Mercedes Vito W639 Ignition Switch Barrel Lock Control Unit With Key A6395450908

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes Vito W639 Ignition Switch Barrel Lock Control Unit With Key is a factory-original ignition system component designed for Mercedes vehicles from the Vito W639 series. This used ignition switch, supplied with a key, allows for an efficient and technically correct replacement of a worn-out module while maintaining full compatibility with the vehicle's original electrical installation.

Specifications and technical data

• SKU: A6395450908-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6395450908
• Substitutable numbers: A6395450908, A 639 545 09 08
• Category: Ignition Modules

Technical characteristics of the ignition switch

The presented switch belongs to the Ignition Accessories category, responsible for managing the engine starting process and controlling the power supply to the vehicle's primary systems. The component's design is tailored to the electrical architecture of the Vito W639 model, ensuring proper integration with the factory immobilizer, ignition lock, and onboard wiring.

The inclusion of the key in the set facilitates integration with the existing system, reducing the need for additional mechanical modifications within the steering column. This solution is particularly useful when replacing a worn or damaged switch, where maintaining consistency with the original ignition system is a priority.

Purpose and application in the Mercedes Vito W639

The ignition switch with key has been designed to meet the specific requirements of the Vito W639 series, where precise fitment to the steering column and electrical harness is essential. This enables:

• restoration of proper ignition on/off functionality,
• stable power control for main electrical circuits,
• maintenance of compatibility with factory vehicle security features.

Such precise fitment is significant both in daily operation and during servicing, as it simplifies diagnostics and any potential future work on the ignition system.

Benefits of using an original pre-owned component

Choosing a used, original ignition switch for the Mercedes Vito W639 is a solution that combines cost-effectiveness with the preservation of proper manufacturing quality. A component sourced from the same model line:

• maintains factory operating parameters within the ignition system,
• reduces the risk of mechanical and electrical fitment issues,
• simplifies installation due to compatibility with original connectors and mounts.

For workshops and individual users, this means a more predictable repair process and a lower risk of requiring additional modifications to the vehicle's installation.

Support with selection and installation preparation

Before purchasing, it is recommended to verify the compatibility of the switch with your specific vehicle equipment version by using the manufacturer's markings and catalog data. This allows for precise matching of the component to your specific Vito W639 unit and helps avoid integration issues with the existing electrical system.

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

How to prepare your car for the season and maintain the ignition system

A functional ignition switch is important not only for user comfort but also for vehicle reliability in varying weather conditions. During periods of increased electrical system load, such as winter, it is worth paying special attention to the condition of components responsible for starting and power supply.

If you want to better plan your vehicle inspection before low temperatures arrive and learn which used components should be checked first, take a look at our guide Winter essentials: which used car parts are worth checking and replacing before the frost?, where you will find practical checklists and tips on selecting parts according to manufacturer markings.