Mercedes X164 W221 Ignition Key Remote Control Unit Fob A2309050639

Used key – requires programming

The key requires programming (coding) by a specialist to be fully functional. Mercedes X164 W221 Ignition Key Remote Control Unit Fob is an original component from the Electronic control modules and controllers group, designed to operate the central locking and remote control functions in Mercedes vehicles. Using a pre-owned component of this type allows for a cost-effective yet professional repair of the comfort system, while maintaining the factory logic of the system's operation.

Specifications and technical data

• SKU: A2309050639
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2309050639
• Substitutable numbers: A2309050639, A 230 905 06 39
• Part type: Central Timing Module
• Category: ECUs & Computer Modules

Technical specifications and intended use

The presented remote control key is an electronic component designed to work with factory comfort systems in selected Mercedes X-Class and S-Class models. As a part from the Electronic control modules and controllers group, it is responsible for wireless communication with the vehicle, enabling remote control of locks and integration with the existing electronic installation. A solution of this type is particularly useful when replacing a damaged remote, expanding a key set, or restoring full system functionality after a remote control module failure. Proper identification by part number and compatibility with the vehicle platform allows for precise matching of the component to a specific car configuration.

Benefits of using an original Mercedes remote control

Using an original remote control ensures:

• consistency with the vehicle's factory electronic architecture,
• proper cooperation with comfort and security systems,
• the possibility of professional adaptation and programming at a specialized service center. For workshops and private users, this means stable system operation, predictable system behavior, and reduced risk of communication issues between the key and the vehicle. A pre-owned component also allows for optimizing repair costs while maintaining the high quality of workmanship characteristic of the Mercedes brand.

Component condition and installation aspects

The remote control key is offered as a used part, which in practice means it comes from disassembly and may require standard preparatory steps, such as matching to a specific vehicle and programming based on procedures used in automotive electronics services. This type of component is a good choice for maintenance repairs when functionality and system compatibility are the priority, rather than purchasing a brand-new set. Before installation, it is recommended to verify compatibility with the vehicle's electrical system and perform adaptation using appropriate diagnostic equipment. A properly selected and programmed remote allows for restoring full remote operation without the need to interfere with other control modules.

Mercedes electronic control modules and controllers – expansion and repair

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

How to safely use pre-owned automotive electronics

When choosing a pre-owned remote control, it is worth knowing the basic principles of selection and adaptation of electronics to avoid problems with compatibility or the immobilizer. Practical tips on assessing the condition of electronic components, how to program them, and the cost-effectiveness of purchasing components from disassembly can be found in the article A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. If you are interested in a broader context of repairing older models, including the use of parts from disassembly as an alternative to unavailable components at authorized service centers, the guide No parts at the dealership? How to deal with repairing older models using parts from disassembly, which discusses a practical approach to economical and effective vehicle regeneration, may also be helpful.