Mercedes W447 Ignition Switch Lock Barrel Control Module A4479000811

Mercedes W447 Ignition Switch Lock Barrel Control Module is an original component from the Ignition Accessories group, designed for precise operation of the engine starting system. The integrated control module ensures consistent interaction with the vehicle's electronics, which translates into stable ignition system performance and convenience in daily operation.

Specifications and technical data

• SKU: A4479000811
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4479000811
• Substitutable numbers: A4479000811, A 447 900 08 11
• Category: Ignition Modules

Purpose and function in the ignition system

The presented ignition lock with control module has been designed specifically for W447 series models, where it is responsible for handling the ignition sequence, power supply to the installation, and engine start authorization. Thanks to its factory design, the component works with the vehicle's electrical system without the need for modifying wiring harnesses or the steering column housing.

As a part from the Ignition Accessories group, this module plays a key role in communication between the ignition switch and other vehicle controllers, which is important for both reliable starting and the proper operation of electronic security systems.

Module construction and integration with vehicle electronics

The ignition switch combined with the control module forms a compact unit that simplifies installation and reduces the number of connections prone to wear. The applied electronic architecture is compliant with Mercedes factory standards, which facilitates integration with the existing controller network as well as comfort and safety systems.

This solution allows for:

• consistent transmission of ignition signals to other modules,
• stable operation of the electrical system during startup,
• preservation of the original operating logic of the vehicle's security system.

Benefits of using an original Mercedes component

Choosing an original ignition switch module for a Mercedes translates into high compatibility with the factory installation and predictable ignition system behavior. Proper electrical and mechanical fitment reduces the risk of communication errors between controllers and problems with engine starting after component replacement.

The main advantages include:

• maintaining factory operating parameters of the ignition system,
• no need for modifications to the installation or steering column housing,
• consistency with the vehicle's other electronic systems.

Component condition and service application

The offered ignition switch module is a used part, which makes it an attractive solution for repairs where cost optimization is important while maintaining the original design. This type of component will prove useful both when replacing a damaged ignition lock and during service work related to vehicle starting problems or unstable electrical system operation during the startup phase.

Due to its factory origin, the component is particularly recommended in situations where the priority is to maintain compatibility with the original vehicle configuration and minimize the risk of incompatibility with existing controllers.

Expanding the ignition system in your Mercedes

If you are planning a comprehensive repair or upgrade of the ignition system area in your Mercedes and need other elements from the same group, such as additional control modules, key handling elements, or accessory ignition components, check out the available parts in the Mercedes Ignition Accessories category.

To better plan service work on your car and understand how choosing the right used components affects driving comfort, it is worth reading our guide: Suspension knocking? Discover a clever way to restore factory handling precision without spending a fortune at the service center.