Mercedes W213 C238 Power Relay Fuse Box Unit Cover A2135403839

Mercedes W231 C238 Fuse Box A2135403839 is an original electrical system component from the Fuses and Fuse Boxes group, designed for installation in the front of the vehicle. It ensures organized circuit routing, stable fuse seating, and convenient service access, contributing to the trouble-free operation of the Mercedes electrical system. This solution is dedicated to users expecting factory fitment and predictable operating parameters.

Specifications and technical data

• SKU: A2135403839
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2135403839
• Substitutable numbers: A2135403839, A 213 540 38 39, A2135462900, A 213 546 29 00
• Location on the vehicle: Front
• Category: Fuses & Fuse Boxes

Purpose and Function in the Vehicle

The fuse box installed in the front of the vehicle is responsible for the logical distribution and protection of key electrical circuits, such as power supply for the engine unit, lighting, and comfort features. Thanks to its factory design for Mercedes W231 / C238, proper current path cross-sections, suitable sockets for individual fuses, and compatibility with the original wiring harness are maintained.

Its placement at the front of the vehicle facilitates diagnostics and potential fuse replacement, while also allowing for a clear structure of the entire electrical system.

Construction and Fitment for Mercedes W231 / C238

The Mercedes W231 C238 Fuse Box A2135403839 has been designed as a system component, with appropriately spaced sockets and connectors for the factory Mercedes wiring harness. This means that:

• electrical connectors are positioned according to the original installation design,
• the housing is adapted to the mounting points in the front compartment,
• the fuse socket layout corresponds to the vehicle's factory diagram.

This solution minimizes the risk of installation errors and eliminates the need for wiring modifications, which is particularly important in modern Mercedes models with extensive electronics.

Condition, Origin, and Replacement Numbers

The offered fuse box belongs to the group of used OEM parts, which in practice means maintaining original geometry, mounting points, and compatibility with factory wiring harnesses. The product has a dedicated OEM part number and assigned replacement numbers, which facilitates precise verification of compatibility with a specific vehicle equipment version.

The presence of the OEM number and reference numbers allows for unambiguous matching of the fuse box to a specific Mercedes unit, without the need for installation modifications or the use of compromise solutions.

Benefits of Using an Original Fuse Box

Using a dedicated fuse box in the front of a Mercedes offers a number of practical benefits:

• Factory Fitment – maintaining the original layout of sockets, connectors, and mounting points, without the need for adaptation.
• Electrical System Compatibility – correct cooperation with the vehicle's wiring harness and control modules.
• Easier Diagnostics – a clear fuse layout simplifies circuit localization and quick fault resolution.
• Safe Operation – correctly selected current paths and sockets minimize the risk of overheating and improper connections.

For users who wish to restore full functionality to the electrical system after damage or corrosion of components in the front compartment, using an original fuse box is a technically justified and long-term stable solution.

How to Verify Compatibility by OEM Number

When selecting a fuse box for a Mercedes, it is crucial to compare the OEM part number and replacement numbers with the vehicle's documentation or the markings on the old fuse box. This helps avoid problems with differences in socket layout, connector types, or supported circuits.

If you want to deepen your knowledge on verifying component compatibility by numbers, practical examples of selecting parts for Mercedes, and ways to reduce risks when shopping online, it is worth reading the guide: Risk-Free Online Parts Shopping – 5 Ways to Verify OEM Numbers.

If you are planning a comprehensive repair or upgrade of the electrical system area in the front of your Mercedes and need other parts from the same group, such as additional fuse boxes, power modules, or socket housings, check the available parts in the category Mercedes Fuses and Fuse Boxes.