Mercedes W177 Relay 052 Fuse Box Relay Slot B D E 70A Tyco SET X2 A0035421619

The Mercedes W177 Fuse Box Relay 052 Set X2 are original components from the relays group, designed for use in Mercedes vehicle electrical systems. The set of two relays ensures consistent operation of selected circuits in the fuse box, which translates to stable and predictable performance of the car's electrical systems.

Specifications and technical data

• SKU: A0035421619-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0035421619
• Substitutable numbers: A0035421619, A 003 542 16 19
• Category: Relays

Application and Function in the Electrical System

The presented set of relays is intended for installation in the fuse box of Mercedes W177 family models. These components are responsible for switching selected high-current circuits using a low-current control signal, which reduces the load on sensitive electronic components and increases the reliability of the entire system.

In practice, a correctly selected relay:

• stabilizes the operation of powered electrical consumers,
• reduces the risk of electrical system overheating,
• facilitates the diagnosis of potential faults in power circuits.

Original Origin and Compatibility

The offered product comes from the Mercedes-Benz OE line, which means maintaining factory operating parameters and full compliance with the vehicle manufacturer's requirements. The relays are assigned a specific OEM part number and have dedicated replacement numbers, allowing for precise selection for the car based on service documentation or parts catalogs.

For users and workshops, this means:

• certainty of fit for the fuse box in a given equipment variant,
• no need for modifications to the wiring or harnesses,
• preservation of the original control logic for electrical systems.

Characteristics of the X2 Set

The set includes two type 052 relays, allowing for simultaneous replacement of a pair of components operating under similar conditions. This configuration is beneficial from both a service and reliability perspective – replacing two cooperating relays minimizes the risk of a situation where one new component works with another that is significantly worn.

This solution is particularly useful for:

• planned electrical system maintenance,
• troubleshooting issues related to unstable power supply to selected consumers,
• modernizing or restoring the factory equipment configuration.

Condition, Verification, and Quality of Used Parts

The relays are categorized as used original parts, allowing for a reasonable cost while maintaining factory specifications. Each element of this type is routinely verified for visual and functional integrity to ensure correct operation in the target vehicle.

If you want to better understand how to safely select used components and what the real economic benefits are, it's worth reading the guide: Why Buy Used Powertrain and Electrical Components – Facts Instead of Myths.

Selecting a Relay by OEM Number and Category

When selecting a relay for the fuse box in a Mercedes, it is crucial to rely on the OEM part number and associated reference numbers. This helps avoid problems with incorrect circuit operation, errors in control units, or mechanical incompatibility in the relay socket.

If necessary, it is advisable to consult the vehicle configuration with the service documentation or parts catalog, paying attention to:

• the exact W177 model variant,
• the type and placement of relays in the fuse box,
• the element's application in a specific circuit (e.g., power supply to a selected module).

Summary

The Mercedes W177 Fuse Box Relay 052 Set X2 is a practical solution for users and workshops looking to restore proper electrical system operation using original components. The set of two relays from the relays category facilitates comprehensive replacement of elements in the fuse box, supporting the stability and predictability of electrical systems in Mercedes cars.