Mercedes W204 Key Reader Ignition Lock Remote Control Unit Module A2079052600

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W204 Key Reader Ignition Lock Remote Control Unit Module is an original ignition control system component, belonging to the Switches, control elements and ignition locks category. Designed specifically for Mercedes W204 class models, it ensures precise ignition operation and consistency with the vehicle's factory electronics. This used OEM component is a sensible choice for professional repairs or replacing a worn ignition lock in Mercedes vehicles.

Specifications and technical data

• SKU: A2079052600
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2079052600
• Substitutable numbers: A2079052600, A 207 905 26 00
• Category: Switches & Controls

Purpose and function in the vehicle

The ignition lock in the Mercedes W204 is responsible for initiating the operation of all key vehicle systems – from powering onboard electronics and activating safety systems to starting the engine. As a component from the Switches, control elements and ignition locks group, it works with control modules and the electrical installation, enabling correct key recognition and sequential circuit engagement.

Thanks to its factory design tailored to the Mercedes architecture, the ignition lock maintains the correct mounting points, connectors, and operating logic, which facilitates installation and reduces the risk of electronic compatibility issues.

Advantages of using an original Mercedes ignition lock

Choosing an original ignition lock for the Mercedes W204 brings a number of practical technical benefits:

• Full compatibility with the electrical system – a component designed for a specific model platform, with no need for wiring or mounting modifications.
• Stable cooperation with control modules and comfort systems, which reduces the risk of communication errors in the vehicle network.
• Replication of the factory ignition switch operating characteristics, including the sequence of engaging individual circuits.
• Suitability for professional repairs where maintaining the original control system architecture is essential.

Using an OEM component allows for maintaining high-quality repairs at controlled costs, which is particularly important in the case of premium class cars such as Mercedes.

Integration with the control system and installation

The ignition lock in the Mercedes W204 is part of a complex control system where correct signal recognition and cooperation with other modules are of key importance. Using an original component from the switches and control elements group helps maintain:

• proper communication with body electronics and security systems,
• consistency with factory diagnostic procedures,
• operational stability in the long term.

During installation, it is recommended to use Mercedes service documentation and perform a functional check of all ignition positions after installation to confirm correct cooperation with the vehicle's electrical system.

Why choose a used OEM component for a Mercedes

In the case of Mercedes vehicles, using used, original components is often an optimal compromise between quality and repair cost. This also applies to the ignition lock in the W204 model, where factory fitment and electronic compatibility have a direct impact on user comfort and starting reliability.

If you want to learn more about the advantages of using original, used components in cars of this brand, it is worth reading the blog article Used parts for Mercedes – original parts from dismantling, which discusses the practical aspects of selecting and operating such components.

Expanding the control system in a Mercedes

If you are planning a comprehensive repair or upgrade of the electrical control zone in your Mercedes and need other elements from the same group, such as function switches, control modules, or additional ignition locks, check the available parts in the Switches, control elements and ignition locks Mercedes category.