Fuse Box Mercedes ML W164 W251 OM642 Diesel Relay Module Unit A1645450201

Fuse Box Mercedes ML W164 W251 OM642 Diesel Relay Module Unit is an original electrical system component designed for models equipped with the OM642 diesel engine. This used fuse box allows for efficient management of electrical circuits, ensuring a stable power supply to key vehicle components. It is an ideal solution for users looking for parts with factory-fitment and predictable performance parameters.

Specifications and technical data

• SKU: A1645450201
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645450201
• Substitutable numbers: A1645450201, A 164 545 02 01
• Fuel type: Diesel
• Category: Fuses & Fuse Boxes

Purpose and function in the electrical system

The fuse box in Mercedes ML W164 and W251 models with the OM642 unit is responsible for the logical distribution and protection of electrical circuits in a Diesel-powered vehicle. This component integrates fuse and relay sockets, which enables controlled power disconnection in the event of overloads or short circuits, limiting the risk of damage to the installation.

Thanks to its factory design, the fuse box works with the original wiring harness, maintaining compliance with the load parameters specified by the manufacturer. This allows for the proper operation of systems such as lighting, comfort systems, engine control, or additional equipment, without the need for interference with factory diagrams.

Construction and fitment for Mercedes ML W164 / W251

The fuse box in question is a component from the Fuses and fuse boxes group, designed specifically for Mercedes vehicles of the ML W164 and W251 series. This ensures the preservation of original mounting geometry, connector placement, and socket layout, which translates into a precise fit with the factory installation.

Such fitment facilitates installation – the component can be installed in place of the existing fuse box without the need for modifying harnesses or using adapters. From a service perspective, this is a solution that favors quick repairs, and from the user's perspective – a way to maintain the consistency of the electrical system with the manufacturer's specifications.

Benefits of using an original fuse box

Using an original fuse box in a Mercedes ML W164 / W251 with an OM642 engine brings a number of practical advantages:

• Factory electrical fitment – compliance with load parameters and protection logic intended for the Diesel unit.
• Consistency with the original wiring – no need to modify wires, connectors, or mounting brackets.
• Simplified diagnostics – the layout of fuses and relays corresponds to Mercedes service documentation, which speeds up fault localization.
• Stable operation of onboard systems – properly selected protections minimize the risk of failures resulting from electrical overloads.

Choosing a used, original component allows you to combine reasonable cost with maintaining a design consistent with the manufacturer's project, which is particularly important in vehicles equipped with extensive electronics.

Condition, verification, and service application

The offered fuse box comes from a Mercedes vehicle and is intended for re-installation in cars with an OM642 diesel engine. As a used component, it is a practical solution for electrical system repairs when the existing fuse box has suffered mechanical damage, overheating, or contact corrosion.

Before installation, it is recommended to perform a standard check of the condition of connectors, sockets, and contact surfaces, as well as to compare the pin layout with the removed component. This approach helps to reduce the risk of installation errors and ensures proper cooperation with the vehicle's existing installation.

Expansion of the protection system in Mercedes

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 fuse boxes, distribution modules, or protection housings, check the available parts in the Mercedes Fuses and fuse boxes category.

For drivers interested in a broader approach to the operation and repair of electrical components in the vehicle, practical tips on selecting used parts may be useful – you will find them in the article When is it worth replacing an alternator with a used one: a practical guide for drivers, which discusses, among other things, issues of diagnostics and assessment of component condition.