Fuse Box Mercedes W203 C209 Rear SAM Module Relay Control Unit A2035453801

Fuse Box Mercedes W203 C209 Rear SAM Module Relay Control Unit is an advanced electrical system component responsible for managing circuits in the rear of the vehicle. As an original Mercedes brand component, it ensures proper integration with the electrical installation and stable communication with other control units. A used module from this series is a sensible choice for repairs when you want to maintain the factory logic of system operations.

Specifications and technical data

• SKU: A2035453801
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2035453801
• Substitutable numbers: A2035453801, A 203 545 38 01, 5DK008486-13, 5DK 008 486-13
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Function and role of the SAM module in the rear of the vehicle

The rear SAM module in Mercedes W203 and C209 models acts as a central hub for power distribution and control of selected electrical loads in the rear zone of the body. It is responsible for logical circuit switching, electrical protection via integrated fuses, and signal transmission between sensors, receivers, and other control units in the vehicle. This ensures that the electrical system operates in an organized manner and that diagnostics of potential faults are more predictable.

Category: Fuses and fuse boxes

The presented item belongs to the Fuses and fuse boxes category, which means it integrates both control and protection functions in a single housing. This type of solution reduces the number of connections, improves the clarity of the installation, and facilitates servicing. The module operates in the rear of the vehicle, where numerous circuits related to lighting, power supply for selected receivers, or additional comfort functions are concentrated.

Vehicle placement and installation aspects

The module is designed for installation in the rear zone of the car, which allows for shorter electrical harnesses and reduces voltage drops over long wire runs. This placement also facilitates easier service access – after removing the appropriate covers, it is possible to replace the module without interfering with the front part of the installation. In practice, this means shorter workshop labor time and a lower risk of additional damage to the wiring.

Application of the used SAM module

A used rear SAM module is particularly useful for repairs of vehicles that have suffered electrical damage, flooding, or overheating of the original unit. Choosing an original component from disassembly allows for maintaining consistency with the factory electrical architecture, which facilitates coding and adaptation in the vehicle. It is a practical solution for workshops specializing in the Mercedes brand and for users who want to restore full system functionality without the need for aftermarket replacements.

Mercedes fuses and fuse boxes – expansion and service

If you are planning a comprehensive repair or upgrade of the electrical zone in the rear of your Mercedes and need other elements from the same group, such as additional power distribution modules, box housings, or fuse inserts, check out the available parts in the Mercedes fuses and fuse boxes category.

Technical support and knowledge about Mercedes drivetrains

If you are interested in a broader context of how systems work in all-wheel-drive vehicles of this brand, including the cooperation of control units with traction and stability systems, it is worth reading the material comparing AWD solutions from different manufacturers. Practical information on the construction, service, and selection of used components can be found in the article xDrive, 4Matic, quattro or 4Motion – a comparison of AWD systems from BMW, Mercedes, Audi, and VW.