Mercedes ML W164 Fuse Box Rear SAM Relay Control Unit Module A1645409062

Mercedes ML W164 Fuse Box Rear SAM Relay Control Unit Module is an advanced electrical system component responsible for precise circuit management in the rear of the vehicle. Thanks to the factory Mercedes design and its perfect fit for the specific ML W164 platform, this rear fuse box module ensures stable system operation and facilitates professional electrical repairs.

Specifications and technical data

• SKU: A1645409062
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645409062
• Substitutable numbers: A1645409062, A 164 540 90 62, A1645459332, A1644422500, KD
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and function in the vehicle

The described rear fuse box module is a component in the Fuses and Fuse Boxes category, specifically designed for installation in the rear of the vehicle body. It is responsible for power distribution and controlling selected circuits, which is essential for operating lighting, power sockets, or other electrical consumers located in the rear of the car.

Its placement in the rear zone of the vehicle helps shorten wiring lengths, reduce voltage drops, and simplifies fault diagnostics in the trunk area and the rear body section. For workshops and users, this means faster problem localization and a more organized electrical architecture.

Construction and technical characteristics

The module combines the functions of a fuse box and a relay controller in one housing, creating a compact solution for the rear part of the electrical system. The applied SAM (Signal Acquisition Module) architecture enables:

• collecting signals from sensors and consumers located in the rear of the vehicle,
• power distribution to individual circuits,
• controlling relays responsible for selected electrical functions.

As a result, the module acts as a local hub for signal and power management, relieving the main electrical system and improving the clarity of the electrical layout in the Mercedes ML W164.

Benefits of using the original rear fuse box module

Using the original rear fuse box module in a Mercedes ML W164 provides a number of practical service and operational benefits:

• High electrical compatibility – matching the Mercedes installation architecture minimizes the risk of communication errors and coding issues.
• Stable operation of rear vehicle circuits – proper management of loads and relays reduces the risk of burnout and voltage instability.
• Simplified diagnostics – clear separation of rear circuits in one module allows for faster identification of the source of faults.
• Professional mounting fit – the module is structurally designed for the rear zone of the ML W164 and works with factory brackets and wiring harnesses.

Application in service practice

This rear fuse box module is suitable for both repairs after electrical failures and for restoring full system functionality after mechanical damage or flooding of the rear part of the vehicle. For workshops specializing in the Mercedes brand, it is a convenient solution that allows for:

• restoring proper power supply to consumers in the rear of the vehicle,
• eliminating problems with randomly disappearing electrical functions,
• maintaining consistency with factory service documentation.

The item belongs to the Fuses and Fuse Boxes group, which makes it easy to identify in catalogs and select based on dedicated solutions for the ML W164.

Condition and selection of the appropriate module

The offered module is a used part, which in service practice often represents a reasonable compromise between repair costs and maintaining the vehicle's original electrical architecture. When selecting, it is worth paying attention to compatibility with the specific equipment version and installation configuration of the given ML W164 unit to ensure proper cooperation with other control units.

In case of doubts regarding fitment, it is helpful to compare the physical construction of the module and the connectors with the part currently installed in the vehicle, which helps reduce the risk of ordering errors.

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

For a comparison of solutions used in other brands and inspiration regarding the modernization of sports and compact cars, it is worth reading an article describing the evolution of a popular hot-hatch – Hot-hatch legend: the evolution of the VW Golf GTI from Mk1 to Mk8 – design changes and VW car parts.