Mercedes W205 W213 Front Engine Compatment Fuse Relay Box Module A2139065706

Mercedes W205 W213 Fuse Box A2139065706 is a factory component of the power supply and electrical circuit protection system, designed for installation in the front of the vehicle. As part of the Fuses and Fuse Boxes group, it is responsible for orderly current distribution and protection of key electrical consumers. This is a practical solution for users who want to restore the proper functioning of their Mercedes' electrical system while maintaining high installation compatibility.

Specifications and technical data

• SKU: A2139065706
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139065706
• Substitutable numbers: A2139065706, A 213 906 57 06
• Location on the vehicle: Front
• Category: Fuses & Fuse Boxes

Function and Role of the Fuse Box in a Mercedes

The fuse box in Mercedes W205 and W213 models plays a central role in protecting the vehicle's electrical circuits. It consolidates fuses responsible for, among other things, powering control units, lighting, comfort systems, and safety components, minimizing the risk of electrical system damage from overloads or short circuits.

Its placement in the front of the vehicle facilitates service access, diagnostics, and potential replacement of individual fuses. This makes electrical system work more predictable and can minimize vehicle downtime.

Construction and Technical Purpose

The presented fuse box has been specifically designed for Mercedes vehicles, taking into account the factory layout of fuse sockets and electrical harness connectors. The construction includes:

• dedicated sockets for fuses of the vehicle's respective circuits,
• integrated connectors for attaching electrical harness wiring,
• a housing adapted for installation in the front compartment of the vehicle.

This configuration allows for the preservation of the original electrical architecture, which is particularly important when working with the complex electronic systems used in modern Mercedes C-Class and E-Class vehicles.

Benefits of Using an Original Fuse Box

Using a fuse box from the same model family offers a range of practical installation and operational benefits:

• High Installation Compatibility – fits factory wiring harnesses and mounting points in the front of the vehicle.
• Predictable electrical system behavior – no need for wiring modifications or connector adaptations.
• Easier diagnostics – a clear, organized layout of fuses and connectors in a single module.
• Ability to restore proper operation of many electrical systems with a single replaceable component.

For workshops and users, this means faster repairs, a lower risk of installation errors, and adherence to the manufacturer's original solutions.

Vehicle Placement and Installation Aspects

The fuse box is designed for installation in the front of the vehicle, which is important for both service access and the protection of wires and connectors. Proper seating in the original mounting points ensures correct harness routing, reduces mechanical stress, and guarantees stable electrical connections.

When replacing, it is recommended to:

• carefully compare the layout of sockets and connectors with the removed component,
• check the condition of the vehicle harness contacts before connecting,
• maintain the factory routing of wires in the front compartment.

This approach promotes trouble-free system startup after installation and reduces the risk of subsequent contact failures.

Application in Electrical Systems and Integration with Other Modules

The fuse box works with many of the vehicle's electronic modules, responsible for their power supply and protection. In modern Mercedes W205 and W213 vehicles, where extensive comfort, safety, and engine control systems require stable power, a functional fuse module is crucial for the proper operation of the entire system.

In case of extensive electrical repairs, it is also worth paying attention to other components from the same group to ensure the consistency of the entire power supply and circuit protection system.

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

To compare solutions used in other premium brands and to better understand the operation of electronic modules, you can read an article describing the servicing of iDrive systems and control units in BMW – you will find it here: Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models.