Mercedes W164 W251 High Tone Horn Signal Right O/S A0065424220

Mercedes W164 W251 High Tone Horn Signal Right O/S is an original sound signaling system component designed for installation on the right side of the vehicle. Thanks to its factory sound characteristics and perfect fit for the Mercedes electrical system, this horn provides a clear, distinct warning signal. It is a practical solution for repairing or completing the acoustic system in vehicles of this series.

Specifications and technical data

• SKU: A0065424220
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0065424220
• Substitutable numbers: A0065424220, A 006 542 42 20
• Location on the vehicle: Right
• Category: ECUs & Computer Modules

Purpose and function of the horn

The high tone horn right is responsible for generating the higher frequency range of the acoustic signal set, which improves the vehicle's audibility in traffic. Mounted on the right side of the body, it works in conjunction with other system components to create the characteristic, easily recognizable warning signal typical of Mercedes cars.

This element is part of the Electronic control modules and controllers group, which is why its proper operation is essential for correct interaction with the vehicle's electrical installation and safety systems.

Construction and integration with the electrical system

The horn has been designed for stable operation under automotive operating conditions – including variable temperatures, humidity, and exposure to road contaminants. The housing is adapted for mounting on the right side, which facilitates proper cable routing and secure attachment to the body structure.

As an element from the electronic control components group, it works with the factory wiring and the horn control system. This ensures that electrical parameters remain consistent, and the signal activates in a predictable and repeatable manner, without delays or interference.

Application in Mercedes vehicles

The product is intended for Mercedes W164 and W251 class models, where the sound signaling system is based on dedicated high-tone and low-tone horns. Using the correct component on the right side of the vehicle allows for maintaining the factory sound characteristics and compliance with the manufacturer's requirements regarding safety and user comfort.

Choosing an original solution from this group of components reduces the risk of connector fitment issues, incorrect volume levels, or improper interaction with other elements of the electrical system.

Condition, verification, and benefits of choosing a used component

The offered horn comes from the secondary market, which allows for an economical repair of the sound signaling system while maintaining the original design. A used element of this class is an attractive alternative to new replacements, especially when you want to maintain the factory operating specifications of the system.

If you want to better understand when choosing used electronic components is justified, it is worth reading our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips there regarding the selection and safe use of automotive electronics from the secondary market.

System expansion and related elements

If you are planning a comprehensive repair or upgrade of the electrical installation area in your Mercedes and need other elements from the same group, such as control modules, controllers, or additional electronic components, check the available parts in the Mercedes electronic control modules and controllers category.

This allows you to select consistent components in one place, which facilitates the planning of service work and reduces the risk of compatibility issues within the vehicle's electrical system.