Mercedes W447 Steering Column Ignition Lock Starter Key Switch A4479007306

Mercedes W447 Steering Column Ignition Lock Starter Key Switch is an original ignition system component designed for installation in the steering column of vehicles in this series. This component is responsible for safe engine starting and steering column locking, ensuring proper interaction with the key and ignition mechanism. Thanks to its factory origin from the Mercedes brand, full structural compatibility with the factory steering system is maintained.

Specifications and technical data

• SKU: A4479007306-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4479007306
• Substitutable numbers: A4479007306, A 447 900 73 06
• Category: Steering Columns

Purpose and function in the steering system

The described element is part of the steering column assembly in Mercedes W447 series commercial vehicles/vans. Its task is to perform the functions of switching on the ignition, starting, and mechanically locking the column after the key is removed. A properly functioning ignition switch in the steering column affects:

• consistent operation of the steering lock mechanism,
• stable connection with the key and ignition cylinder,
• safe prevention of steering wheel rotation after the vehicle is turned off.

By using an original Mercedes solution, compatibility with the vehicle's electronics and other steering column components is maintained.

Technical characteristics and fitment

The Mercedes W447 Steering Column Ignition Lock Starter Key Switch has been designed as a component that works with the factory steering column without the need for structural modifications. This means that it:

• fits geometrically into the intended mounting location in the column,
• maintains the correct mounting and positioning points,
• is prepared for use with the original key and column accessories.

Such fitment reduces the risk of play, incorrect positioning, or problems with the steering lock, which is important for both the comfort and safety of vehicle operation.

Condition of the component and practical aspects

The offered Mercedes steering column ignition switch comes from the secondary market, which allows for an economical replacement of a damaged component while maintaining the original design. A used element of this type is particularly attractive in situations where you want to:

• maintain the factory steering system specification,
• reduce repair costs while choosing OEM parts,
• avoid problems with fitting low-quality replacements.

Before installation, standard verification by a workshop is recommended to ensure proper operation in a specific vehicle unit.

Benefits of using an original steering column ignition switch

Using an original component in the Mercedes W447 steering system translates into a number of practical benefits. The most important include:

• Factory fit with the steering column – no need for modifications, drilling, or adjusting housings.
• Consistency with the vehicle's security system – proper cooperation with the steering lock and starting mechanism.
• Stable operation over a long service life thanks to a design consistent with the manufacturer's requirements.

For commercial vehicles, where reliability and predictability of operation are important, choosing an original steering column ignition switch is a technically sound solution.

Related steering system components and technical knowledge

If you are planning a comprehensive repair or upgrade of the steering area in your Mercedes and need other elements from the same group, such as columns, joints, or intermediate shafts, check the available parts in the Mercedes Steering Columns category.

For a better understanding of how the entire steering system works, typical signs of wear, and diagnostic methods, it is worth checking out our guide: Steering system and power steering – how it works and what breaks?. This is a practical supplement to your knowledge when planning repairs or replacing components in the steering column area.