Mercedes W639 W906 Battery Terminal Fuse Box Control Unit Module A6385454440

Mercedes W639 W906 Battery Terminal Fuse Box Control Unit Module is an original electrical system component designed for precise circuit management in Mercedes vehicles. This used fuse box ensures a factory-fit, maintaining the correct power distribution and electrical protection architecture in W906 series models.

Specifications and technical data

• SKU: A6385454440
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6385454440
• Substitutable numbers: A6385454440, A 638 545 44 40, BG
• Color: Black
• Category: Fuses & Fuse Boxes

Purpose and function in the electrical system

The fuse box in the Mercedes W906 is responsible for the organized distribution of power to key electrical consumers and for protecting circuits against overloads. Using an original component from the Fuses and fuse boxes category allows for maintaining compliance with factory service documentation and vehicle electrical diagrams.

This element is particularly important for:

• diagnosing electrical faults and replacing a damaged fuse box,
• restoring the electrical system after a short circuit or water damage,
• professional repairs of wiring harnesses and power modules.

Construction and functional features

The fuse box housing is finished in black, which facilitates integration with the factory environment of the mounting compartment in the Mercedes W906. The design provided by the manufacturer ensures a logical layout of fuse and relay sockets, which supports quick servicing and clear identification of circuits.

The main advantages of this solution include:

• factory layout of power paths and protection,
• compatibility with original electrical wiring harnesses,
• the ability to maintain the original circuit configuration without modifications.

Original origin and compatibility

The fuse box comes from the Mercedes product range, which ensures adherence to the vehicle manufacturer's quality standards and full compliance with factory electrical parameters. The presence of a dedicated OEM part number and available replacement numbers facilitates clear identification of the component in service catalogs and parts selection systems.

The product has an assigned SKU inventory code and a defined set of replacement numbers, which supports quick matching to a specific vehicle configuration in a workshop or store.

Condition and service application

The item is offered as used, which provides a cost-effective solution while maintaining the original specifications. This type of fuse box is suitable both for standard replacement of a damaged component and for more complex electrical system repairs, where maintaining the factory circuit architecture is crucial.

In workshop practice, using an original fuse box for the Mercedes W906 allows you to:

• minimize the risk of incompatibility with wiring harnesses and control modules,
• reduce the time required for adaptation and connector matching,
• maintain diagnostic clarity based on factory diagrams.

Integration with other system elements

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

For users who are simultaneously servicing thermal comfort systems in the vehicle and want to better plan the selection of components, the guide article Air conditioning and heating – parts selection and maintenance for year-round comfort, which describes a practical approach to used OEM components, may be useful.