Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM A6395450301

Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM is an advanced electrical system component responsible for managing numerous comfort and safety functions in the vehicle. This original module from the Fuses and fuse boxes category ensures consistent circuit control and stable operation of the electrical installation. It is a practical solution for users who want to restore full electrical functionality in their Mercedes W639 while maintaining factory standards.

Specifications and technical data

• SKU: A6395450301
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6395450301
• Substitutable numbers: A6395450301, A 639 545 03 01, A6395450401, A 639 545 04 01, A6395450601, A 639 545 06 01
• Category: Fuses & Fuse Boxes

Function and application of the SAM comfort module

The Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM acts as a central point for power distribution and control of selected body circuits. It integrates comfort and safety-related functions, allowing for organized wiring management and easier diagnostics of potential faults. By using an original solution, compatibility with the vehicle's factory electrical architecture is maintained.

This component works with the car's network of control units, enabling logical load management, control of selected circuits, and protection of the installation through appropriately selected fuses. Replacing the module with an original component helps reduce the risk of communication errors and malfunctions of comfort systems.

Benefits of using an original Mercedes module

Using an original module from the Fuses and fuse boxes category in a Mercedes W639 offers a number of practical advantages:

• maintaining compliance with the vehicle's factory electrical installation,
• consistent cooperation with other control units and comfort systems,
• simplified diagnostics for future inspections and repairs,
• reducing the risk of problems resulting from the use of non-original solutions.

For workshops and private users, this means more predictable installation and easier matching to the existing wiring harness, without the need to modify the installation.

Product characteristics and condition

The offered Mercedes W639 Fuse Box Relay Control Unit Electric Module SAM comes from a Mercedes vehicle and is classified as a used part. Such components are frequently chosen for repairs where maintaining the original specification while optimizing costs is key. The module is designed for installation in place of the factory element, which facilitates service work and reduces vehicle downtime.

Because this is an original control and protection element, the correct logic of circuit operation and proper distribution of fuses in the installation are maintained. This is particularly important in vehicles used intensively, where the stability of the electrical system has a direct impact on user comfort.

Selection and integration with the vehicle's installation

The Mercedes W639 SAM comfort module has an assigned OEM part number and associated interchangeable numbers, which allows for precise identification in service catalogs and parts selection systems. When choosing a component, it is worth verifying compatibility with the specific vehicle equipment version to ensure proper cooperation with existing control units and the wiring harness.

For workshops specializing in the Mercedes brand, this is a solution that facilitates maintaining the consistency of the vehicle configuration, and for the end user – a way to restore the proper operation of comfort functions without interfering with the installation design.

If you are planning a comprehensive repair or upgrade of the body electrical installation area in your Mercedes and need other elements from the same group, such as additional modules, distribution boxes, or circuit protection, check the available parts in the Mercedes Fuses and fuse boxes category.

More information on choosing used parts

When selecting used electrical components for a Mercedes, it is worth considering not only the price but also the origin and compliance with the factory specification. Additional tips on choosing original, used components can be found in our guide: The best used car parts – a guide to the most frequently chosen original parts for popular car makes and models.