Mercedes ML W163 Relay 4-Pin Grey Tyco Set Kit A0025422619

The Mercedes ML W163 4‑Pin Grey Tyco Relay Kit is an original component from the relays group, designed for use in the electrical system of Mercedes vehicles. The grey housing and 4‑pin contact configuration allow for precise integration into specific circuits, ensuring stable operation of electrical systems and facilitating convenient diagnostics and servicing.

Specifications and technical data

• SKU: A0025422619-2
• 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 in the Electrical System

The 4‑pin relay in the Mercedes ML W163 model is responsible for switching higher load circuits using a low-current control signal. This effectively isolates sensitive control elements from the main load, reducing voltage drops and minimizing the risk of damage. Using a dedicated relay instead of universal substitutes helps maintain the correct system operating parameters and compliance with factory service documentation.

Construction, Color, and Component Identification

The grey color of the housing facilitates quick identification of the relay in the fuse box or relay module, which is crucial during diagnostics and replacement. The compact 4‑pin design ensures:

• a clear arrangement of working and control contacts,
• a secure fit in the installation socket,
• easy removal and reinstallation during service work.

By adhering to the factory manufacturing standard, the relay works with original wiring harnesses without the need for modifications or soldering additional wires.

Original Origin and Mercedes Compatibility

This component comes from the Mercedes parts line, meaning it meets the vehicle manufacturer's quality standards. Original markings and its classification within the relays category simplify the selection of the correct component during repairs or system upgrades. The product has an assigned OEM part number and related interchangeable numbers, allowing for unambiguous verification in service catalogs and parts selection systems.

Condition, Verification, and Benefits of Installation

The part is offered as used, enabling cost-effective repairs while maintaining the original technical specifications. This type of relay is particularly useful when:

• there are intermittent power supply issues to selected consumers,

1. the component needs to be replaced with one that complies with the original electrical design.

Installing a correctly selected relay reduces the risk of overloads, improves system reliability, and simplifies subsequent vehicle computer diagnostics.

Why Choose This 4‑Pin Relay

Choosing an original relay dedicated to the Mercedes ML W163 is a way to maintain the integrity of the entire electrical system and avoid problems arising from the use of random substitutes. The grey housing, 4‑pin configuration, and assignment to a specific manufacturer's reference make the component easy to identify, and its parameters are predictable in operation. This solution is particularly recommended for repairs where operational consistency and compliance with service documentation are paramount.