Mercedes C117 W166 W176 W205 X253 Relay Black Control Unit 4 Pin 12V A0025429319

The Mercedes C117 W166 W176 W205 X253 Black 4-Pin 12V Relay is an original component from the Relays group, designed for installation in selected Mercedes models. Its black housing and four-pin 12V power configuration make it a practical solution for vehicle electrical systems where stable operation and proper fit are crucial.

Specifications and technical data

• SKU: A0025429319
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0025429319
• Substitutable numbers: A0025429319, A 002 542 93 19
• Color: Black
• Category: Relays

Application and Compatibility

The presented relay has been designed for Mercedes cars from the C117, W166, W176, W205, and X253 series, allowing its use in many popular body and equipment configurations. The four-pin connector enables its application in typical control circuits, such as powering selected modules, auxiliary circuits, or comfort equipment elements, in accordance with the manufacturer's factory solutions.

Thanks to its 12V power design, the relay works with the standard electrical system of passenger vehicles, ensuring predictable behavior under typical daily driving conditions.

Construction and Performance Parameters

The black housing of the relay is constructed to provide adequate rigidity and protect internal components from external factors present in the engine bay or inside the vehicle. The Black color facilitates visual matching with factory wiring harnesses and fuse boxes, contributing to a tidy appearance of the installation.

The four connection pins allow for classic use as a switching element in low-current and medium-current circuits, in line with Mercedes' installation designs. This configuration promotes simple installation and reduces the risk of connection errors, provided that the vehicle's factory electrical diagrams are followed.

Operational Characteristics

As a component from the Relays category, the product is responsible for separating control circuits from actuator circuits, which helps protect the vehicle's sensitive electronics. Using an original solution dedicated to specific body series helps to minimize compatibility issues that may arise when using aftermarket parts with uncertain parameters.

The relay is designed to operate in a 12V system, ensuring consistency with other electrical components in Mercedes cars. Maintaining the correct type of relay in a given circuit promotes stable operation of comfort, safety, and control systems, and also facilitates diagnostics in case of potential malfunctions.

Condition and Benefits of Choosing an Original Part

The offered relay is a used part, which in practice means the possibility of an economical replacement while maintaining the original manufacturer's specifications. Choosing such a solution allows for a perfect fit with factory sockets and wiring harnesses without the need for installation modifications, which is important for both durability and operational safety.

Using original relays in Mercedes vehicles helps maintain electrical parameter consistency throughout the system, which can facilitate subsequent computer diagnostics and the interpretation of errors stored in the control units.

Expanding the Electrical System in a Mercedes

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

If you want to better understand when it is worth opting for original used components and how to choose them for popular car models, our guide may be helpful: Best Used Car Parts – A Guide to the Most Popular Original Parts.