Mercedes W205 Fuse Box Rear Relay Electrical Control Unit Box A2059068501

Mercedes W205 Fuse Box Rear Relay Electrical Control Unit Box is a factory-original electrical system component designed for installation in the rear of the vehicle. It is responsible for safe power distribution and protection of electrical circuits, which is crucial for the stable operation of comfort equipment and body electronics. Using an OEM component allows you to maintain the original installation architecture in your Mercedes, ensuring consistency with factory wiring and modules.

Specifications and technical data

• SKU: A2059068501
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2059068501
• Substitutable numbers: A2059068501, A 205 906 85 01
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and function in the vehicle

The described fuse box is a component from the Fuses and fuse boxes group, designed specifically for the Mercedes W205 platform. Located in the rear of the vehicle, it supports critical power circuits, such as rear lighting, selected comfort modules, or additional power consumers, depending on the specific vehicle configuration.

As an original Mercedes component, the electrical box is optimized for current flow, circuit protection, and compatibility with factory wiring harnesses. This minimizes the risk of improper fitment, which is typical for universal replacements.

Design and technical advantages

The construction of the electrical box is based on precisely designed fuse sockets and connectors that allow for secure wire seating and stable electrical contact. The layout of the current paths is adapted to the loads occurring in the W205 model, which promotes system reliability over a long service life.

Key technical advantages include:

• factory fitment to the Mercedes W205 electrical installation architecture,
• a designed fuse socket layout that facilitates service and diagnostics,
• a compact form allowing for convenient installation in the rear of the vehicle,
• retention of original mounting points and wire routing.

Vehicle placement and installation aspects

The fuse box is intended for installation in the rear zone of the vehicle, which is important for both circuit distribution and service access. This placement allows for shorter power wiring harnesses for components located at the rear of the body, reducing voltage drops and potential failure points.

When replacing, it is recommended to:

• compare the layout of sockets and connectors with the removed part,
• check the condition of the contacts and vehicle installation plugs,
• use the correct fuse values in accordance with Mercedes service documentation.

Thanks to the retention of the factory geometry of the box, the installation proceeds in an orderly manner, and the risk of harness stress or improper wire routing is limited.

Benefits of using an original electrical box

Choosing an original fuse box for the Mercedes W205 translates into a number of practical benefits. First and foremost, you maintain consistency with the factory installation design, which facilitates subsequent computer diagnostics and the interpretation of electrical diagrams. You also reduce the risk of compatibility issues that may occur when using non-original solutions.

A used OEM component is a reasonable compromise between cost and quality – you receive a component designed by the vehicle manufacturer while reducing expenses compared to a new part. This is particularly important for electrical system repairs, where stability and predictability of operation have a direct impact on the comfort of using the car.

Application in service and system expansion

The electrical box in the rear of the Mercedes W205 is often used not only for repairs after a failure but also for equipment modifications, such as adding selected power consumers or retrofitting the vehicle with elements available in higher trim levels. Basing such work on an original fuse box makes it easier to maintain the clarity of the installation and properly protect new circuits.

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

To better plan the service strategy for your premium car and consciously use the potential of used parts, it is worth familiarizing yourself with practical tips regarding the selection of components from dismantling – you will find them in the article Luxury within reach – how to service a legendary Porsche brand using proven used parts.