Power Relay Control Mercedes W176 W246 Module 4 Pin 12V 20A SET A0035423019

The Mercedes W176 W246 4-Pin 12V 20A Power Relay Kit A0035423019 is an original component from the Relays group, designed for installation in Mercedes vehicles of the W176 and W246 series. Thanks to its factory design and 12V compatibility, it ensures stable control of circuits with loads up to 20A, translating to seamless operation of key electrical systems in the car.

Specifications and technical data

• SKU: A0035423019-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0035423019
• Substitutable numbers: A0035423019, A 003 542 30 19
• Category: Relays

Purpose and Function of the Power Relay

The presented 4-pin 12V 20A power relay is designed as an actuator in the electrical system of compact Mercedes vehicles. It is responsible for reliably switching circuits with medium current loads on and off, such as selected comfort modules, auxiliary systems, or specific aftermarket equipment receivers. Using an original relay helps maintain proper system operating parameters and reduces the risk of voltage drops and contact overheating.

4-Pin Construction and 12V / 20A Operating Parameters

The 4-pin configuration provides a simple, clear connection diagram, facilitating diagnostics and potential replacement in the engine bay or fuse box. The relay is adapted for standard 12V onboard voltage, and its 20A load capacity allows it to handle demanding receivers without excessively burdening the system. This combination of parameters makes it an effective stable connector between control and receiver power supply.

Compatibility with Mercedes W176 and W246

The 4-pin 12V 20A Power Relay is designed to work with the electrical systems of Mercedes W176 (A-Class) and W246 (B-Class) models, ensuring full compatibility with factory sockets and wiring harnesses. This means it can be installed in place of the original component without the need for modifications, soldering, or adapters. Using OEM parts maintains electrical parameter consistency with the vehicle manufacturer's specifications, which is particularly important in modern electronically controlled systems.

Condition, Origin, and Benefits of Using OEM

The offered relay is from the original Mercedes component line and is a used part, allowing for economical replacement while maintaining factory specifications. Compared to low-cost aftermarket alternatives, using an original relay reduces the risk of system malfunctions, communication interference between modules, and premature contact wear. It's a practical solution for workshops and owners who want to restore correct electrical system operation without altering its design.

Assistance with Selection and Additional Information

When selecting the correct power relay for a specific vehicle equipment version, it's advisable to consult service documentation or consult an automotive electrician, especially for complex system configurations. If necessary, comparing the pin layout and markings on the housing with the currently installed component can also help confirm compatibility.

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

To better understand how the quick availability of used OEM parts affects vehicle downtime and repair costs, it's worth reading the article Immediate Availability of Car Parts and Repair Time – How Used OEM Shortens Workshop Stays?, which discusses the practical benefits of using original components from the aftermarket.