Mercedes W204 Fuse Box Terminal Connection Unit A2115452301

Mercedes W204 Fuse Box Terminal Connection Unit is an advanced component from the Electronic control modules and controllers group, responsible for managing selected electrical circuits in the rear part of the vehicle. This component is designed for installation in the rear body zone, ensuring stable operation of electrical systems and communication with other controllers in the Mercedes vehicle.

Specifications and technical data

• SKU: A2045458401
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045458401
• Substitutable numbers: A2045458401, A 204 545 84 01
• Location on the vehicle: Rear
• Category: ECUs & Computer Modules

Purpose and function of the SAM module

The SAM module in Mercedes C-Class W204 models acts as a local management center for the electrical installation in the rear of the vehicle. It controls selected circuits, monitors power supply, and transmits signals to other controllers, which allows for the consistent operation of comfort and safety systems.

Thanks to its location in the rear of the body, the module supports elements located in this area, working with the vehicle's main electronic network. The appropriate internal architecture ensures precise signal processing and stable communication within the vehicle's bus.

Compatibility and identification

The offered Mercedes W204 Fuse Box Terminal Connection Unit belongs to the group of original solutions used factory-wide in vehicles of this brand. Identification is based on the OEM part number and interchangeable numbers, which facilitates the selection of the correct controller for a specific car configuration.

Before purchasing, it is recommended to compare the module markings with the vehicle data and the existing controller to ensure full hardware and software compatibility. In case of doubt, it is worth consulting an automotive electrician or a service specializing in Mercedes electronics to select the appropriate element from the Electronic control modules and controllers group.

Installation and operational characteristics

The module is designed for installation in the rear of the vehicle, in accordance with the factory location provided by the manufacturer. Proper installation requires maintaining the correct order of connecting the connectors and securing the electrical harnesses to avoid mechanical stress and potential damage.

As a used element, the controller is a solution that allows for an economical repair of the electrical system while maintaining the original system architecture. In practice, this enables the restoration of the correct operation of functions supported by the module without the need for costly replacement of entire harnesses or additional components.

Practical application in service and diagnostics

In the case of faults related to power supply or control of elements located in the rear of the Mercedes W204, the SAM module is one of the key diagnostic points. Replacing it with a functional unit is often an effective stage of repair after prior confirmation of damage using a diagnostic tester.

Due to its role in the structure of the electrical installation, the module cooperates with other vehicle controllers, therefore, after installation, it may be necessary to perform adaptation or coding procedures depending on the equipment of the specific unit. A properly selected and configured module allows for stable vehicle operation and reduces the risk of recurring system errors.

More about used electronics and related products

If you want to better understand when choosing a used control module is justified and how to safely select a controller for your car, check out the guide: Second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

If you are planning a comprehensive repair or upgrade of the electrical installation area in your Mercedes and need other elements from the same group, such as body controllers, comfort modules, or other auxiliary controllers, check the available parts in the Mercedes Electronic control modules and controllers category.