Mercedes W205 Harman Radio Stereo CD Player Audio Sat Head Unit A2059004236

Mercedes W205 Harman Radio Stereo CD Player Audio Sat Head Unit is an advanced component from the Electronic control modules and controllers group, designed for installation in the front part of the vehicle. The module is responsible for operating the audio, navigation, and multimedia system, ensuring seamless control of comfort and communication functions within the cabin.

Specifications and technical data

• SKU: A2059004236
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2059004236
• Substitutable numbers: A2059004236, A 205 900 42 36
• Location on the vehicle: Front
• Offset (ET):
• Category: ECUs & Computer Modules

Purpose and function in the vehicle system

This multimedia module works with the factory electrical installation of the Mercedes W205, integrating radio, navigation, and multimedia control functions into a single device. Its placement in the front of the vehicle allows for direct connection to the control panel, display, and factory sound system, which translates into stable operation of the entire infotainment system.

As an element from the Electronic control modules and controllers category, the device acts as a central unit managing audio and data signals, ensuring proper signal amplification and communication with other controllers in the vehicle.

Design and integration with the Harman system

The module has been designed to work with the Harman sound system, which means it is matched to the factory acoustic parameters of the interior. The applied electronic architecture enables:

• audio signal processing from various sources (radio, multimedia, navigation),
• cooperation with the factory display and user interface,
• control of amplification and signal distribution to the speakers,
• communication with other controllers via the vehicle bus.

Thanks to this, the consistency of all comfort and multimedia functions is maintained, and the user receives the predictable, factory-standard performance of the system.

Benefits of using the original module

Using the original multimedia module in a Mercedes W205 allows for maintaining compatibility with the vehicle's factory configuration. This means:

• proper cooperation with the existing electrical installation and controllers,
• preservation of navigation, radio, and multimedia functions without the need for wiring modifications,
• consistent operation with the Harman sound system,
• reduction of the risk of communication errors in the controller network.

Compared to universal solutions, the original module ensures predictable system behavior, which is particularly important in vehicles equipped with extensive comfort electronics.

Application in service practice

The component is suitable both for replacing a damaged module and for restoring the full functionality of the factory multimedia system after interference with the installation. Thanks to the preservation of the original control architecture, it is possible to:

• restore factory infotainment system settings,
• maintain compatibility with existing buttons and manipulators,
• preserve integration with other vehicle systems (e.g., navigation prompts in the audio system).

This solution is particularly beneficial for workshops specializing in automotive electronics and for users who want to maintain the consistent, factory character of the interior equipment.

Related products and technical knowledge

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

For a better understanding of how original multimedia modules affect vehicle behavior and the maintenance of a premium brand's character, it is worth reading an article describing the role of factory infotainment systems in luxury cars: Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?.