Mercedes W211 Estate Fuse Box Relay Rear SAM Control Unit Module A2115452101

Mercedes W211 Estate Fuse Box Relay Rear SAM Control Unit Module is a factory-fitted electrical system component responsible for power distribution and circuit control in the rear section of the vehicle. As an original Mercedes component, it ensures proper integration with the car's electrical installation and stable operation of components located in the rear of the body. It is a practical solution for users looking for a proven, used module with maintained functionality.

Specifications and technical data

• SKU: A2115452101
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2115452101
• Substitutable numbers: A2115452101, A 211 545 21 01, KD
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and function of the rear SAM module

The described module is a component from the Fuses and fuse boxes category, mounted in the rear of the vehicle. It is responsible for handling selected electrical circuits in the trunk area and the rear part of the body, integrating protective functions (fuses) and control functions (relays and electronics). This allows for organized power management, load control, and rapid diagnostics of potential faults in this zone.

The module is dedicated to the W211 Estate body style, which means it is perfectly matched to the electrical architecture of this variant. Using an original solution allows for consistency with the factory electrical diagram, which facilitates service and reduces the risk of compatibility issues.

Benefits of using an original rear fuse box module

Using an original rear SAM module in a Mercedes W211 Estate provides a number of practical technical benefits:

• maintaining the factory logic of circuit control in the rear of the vehicle,
• proper fitment of connectors and electrical harnesses without the need for modifications,
• easier diagnostics using factory service tools,
• consistency with technical documentation and installation diagrams.

For users and workshops, this means stable operation of the electrical system and a lower risk of problems resulting from the use of unsuitable replacements. A used, functional module is also an economical solution, allowing for reduced repair costs while maintaining proper operating parameters.

Vehicle placement and installation aspects

The module is designed for installation in the rear of the vehicle, in accordance with the factory design of the Mercedes W211 Estate electrical system. This placement allows for shorter wire harnesses leading to receivers located at the rear, which improves installation clarity and facilitates service access. Replacing the component involves removing the old module, transferring the connectors, and re-securing it in the designated place, in accordance with the manufacturer's standards.

Due to the nature of the component, installation in a workshop environment is recommended, with a check of connection correctness and potential diagnostics after installation. This allows for verification that all circuits handled by the module are working correctly and that there are no errors in the onboard systems.

Why choose a used OEM module

A used Mercedes W211 Estate Fuse Box Relay Rear SAM Control Unit Module represents a reasonable compromise between cost and quality. The original OEM component is designed for long-term operation in a specific model, thanks to which it maintains proper operating parameters even after previous use. Compared to cheap replacements, this reduces the risk of compatibility issues, incorrect circuit operation, or communication errors in the vehicle's electrical network.

If you want to better understand how to optimally use the second-hand parts market and where such a solution is most cost-effective, it is worth reading the guide: rising repair costs and the boom in used parts – how to save on car service. This is a practical addition to your knowledge when planning repairs to your car's electrical system.

Expanding the modernization of the Mercedes electrical protection system

If you are planning a comprehensive repair or modernization of the electrical installation area in your Mercedes and need other elements from the same group, such as additional boxes, distribution modules, or housings with sockets, check out the available parts in the Mercedes Fuses and fuse boxes category.