Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Unit A2139068701

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Unit is an advanced power distribution module designed for installation in the rear section of vehicles in this series. It is responsible for the stable power supply of multiple electrical circuits, ensuring organized wiring routing and simplified diagnostics. Thanks to the factory design by Mercedes, the fuse box integrates perfectly with the original electrical harness, which facilitates trouble-free installation and subsequent operation.

Specifications and technical data

• SKU: A2139068701-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139068701
• Substitutable numbers: A2139068701, A 213 906 87 01
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and function in the electrical system

The SAM fuse box in Mercedes W205 and W213 models serves as a central power distribution point in the rear of the vehicle. It integrates circuits responsible for, among other things, lighting, comfort features, and selected safety systems, which allows for logical organization of the installation and a reduction in the number of connections.

Its location in the rear zone of the vehicle helps shorten wire runs to consumers, which reduces voltage drops and makes it easier to locate potential faults. The module is designed as an integral part of the vehicle system, ensuring compatibility with Mercedes' electrical architecture, including protection logic and the load capacity of individual circuits.

Design and construction advantages

The box belongs to the Fuses and fuse boxes category, which means it combines the function of circuit protection with clear organization. The layout of fuse sockets and connectors is optimized for service – access to individual circuits is clear, and the arrangement of fuse fields facilitates diagnostic work.

The main design advantages include:

• factory fitment for Mercedes electrical installations,
• a compact housing adapted for installation in the rear of the vehicle,
• a clear division of circuits, facilitating quick service,
• power paths designed by the manufacturer with appropriate load capacity.

Benefits of using an original module

Using an original SAM fuse box in a Mercedes translates into high electrical and mechanical compatibility with the factory installation. Proper alignment with the harness and mounting points reduces the risk of wire stress, loose connections, and poor electrical contact.

Compared to aftermarket replacements, the original module ensures:

• preservation of factory circuit protection parameters,
• lower risk of communication errors in vehicle systems,
• easier integration with diagnostic procedures used in service centers.

For the user, this means more stable operation of electrical systems and a reduction in unplanned downtime related to installation failures.

Application in the rear of the vehicle

The placement of the box in the rear zone of the body is particularly important in vehicles equipped with extensive comfort and lighting systems. Dedicated connector placement allows for the logical connection of components located in the trunk and surrounding areas, which facilitates both installation and subsequent modifications or repairs.

Such a solution also helps limit interference with the main vehicle harness – most service operations can be performed locally, within the rear box, without the need to disconnect the installation in other areas of the car.

Condition and practical aspects of choosing a used module

The offered item is in used condition, which in the case of original Mercedes components often represents a reasonable compromise between cost and functionality. Modules of this type do not contain components that wear out mechanically, which is why, with proper use, they retain their properties for a long time.

If you want to learn more about the specifics of the second-hand parts market and dispel doubts regarding their durability and safety, it is worth reading the article Used car parts: Myths and facts you need to know, which discusses the most common concerns of drivers in an accessible way.

Related items from the same group

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 protection modules, fuse box housings, or power connectors, check out the available parts in the Mercedes Fuses and fuse boxes category.