Mercedes S204 Estate Fuse Box Rear SAM Module Control Unit A2049005003

The Mercedes S204 Rear Control Module is an original part from the Electronic Control Modules and Controllers category, designed for installation in the rear of the vehicle. This component ensures stable management of selected body functions, supporting the proper operation of comfort and safety systems in Mercedes cars. Thanks to its factory design, the module is correctly matched to the electrical installation and electronic system architecture of this model.

Specifications and technical data

• SKU: A2049005003
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049005003
• Substitutable numbers: A2049005003, A 204 900 50 03
• Location on the vehicle: Rear
• Category: ECUs & Computer Modules

Purpose and Function of the Rear Module

The Mercedes S204 Rear Control Module is designed for installation in the rear of the body, where it is responsible for controlling selected vehicle components. As part of the electronic system, it collaborates with other controllers in the vehicle network, transmitting and receiving signals from sensors and receivers located at the rear of the car. This enables the proper functioning of features such as lighting, comfort elements, or selected driver assistance systems, according to the specific vehicle's configuration.

Benefits of Using an Original Mercedes Module

Choosing a controller from the Electronic Control Modules and Controllers group dedicated to Mercedes ensures consistency within the vehicle's entire electrical architecture. An original module provides:

• correct communication with the vehicle's data bus,
• proper compatibility with electrical harnesses and connectors,
• stable operation of functions assigned to the rear of the body,
• easier diagnostics using factory service tools.

This reduces the risk of communication errors, software incompatibilities, and integration issues with other controllers in the car.

Characteristics and Installation in the Rear of the Vehicle

The module's placement in the rear of the body facilitates routing harnesses to lamps, sensors, and other receivers located at the back of the vehicle. This solution shortens wire lengths, improves system resistance to interference, and simplifies potential service work. The controller is usually installed in a factory-prepared location, allowing for secure mounting and proper protection against external factors.

When replacing, it is recommended to:

• use appropriate procedures for disconnecting and connecting the electrical system,
• check the condition of connectors and harnesses in the rear of the vehicle,
• perform adaptation or coding according to the manufacturer's requirements.

Used Control Module – A Practical Service Solution

The presented controller is a used part, offering a sensible compromise between repair costs and maintaining original construction quality. In many cases, using a functional module from the aftermarket allows for the quick restoration of full functionality to the vehicle's electronic systems without the need to invest in a new component. This is a particularly beneficial solution for repairs of older vehicles where both reliability and operational economy are important.

If you want to better understand how to safely select and install used controllers and other electronic components, check out the guide: used car electronics – second-hand control modules and sensors. There you will find practical tips on selection by identification numbers, hardware and software compatibility, and common questions related to installation.

Selecting Other Mercedes Electronic Control Modules

For expanding or further repairing electronic systems, access to a wider range of controllers dedicated to this brand can be useful. If you are looking for other Mercedes Electronic Control Modules and Controllers, use the link: Mercedes Electronic Control Modules and Controllers. This will help you easily narrow down your search to components compatible with this brand's systems, making it easier to select the right parts for a specific model.