Fuse Box Mercedes W210 R170 Multifunctional Relay Fuse Unit Module A2105400072

Fuse Box Mercedes W210 R170 Multifunctional Relay Fuse Unit Module is an original electrical system component designed for advanced circuit management in the vehicle. This multifunctional fuse module is responsible for the stable operation of numerous electrical consumers, ensuring organized power distribution and easier diagnostics of potential faults.

Specifications and technical data

• SKU: A2105400072
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2105400072
• Substitutable numbers: A2105400072, A 210 540 00 72
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and function in the vehicle

The described fuse box belongs to the Fuses and fuse boxes category, designed specifically for Mercedes W210 and R170 series vehicles. Located in the rear part of the vehicle, it supports selected electrical body circuits, integrating fuses and relays responsible for various comfort and safety functions into a single housing.

The module acts as a central power distribution point in the given area, which:

• facilitates service and electrical fault location,
• ensures organized routing of wires and protection devices,
• reduces the risk of overloads thanks to appropriately selected fuses and relays.

Construction and technical advantages

The multifunctional design of the module combines several power paths into a single unit, allowing for compact installation in the rear of the vehicle. The layout of fuse and relay sockets is optimized for service – access to individual positions is clear, and the arrangement is logical, which facilitates quick inspections and replacements of protective elements.

Key advantages of this solution include:

• Original compatibility with Mercedes installations – the module is matched to the factory wiring harness,
• stable circuit operation thanks to a dedicated power path architecture,
• the ability to maintain the factory standard of electrical protection.

Condition and service application

The item comes from a vehicle and is offered as a used part, which is a cost-effective solution for repairs where compliance with factory specifications and cost optimization are important. This type of module is particularly useful in cases of installation damage resulting from socket overheating, contact corrosion, or relay failures in the existing box.

Replacing the rear fuse box allows for restoring proper circuit operation without the need to interfere with the entire wiring harness. Thanks to maintaining the original connection architecture, the installation process is orderly and predictable for an experienced automotive electrician.

Integration with other Mercedes electrical components

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, relay modules, or power distribution units, check the available parts in the Mercedes Fuses and fuse boxes category.

For drivers interested in improving the ergonomics of the driver's workspace and adjusting the control layout to their own preferences, an article describing the benefits of installing more advanced solutions in the cabin may be helpful – you can find it here: Personalization and ergonomics – when is it worth replacing the steering wheel with a premium model?.

Summary

The multifunctional rear fuse box for Mercedes W210 and R170 models is a practical service solution for users who want to maintain consistency with the factory electrical installation. The original design, fitment for the specific platform, and the ability to quickly replace a damaged module make it a functional choice for power system repairs in the rear zone of the vehicle.