Fuse Box Mercedes W204 Rear SAM Relay Fuse Box Control Module A2049000902

Fuse Box Mercedes W204 Rear SAM Relay Fuse Box Control Module is a factory-original electrical component designed for installation in the rear section of the vehicle. It is responsible for safe power distribution and the protection of electrical circuits, which is crucial for the stable operation of comfort equipment and lighting. This used module allows for an economical yet factory-standard compliant repair of the electrical system in a Mercedes W204.

Specifications and technical data

• SKU: A2049000902
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049000902
• Substitutable numbers: A2049000902, A 204 900 09 02, EM
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and function in the vehicle

The described module belongs to the Fuses and fuse boxes category and is mounted in the rear part of the vehicle body. Its task is to organize and protect specific electrical circuits, such as lighting elements, comfort systems, or additional power consumers located at the rear of the car. Thanks to its factory design, the module works seamlessly with the original wiring harness and the Mercedes electrical architecture, which reduces the risk of installation errors.

Construction and technical advantages

The fuse box module was designed by the vehicle manufacturer for a precise fit to the W204 platform. This means appropriately prepared sockets, connectors, and mounting points that facilitate installation and removal in the rear of the car. The applied design supports:

• organized routing of electrical circuits,
• easy service access to fuses,
• stable seating in the body, minimizing the risk of looseness and wire abrasion.

As a result, the module provides a practical solution for electrical system repairs, allowing for the maintenance of factory protection logic and system clarity.

Benefits of using the original rear fuse box module

Choosing an original component from the Fuses and fuse boxes group for a Mercedes offers a number of practical benefits. Above all, it ensures:

• compliance with the vehicle's factory electrical diagram,
• appropriate operating parameters for the protected circuits,
• maintenance of system transparency for future repairs or equipment upgrades.

The used module helps reduce service costs while maintaining consistency with the original electrical system of the Mercedes W204. This solution is particularly beneficial for professional post-accident repairs, flood damage remediation, or replacing a damaged fuse box.

Vehicle placement and installation aspects

The module is intended for installation in the rear of the car, which requires access to the appropriate section of the trunk or service area, depending on the specific body version. Thanks to the factory design, it features:

• dedicated mounting points in the body structure,
• connectors matched to the original electrical wiring harness,
• logical fuse layout to facilitate diagnostics.

Such a solution promotes efficient service and reduces the time required for component replacement, which is important for both workshops and users who care about the effective maintenance of their vehicle.

Condition and use in vehicle service

The offered module comes from disassembly and is intended for reinstallation in a car after prior verification by a mechanic or automotive electrician. In practice, it serves as a component that restores the proper operation of protected circuits in the rear of a Mercedes, especially in situations where the existing fuse box has suffered mechanical or electrical damage. Using an original component allows for maintaining consistency of protection parameters with the vehicle manufacturer's specifications.

If you are planning a comprehensive repair or upgrade of the electrical zone in the rear of your Mercedes and need other elements from the same group, such as additional modules, housings, or protective connectors, check the available parts in the Fuses and fuse boxes Mercedes category.

For users interested in a broader approach to servicing premium cars and optimizing operating costs, it is worth reading an article describing the use of verified used parts in luxury segment vehicles: Luxury within reach – how to service a Porsche legend using verified used parts.