Mercedes W211 W219 Fuse Box Rear SAM Module Electrical Fuse Unit A2115459301

Description

Mercedes W211 W219 Fuse Box Rear SAM Module Electrical Fuse Unit is a specialized electrical fuse box designed for installation in the rear section of the vehicle. As a component from the Fuses and fuse boxes group, it is responsible for stable power supply and protection of multiple electrical circuits, ensuring safe and predictable operation of the electrical system in your Mercedes.

Specifications and technical data

• SKU: A2115459301
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2115459301
• Substitutable numbers: A2115459301, A 211 545 93 01
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and function of the rear SAM module

The described rear SAM module is a factory-fitted electrical assembly used in Mercedes E-Class W211 and CLS W219 models, serving as a central power distribution point in the rear of the body. It is responsible for the logical distribution of voltage to selected consumers, integrating the function of a fuse box with a control module, which facilitates diagnostics and servicing of the electrical system.

Thanks to its compact design and matched connectors, the module allows for organized wiring harness routing, reduces the risk of contact overheating, and facilitates the localization of potential faults in circuits protected by fuses.

Construction and placement in the vehicle

The module has been designed for installation in the rear of the vehicle, in accordance with the factory electrical system concept of Mercedes. Placement in the rear area helps to shorten the length of cables to consumers located at the back of the body, which translates into lower voltage drops and more stable system operation.

The module housing is adapted for operation in the vehicle compartment, with appropriately arranged fuse sockets and harness connectors. The layout of the fuse fields is logical and clear, which makes it easier for technicians to quickly assign a specific circuit to a given socket and perform inspection activities efficiently.

Benefits of using the original module

Using the original rear SAM module in a Mercedes W211 or W219 ensures:

• Full electrical compatibility with the factory vehicle installation, without the need for wiring modifications.
• Stable circuit protection thanks to precisely selected fuse fields.
• Easier electrical fault diagnostics due to the integrated module design.
• Reduction of the risk of incorrect fitment, typical of universal replacements.

This solution is particularly recommended for professional electrical system repairs when you want to maintain factory operating parameters and predictable behavior of comfort and safety systems.

Condition, verification, and service application

The item comes from the secondary market, which makes it an attractive cost-effective alternative while maintaining the original manufacturer’s specification. Such modules are frequently used in specialized workshops dealing with Mercedes electronics repair, especially in cases of damage resulting from circuit overload, water ingress, or contact corrosion in the previously installed box.

Before installation, a standard service procedure is recommended: visual inspection of connectors, checking the condition of fuse fields, and verifying correct operation after installation using an appropriate diagnostic tester. This approach allows you to fully utilize the module’s potential and restore the proper operation of systems powered from the rear part of the installation.

System expansion and related components

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

For drivers interested in a broader approach to vehicle service, including the drivetrain, a practical guide describing common faults and principles of selecting used components may be helpful – you can find it in the article Gearbox: manual, automatic or DSG – common faults and a guide to buying a used gearbox.