For drivers interested in optimizing servicing costs for other brands, including popular Volkswagen models, you can find useful information on the effective use of the used parts market in the article Repairing a Volkswagen on a Budget? Discover How to Save on Original Car Parts.