Mercedes W212 Fuse Box Module Rear Relay Electric Control Unit SAM A2129060005

The Mercedes W212 Rear SAM Fuse Box Module is a specialized electrical system component responsible for power distribution and protection in the rear of the vehicle. This module is from the original Mercedes line, ensuring proper fit with the factory installation and seamless integration with the car's electronics. It serves as a functional service solution for electrical system repairs in W212 models.

Specifications and technical data

• SKU: A2129060005-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2129060005
• Substitutable numbers: A2129060005, A 212 906 00 05
• Location on the vehicle: Rear
• Part type: Fuse Holder
• Category: Fuses & Fuse Boxes

Purpose and Function of the SAM Module

The rear fuse box module is responsible for the logical arrangement of circuits and the protection of key electrical consumers in the rear body section. In practice, this means organized power routing to components such as rear lighting, specific control units, and additional comfort systems, in accordance with the W212's electrical architecture.

Thanks to its design by the vehicle manufacturer, the module integrates with the factory wiring harness, minimizing the risk of installation errors and communication issues between individual control units.

Construction and Fit for the Rear of the Vehicle

This fuse box is designed for installation in the rear body section, facilitating service access to the circuit protection in this area. The layout of fuse slots and connectors is adapted to the W212's system, maintaining installation clarity and reducing the need for wiring modifications.

The original Mercedes solution ensures compatibility with the vehicle's diagnostic system and correct assignment of circuits to specific fuses, simplifying future diagnostics and potential service work.

Benefits of Using an Original Module

Using the factory rear fuse box module offers several practical benefits:

• Maintains compliance with Mercedes' factory electrical architecture,
• Ensures proper fit with wiring harnesses and mounting brackets in the rear area,
• Provides organized access to fuses responsible for rear vehicle circuits,
• Reduces the risk of communication problems between control units and the electrical system.

For the user, this translates to more predictable electrical system behavior and easier future serviceability.

Product Characteristics and Service Application

This module belongs to the Fuses and Fuse Boxes category and is intended for Mercedes W212 vehicles. It serves as a replacement part for damaged installations, power supply issues in specific circuits, or when restoring proper electrical system function in the rear of the car.

Due to its factory origin and dedicated placement in the vehicle, the module is a practical solution for workshops specializing in the Mercedes brand and for users seeking parts that match the original manufacturer's specifications.

Expanding the Mercedes Electrical System

If you are planning a comprehensive repair or upgrade of the electrical system area in your Mercedes and require other components from the same group, such as additional boxes, distribution modules, or fuse housings, check the available parts in the Mercedes Fuses and Fuse Boxes category.

When planning broader modernization work on your vehicle, it is also advisable to consult tips on selecting used components, which you can find in the article Stock vs. Sport Suspension – Construction Differences and Is It Worth Buying Used Suspension Parts?, to help you make informed choices about aftermarket parts.