Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit A2049005501

Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit is an advanced fuse box with control unit functionality, responsible for power distribution and the control of selected electrical circuits in the rear of the vehicle. As an item from the Fuses and Fuse Boxes category, it ensures organized wiring and stable operation of electrical systems. This solution is dedicated to Mercedes C-Class W204 generation models, designed for precise fitment and reliability in daily use.

Specifications and technical data

• SKU: A2049005501
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049005501
• Substitutable numbers: A2049005501, A 204 900 55 01
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and function in the vehicle

The rear SAM module acts as a central power distribution point in the rear of the body, integrating the functions of a fuse box and relay unit with a control system. Its location in the rear area of the vehicle allows for shorter electrical harnesses, reduced voltage drops, and easier diagnostics of individual circuits. As a result, the rear lighting system, selected comfort features, and other electrical consumers are powered in an organized and controlled manner.

Construction and technical advantages

The module was designed by the vehicle manufacturer for full integration with the factory electrical installation. The applied architecture combines the following in one housing:

• a fuse section responsible for protecting circuits against overloads,
• a relay area controlling selected functions,
• connectors enabling quick connection of the rear vehicle wiring harnesses.

This solution reduces the number of intermediate connections, which translates into greater reliability of the electrical system and facilitates servicing. The module is structurally matched to the W204 platform, ensuring proper mounting and correct cable routing.

Vehicle placement and installation aspects

The component is intended for installation in the rear of the vehicle, in accordance with the factory installation design. This placement:

• shortens the power supply path to consumers in the rear zone,
• facilitates service access during diagnostics and fuse replacement,
• ensures a logical division of the installation into front and rear sections.

For proper operation, it is crucial to use a module dedicated to the Mercedes W204, which guarantees compatibility with the electrical harness, socket layout, and control logic. Correct module fitment minimizes the risk of communication errors and power supply issues for individual circuits.

Product characteristics and practical application

The offered module belongs to the Fuses and Fuse Boxes group, meaning it is responsible for both the protection and organization of electrical circuits in the vehicle. In practice, its application allows for:

• restoring the correct operation of electrical systems in the rear of the car after the failure of the previous module,
• reducing issues with randomly blowing fuses due to proper load distribution,
• simplifying diagnostics – all key protections and relays are located in one place.

The product is a used item, which, in the case of original Mercedes components, represents a favorable compromise between cost and maintaining factory specifications and fitment.

Why choose this SAM module

Choosing a rear SAM module dedicated to the Mercedes W204 is a solution that allows you to maintain the consistency of the vehicle's entire electrical system. The original design ensures:

• compatibility with the electrical architecture of the specific generation,
• stable operation of protected circuits,
• easier integration with the existing installation without the need for modifications.

For users who want to maintain the factory standard of workmanship and avoid problems typical of aftermarket replacements, the original fuse box module with control unit function is a particularly beneficial solution.

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 boxes, distribution modules, or protection housings, check the available parts in the Mercedes Fuses and Fuse Boxes category.

For drivers considering the use of dismantled components for a wider range of bodywork and equipment, an article describing the practical aspects of selecting used body parts may be useful – you can find more information in the material on replacing body parts with used car parts.