Mercedes W212 Fuse Box Relay Control Unit Module SAM A2129004025

The Mercedes W212 Fuse Box SAM Control Module is a factory electrical component designed specifically for W212 series models. It is responsible for central circuit management and logical control of numerous consumers, contributing to the stable operation of the electrical system. A used SAM module offers a solution for efficient and economical repair without compromising vehicle compatibility.

Specifications and technical data

• SKU: A2129004025
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2129004025
• Substitutable numbers: A2129004025, A 212 900 40 25, F005 V0 1523, F005V01523
• Category: Fuses & Fuse Boxes

Function of the SAM Module in Mercedes W212

The presented fuse box with SAM control module belongs to the Fuses and Fuse Boxes category and serves as the vehicle's power distribution center. It integrates into a single housing:

• circuit protection through appropriately selected fuses,
• electronic control of selected body and equipment functions,
• logic for monitoring the load of individual power supply lines.

Thanks to this, the SAM module in the W212 allows for organized wiring, reduces the number of connections, and facilitates the diagnosis of potential faults.

Benefits of Using an Original Mercedes Fuse Box

Using an original SAM module in the Mercedes W212 provides a range of practical advantages for everyday operation:

• Guaranteed Electrical Fit – compatibility with the factory wiring harness and vehicle electrical architecture.
• Stable operation of comfort and body systems – proper circuit control reduces the risk of incorrect messages and random errors.
• Simplified diagnostics – the module works with factory service tools, speeding up fault localization.
• Efficient repair possibility – replacing the fuse box with the control module often restores the correct operation of many functions simultaneously.

Product Characteristics and Condition

The offered fuse box with SAM module is an original Mercedes part, sourced from disassembly. As a used component, it is a sensible choice for repairs where compliance with factory specifications and maintaining proper communication within the vehicle's electrical network is crucial.

The module is intended for direct installation in the appropriate Mercedes W212 version, following standard service procedures. Before installation, it is recommended to verify compatibility with the part number and any interchangeable numbers in the vehicle's technical documentation or catalog systems.

Professional Application and Part Selection

The fuse box with SAM module in the Mercedes W212 is particularly important in vehicles equipped with advanced comfort and safety systems. The correct selection of this component directly impacts:

• the reliability of power supply to key consumers,
• proper cooperation with other control units in the vehicle,
• reduction of the risk of overloads and circuit burnouts.

In case of doubts regarding compatibility, it is advisable to use the OEM part number or reference numbers in service catalogs to select a module that matches the specific equipment configuration.

Related Products and Technical Knowledge

If you are looking for other Mercedes Fuses and Fuse Boxes compatible with various models of this brand, check out the Mercedes Fuses and Fuse Boxes available in our store to select a part that matches your car's specifications.

Considering the use of disassembled parts in the context of conscious vehicle operation and want to combine repair with reducing environmental impact? Read the article Eco-Tuning in Practice: How to Increase Performance While Reducing Carbon Footprint with Recycled Parts to better understand the technical and ecological advantages of using proven used components.