Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit A2049060205

The Rear Fuse Box and SAM Control Module for Mercedes W204 is an original part from the Fuses and Fuse Boxes group, responsible for power distribution and control of selected circuits in the rear of the vehicle. As a genuine Mercedes component, it ensures compatibility with the car's electrical system and allows for the restoration of proper operation of systems powered from the rear body area.

Specifications and technical data

• SKU: A2049060205-5
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049060205
• Substitutable numbers: A2049060205, A 204 906 02 05
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and Function of the Rear SAM Module

The rear fuse box with SAM module in the Mercedes W204 serves as a central power distribution point for circuits located in the rear of the vehicle. It is responsible for the logical control of selected consumers and their protection with appropriately selected fuses and relays. Its placement in the rear area of the vehicle allows for shorter wiring harnesses and reduced voltage drops, which translates to more stable operation of electrical systems.

Construction and Integration with the Electrical System

The SAM module, integrated with the fuse box, is designed as a component to be mounted in the rear of the body, with dedicated connectors for the factory wiring harness of the Mercedes W204. The design includes an organized layout of fuse and relay sockets, which facilitates diagnostics and potential replacement of protective devices. The use of an original solution ensures compatibility with the vehicle's electrical architecture, including systems that monitor loads and power line statuses.

Benefits of Using an Original Fuse Box

Using the factory rear SAM module in the Mercedes W204 allows for compliance with the manufacturer's design parameters, which is particularly important for complex onboard electronics. The original fuse box is prepared to work with the existing wiring harness, ground points, and diagnostic systems, thereby reducing the risk of communication problems between control units. This solution promotes stable system operation and facilitates subsequent service, as factory schematics refer to this specific configuration.

Usage Characteristics and Installation

The component is intended for installation in the rear of the vehicle, in the structurally designated location for the Mercedes W204 fuse box. Thanks to the factory placement of connectors and mounting points, installation proceeds in an organized manner, without the need for electrical modifications. Using a used component allows for an economical restoration of the functionality of systems powered from the rear area, while maintaining the manufacturer's original electrical concept.

Why Choose a Used OEM Part

For complex components such as power distribution modules and fuse boxes, a used OEM part often provides a better fit than many aftermarket replacements. Factory components are designed for a specific model, which minimizes the risk of incompatibility with the wiring harness, brackets, or software of other control units. If you want to better understand the differences between original used components and aftermarket replacements, it is worth reading the practical guide 5 Reasons Why a Used OEM Part is a Better Choice Than an Aftermarket Replacement.

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