Mercedes W204 Rear SAM Module Fuse Box Control Unit A2049006301

Mercedes W204 Rear SAM Module Fuse Box Control Unit is an advanced electrical system component responsible for power distribution and controlling multiple circuits in the rear part of the vehicle. As part of the Fuses and fuse boxes group, it ensures organized circuit routing and stable operation of the electrical installation. This used SAM module is a solution that allows for a technically correct repair while maintaining cost-effective service expenses.

Specifications and technical data

• SKU: A2049006301
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049006301
• Substitutable numbers: A2049006301, A 204 900 63 01, 5DK00922514, 5DK 009 225 14
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Function of the SAM module in the Mercedes W204

The SAM module in the rear of the body is responsible for the logical connection of the electrical installation with circuits protected by fuses. In practice, this means controlling and protecting many receivers located at the rear of the vehicle, such as lighting, selected comfort features, or auxiliary components. Thanks to its compact design and factory-engineered electrical path layout, the module reduces the risk of overloads and facilitates fault diagnostics.

Vehicle placement and importance for the installation

The presented fuse box is designed for installation in the rear of the car, which allows for shortening the length of electrical harnesses leading to the receivers in this area. Such a solution:

• reduces voltage drops over long wire sections,
• facilitates the location and replacement of fuses responsible for the rear zone of the vehicle,
• organizes the layout of wires, which improves serviceability and clarity of the installation.

Thanks to its dedicated placement, the module works with the factory electrical architecture of the Mercedes W204, which helps maintain stable operating parameters of the onboard systems.

Benefits of using an original fuse box

Choosing an original SAM module from the Fuses and fuse boxes group allows you to maintain compliance with the vehicle's factory specifications. Key advantages of this solution include:

• factory fitment for electrical harnesses and connectors in the Mercedes W204,
• preservation of the original protection logic and circuit division,
• reduced risk of compatibility issues compared to generic replacements,
• the ability to use existing service documentation and installation diagrams.

For workshops and users, this means more efficient diagnostics, predictable system behavior, and easier planning of further service work.

Characteristics of the used product

The offered module comes from the secondary market, which allows for reducing repair costs while maintaining the original design. A used component of this type is particularly attractive for older Mercedes W204 models, where the priority is to maintain vehicle performance within a reasonable budget. This type of component works well as a replacement for a damaged fuse box when it is necessary to replace the entire module rather than just a single fuse.

Application in service practice

The rear fuse box SAM module is often replaced in situations involving thermal damage, flooding, or contact corrosion in the original component. Using a functional module allows for restoring proper power supply to receivers in the rear of the vehicle and eliminating errors related to circuit breaks. A properly selected component also facilitates subsequent computer diagnostics, as it works with the factory control and monitoring systems of the installation.

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, fuse sockets, or distribution modules, check the available parts in the Mercedes Fuses and fuse boxes category.

For users interested in a broader approach to economical servicing of premium cars, including sports and luxury vehicles, an article describing the practical use of dismantled parts may be helpful – more information can be found in the material Luxury within reach – how to service a Porsche legend using proven used parts.