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 system component, designed for precise integration with the electrical installation of vehicles in this series. Thanks to its factory design, it ensures stable ignition system operation and proper communication with other control modules. This is a solution for users who expect reliable and predictable engine starting without interfering with the vehicle's factory architecture.

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 Mercedes W204 models is responsible for handling the ignition switching process, as well as transmitting signals to the vehicle's electronic systems. As a component from the Switches, control elements and ignition locks group, it works with the steering column, steering lock, and comfort modules, ensuring consistent operation of the entire control system.

The original design allows for maintaining factory operating parameters, which is particularly important in vehicles equipped with extensive onboard electronics. Using a dedicated ignition lock minimizes the risk of communication errors, interference with the immobilizer, or starting problems.

Construction and compatibility

The ignition lock used in the W204 series was designed by the vehicle manufacturer, which translates into a perfect fit for original wiring harnesses, mounts, and electrical interfaces. As a result, installation is straightforward, without the need for modifications to the installation or the use of additional adapters.

The component has an assigned OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific car configuration. In practice, this means the ability to precisely select the ignition lock for a given Mercedes unit, taking into account the equipment version and the control modules used.

Benefits of using an original Mercedes ignition lock

Using an ignition lock dedicated to the Mercedes W204 brings a number of practical benefits:

• Factory fit – maintaining the original geometry of mounts and electrical connectors.
• Consistency with vehicle electronics – proper cooperation with control modules and security systems.
• Stable ignition system operation – reducing the risk of engine starting problems.
• Predictable vehicle behavior – no need for software or installation modifications.

For users who value maintaining the original characteristics of the vehicle, choosing a component signed by the Mercedes brand is a safe and technically justified solution.

Condition and installation aspects

The offered ignition lock is a secondary market component, which allows for an economical restoration of the ignition system's efficiency while maintaining the manufacturer's original specifications. Before installation, it is recommended to perform a standard verification of the vehicle's electrical system and check the correct seating of the connectors to ensure proper communication with other modules.

Due to the connection of the ignition lock with security and control systems, it is worth entrusting the installation to a workshop with experience in Mercedes vehicles. This helps to reduce the risk of diagnostic errors and ensures proper adaptation of the component in the vehicle.

Expansion of the control system and selection of other components

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

When working on safety and control systems, it is also worth paying attention to the procedures for selecting used components in other key vehicle systems. An article describing the principles of selecting sensitive elements, such as discs, calipers, or ABS modules, may be helpful – detailed guidelines can be found in the material: Second-hand braking system: how to safely select discs, calipers, and ABS?.