Multimedia Head Unit Mercedes W205 W213 Audio DAB Radio Controller A2139003026

Multimedia Head Unit Mercedes W205 W213 Audio DAB Radio Controller is an advanced factory module from the Electronic control modules and controllers group, designed to operate the multimedia system in selected Mercedes C-Class and E-Class models. As an original Mercedes component, it ensures consistent operation with the vehicle's remaining electronics and stable performance of audio and DAB digital radio functions.

Specifications and technical data

• SKU: A2139003026-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139003026
• Substitutable numbers: A2139003026, A 213 900 30 26
• Category: ECUs & Computer Modules

Purpose and function in the vehicle

The presented multimedia module acts as the central control unit for the audio system and radio functions in Mercedes W205 and W213 series cars. It is responsible for signal processing, communication with the display, control panel, and other onboard network components. Thanks to its integration with the vehicle's bus, it enables smooth control of audio sources, configuration settings, and DAB digital radio operation.

Key technical advantages

The original Mercedes multimedia module has been designed for precise cooperation with the factory electrical installation. The applied electronic architecture ensures:

• stable communication with other controllers in the vehicle,
• correct operation of audio and DAB radio functions,
• preservation of the factory logic of the multimedia system,
• possibility of diagnostics using standard service tools.

Thanks to this, the module is suitable both for replacing a damaged unit and for restoring full functionality of the infotainment system after a failure.

Benefits of choosing an original used module

Choosing an original Mercedes electronic module from the secondary market allows you to combine cost control with maintaining factory build quality. A used component from this group retains a design consistent with the manufacturer's standards, which facilitates installation and reduces the risk of compatibility issues. This solution is particularly beneficial for repairs where compliance with vehicle equipment and correct cooperation with existing controllers are essential.

If you want to better understand how to safely select and install used electronic modules in a car, it is worth reading the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Installation aspects and vehicle integration

The module has been developed as a component intended for installation in specific Mercedes W205 and W213 equipment configurations, which facilitates plug-and-play installation in vehicles with the appropriate specification. When replacing, it is recommended to:

• verify compatibility by part number and vehicle equipment,
• apply service procedures provided for onboard electronics,
• perform diagnostics after installation to confirm correct communication in the vehicle network.

This approach minimizes the risk of communication errors between controllers and allows for the quick restoration of full multimedia system functionality.

Application in Mercedes multimedia systems

Multimedia Head Unit Mercedes W205 W213 Audio DAB Radio Controller is designed to work as the central element of the infotainment system, responsible for handling audio signals, digital radio, and cooperation with the controller and display. Thanks to its factory design, it maintains user interface consistency, operational ergonomics, and compatibility with factory comfort and safety features that communicate with the multimedia system.

If you are planning a comprehensive repair or upgrade of the onboard electronics area in your Mercedes and need other elements from the same group, such as comfort controllers, body modules, or multimedia system control units, check the available parts in the Mercedes electronic control modules and controllers category.