Mercedes ML W164 W251 Fuse Box Relay Module Control Unit A1645403572

The Mercedes ML W164 W251 Fuse Box is an original electrical system component designed for Mercedes models of the ML W164 and R W251 class. It allows for organized, safe power distribution to key vehicle consumers, ensuring stable operation of electrical systems. Thanks to its construction in line with factory standards, fuse box installation is predictable and matched to the factory wiring harness.

Specifications and technical data

• SKU: A1645403572
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645403572
• Substitutable numbers: A1645403572, A 164 540 35 72
• Category: Fuses & Fuse Boxes

Purpose and Function in the Vehicle

The fuse box in the Mercedes ML W164 and W251 serves as a central power distribution point where fuses protecting individual circuits are located. It is responsible for:

• protecting the electrical system against short circuits and overloads,
• clearly grouping power circuits for individual vehicle systems,
• easy service access to fuses during diagnostics,
• stable connection with the factory Mercedes electrical harness.

By using an original fuse box from the Fuses and Fuse Boxes category, compliance with the factory installation design is maintained, which limits the risk of compatibility issues.

Construction and Fit for Mercedes ML W164 / W251

The presented fuse box has been designed specifically for the electrical architecture of the ML W164 and W251 models, taking into account the layout of connectors, fuse sockets, and mounting points. This means:

• factory fuse sockets for appropriate types and ratings,
• dedicated connectors for wiring harnesses used in these Mercedes generations,
• a construction adapted to operate in a compartment with specific temperature and vibration conditions.

Such a fit allows for maintaining the original wire routing and correct placement of the component in the mounting space, which is important for both safety and subsequent servicing.

Benefits of Using an Original Fuse Box

Choosing an original fuse box for the Mercedes ML W164 / W251 offers a number of practical advantages:

• Full Electrical Compatibility – maintaining correct assignment of circuits and fuses to individual vehicle systems.
• Stable System Operation – reducing the risk of random malfunctions resulting from incorrect power distribution.
• Easier Diagnostics – the mechanic deals with a system consistent with Mercedes service diagrams, which speeds up fault localization.
• Hassle-Free Installation – no need for wiring modifications, adapter fabrication, or mounting adjustments.

Item Condition and Service Application

The offered fuse box comes from a used vehicle, making it an attractive service solution for owners of Mercedes ML W164 and W251 who want to restore proper operation of the electrical system without resorting to expensive aftermarket parts. A used OEM component allows for maintaining consistency with the vehicle's factory specifications while limiting repair costs.

Related Items and Additional Information

When planning repairs to the power supply and circuit protection system, it is also worth considering other elements from the same group, such as additional modules or housings, to comprehensively refresh the electrical system in your Mercedes. If you need other products from the Mercedes Fuses and Fuse Boxes group, check the available parts in the Mercedes Fuses and Fuse Boxes category.

If you are interested in a broader context of using used components in automotive, including their potential use in vehicle repairs and modifications, it is worth reading the practical tips described in the article Audi on Second-Hand Parts – Tuning and Repairs Without Quality Loss, which shows how to wisely use components from the secondary market.