Mercedes C-Class C204 Rear SAM Fuse Box Relay Control Module 2049060205

Mercedes C-Class C204 Rear SAM Fuse Box Relay Control Module is an advanced component from the Electronic control modules and controllers group, responsible for power distribution and control of selected circuits in the rear of the vehicle. The module is designed for installation in the rear section of the body, ensuring organized electrical circuit routing and stable operation of comfort and safety systems in the Mercedes C-Class C204 generation.

Specifications and technical data

• SKU: 2049060205-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: 2049060205
• Substitutable numbers: 204 906 02 05, 2049060205, 5DK011022
• Location on the vehicle: Rear
• Category: ECUs & Computer Modules

Function and role of the rear SAM module in the Mercedes C-Class C204

The rear SAM module in the Mercedes C-Class C204 acts as a central point for managing power and electrical protection in the rear of the vehicle. It is responsible for the logical separation of circuits, integration of the fuse box, and cooperation with other onboard controllers. This makes the electrical system clearer, and the diagnostics of potential faults become faster and more predictable. Positioning the module in the rear area of the vehicle limits the length of wiring harnesses for lights, comfort elements, and additional receivers, which translates into lower voltage drops and more stable power supply. Precise integration with the Mercedes electrical architecture allows for maintaining the factory operating logic of all functions without the need to interfere with original installation diagrams.

Benefits of using an original control module

Using an original rear SAM module in the Mercedes C-Class C204 primarily ensures full compatibility with the factory installation. The controller is designed to work with the vehicle's communication bus, which enables proper data exchange with other modules and correct handling of diagnostic functions. Key advantages of using this solution include:

• maintaining the original circuit control logic in the rear of the vehicle,
• organized integration of the fuse box with the electrical installation,
• possibility to use factory mounting points and connectors,
• easier diagnostics using standard Mercedes service tools. Thanks to this, the process of replacing or repairing the electrical system in the rear of the car is predictable, and the risk of problems resulting from non-original solutions is minimized.

Purpose, installation, and integration with the vehicle

The presented rear SAM module is intended for installation in the rear body section of the Mercedes C-Class C204. The vehicle placement has been factory-designed to ensure easy service access while providing protection against external factors typical of vehicle operation. In practice, the installation involves:

• seating the module in the designated place in the rear of the vehicle,
• connecting factory electrical harnesses to the appropriate connectors,
• verifying the correctness of power supply and communication with other controllers. In many cases, after physical installation, it is recommended to perform diagnostic procedures to verify the correctness of communication in the vehicle network and the operation of safety features. A correctly selected and installed module allows for restoring stable operation of electrical systems in the rear of the Mercedes C-Class C204.

Why consider a used electronic module

Choosing a used component from the Electronic control modules and controllers group is a reasonable solution when it is necessary to replace a damaged controller while optimizing repair costs. An original module sourced from dismantling retains its factory design, and with proper verification and selection, it can effectively replace a damaged element. If you want to better understand when choosing used electronics makes sense, how to assess their condition, and what to pay attention to when selecting controllers and modules, it is worth reading the guide: A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. The article helps to consciously approach the purchase of used electronic components and reduce the risk of a poor choice.

Expanding the control system in a Mercedes – what else is worth checking

If you are planning a comprehensive repair or upgrade of the electrical installation area in your Mercedes and need other elements from the same group, such as additional controllers, power management modules, or fuse boxes in other vehicle zones, check the available parts in the Mercedes electronic control modules and controllers category.