Mercedes W211 Front Fuse Box SAM SRB Module Relay Control Unit A2115454201

Mercedes W211 Front Fuse Box SAM SRB Module Relay Control Unit is a specialized relay and fuse module designed for installation in the front section of the vehicle. It is responsible for power distribution and control of key electrical circuits, ensuring stable operation of the electrical system in Mercedes E-Class W211 generation models. This used, original OEM component is a sensible choice for professional electrical system repairs.

Specifications and technical data

• SKU: A2115454201
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2115459101
• Substitutable numbers: A2115454201, A 211 545 42 01
• Location on the vehicle: Front
• Category: Fuses & Fuse Boxes

Function and role of the SAM/SRB module in Mercedes W211

The front SAM/SRB module acts as a central distribution box for many electrical circuits in the front compartment. It integrates the following into a single housing:

• fuse sockets responsible for protecting high-current circuits,
• relays controlling selected electrical consumers,
• internal electronics managing power supply.

Thanks to this solution, diagnostics and servicing of the electrical system in the Mercedes W211 are simplified, and the risk of secondary damage in the event of a single circuit failure is limited.

Vehicle placement and installation aspects

The module is designed for installation in the front part of the vehicle, in the area factory-designated by the manufacturer. This placement ensures:

• short cable runs to the main consumers in the front of the car,
• easier service access during inspections and repairs,
• consistency with the original electrical wiring harness routing.

The original design of the module allows for installation in place of the factory component without the need for wiring modifications, which is important for maintaining compliance with Mercedes service documentation.

Benefits of using an original fuse box

Using an original SAM/SRB module in a Mercedes W211 translates into a number of practical benefits:

• Full electrical compatibility with the vehicle's factory installation,
• preservation of the protection characteristics specified by the manufacturer,
• proper cooperation with other control units in the vehicle network.

By choosing a used OEM component, you maintain the integrity of the electrical system, which is important for both reliability and subsequent computer diagnostics.

Product condition and service application

The offered module belongs to the Fuses and fuse boxes group and is intended for service applications in Mercedes vehicles. It is effective for:

• repairing damage after short circuits in the installation,
• troubleshooting power supply issues for selected circuits,
• restoring system functionality after flooding or overheating of the original box.

For workshops specializing in the Mercedes brand, this is a practical solution that allows for an economical, yet technically correct repair.

If you are planning a comprehensive repair or upgrade of the power supply and electrical protection area in your Mercedes and need other elements from the same group, such as additional boxes, protection modules, or power distributors, check the available parts in the Mercedes Fuses and fuse boxes category.

Additional information and technical support

Before selecting the module, it is worth comparing the markings with the damaged element and verifying the vehicle's equipment configuration to ensure full functional compatibility. If you have any doubts regarding the use of original, used OEM components in electrical system repairs, the following article describing the advantages of such a solution may be helpful: Quality assurance and OEM safety – why used original car parts are the best choice for your car?.