Mercedes-Benz C-Class W203 Fuse Box Control Unit Module SAM A2035452901

Mercedes-Benz C-Class W203 Fuse Box Control Unit Module SAM is a factory-fitted electrical system component responsible for power distribution and circuit protection in the vehicle. This component from the Fuses and fuse boxes category ensures organized circuit routing and facilitates the diagnosis of electrical faults. Choosing an original SAM module for the Mercedes W203 helps maintain the integrity of the electrical system and reduces the risk of compatibility issues.

Specifications and technical data

• SKU: A2035452901
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2035452901
• Substitutable numbers: A2035452901, A 203 545 29 01
• Category: Fuses & Fuse Boxes

Function of the SAM module in the Mercedes W203

The SAM fuse box module in the Mercedes W203 acts as a central power distribution point for many electrical consumers in the vehicle. It is responsible for:

• protecting circuits through appropriately selected fuses,
• clear power distribution to individual components,
• organized arrangement of electrical harnesses in the engine bay or inside the vehicle,
• facilitating diagnostics in the event of an electrical system failure.

By using an original SAM module, the correct power logic is maintained, which is essential for the stable operation of comfort systems, lighting, and other electrical consumers.

Why choose an original fuse box module

For such a critical component as a fuse box, compatibility with the factory installation is key. An original module designed for Mercedes ensures:

• perfect fitment with electrical harnesses without the need for modifications,
• correct layout of fuse and relay sockets,
• stable electrical connections that limit voltage drops,
• preservation of factory circuit protection parameters.

This solution is particularly important in premium class cars, where complex electronics require a consistent, well-designed power supply system. Choosing an original module from the Fuses and fuse boxes category minimizes the risk of improper operation of onboard systems.

Characteristics and practical application

The presented SAM fuse box module is intended for use in the Mercedes W203 model, where it handles many key circuits. In practice, this means that it:

• serves as a central service point for fuses responsible for various vehicle zones,
• allows for quick location and replacement of a blown fuse,
• organizes the electrical layout, which facilitates the work of mechanics and automotive electricians,
• reduces the risk of unauthorized modifications to the installation that could lead to malfunctions.

For the user, this means more predictable vehicle behavior and easier maintenance in case of power supply issues for individual systems.

Product condition and benefits of choosing a used original

The offered module belongs to the group of used OEM parts, which in practice combines the advantages of factory quality with an attractive price. Compared to low-quality aftermarket replacements, a used original for Mercedes often provides:

• better fitment for a specific equipment version,
• preservation of factory connector and mounting geometry,
• greater long-term operational predictability.

If you want to better understand why the market is increasingly choosing such solutions, it is worth reading the article: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026. This is a good supplement to your knowledge when planning repairs for your Mercedes.

Expansion and modernization of the Mercedes electrical system

If you are planning a comprehensive repair or modernization of the electrical system in your Mercedes and need other components 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.