Mercedes SLK R172 Horn Signal Right O/S Fanfare 400Hz A0075426020

Mercedes SLK R172 Horn Signal Right O/S Fanfare 400Hz is a factory-original warning system component, designed specifically for the right side of the vehicle. It enables the generation of a clear, audible 400 Hz tone, ensuring a distinct warning signal in traffic. This is a practical solution for drivers who wish to maintain acoustic and technical consistency with the vehicle's original configuration.

Specifications and technical data

• SKU: a0075426020
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0075426020
• Substitutable numbers: A0075426020, A 007 542 60 20
• Location on the vehicle: Right
• Category: Horns

Purpose and function of the horn

The presented horn is a component of the acoustic signaling system in the Mercedes SLK R172 model, mounted on the right side of the vehicle. It is responsible for generating a uniform, stable tone which, when combined with the second signal (on the opposite side), creates the characteristic sound of the warning system used by the manufacturer. This ensures compliance with factory requirements regarding volume and sound timbre.

Acoustic parameters and user benefits

The horn operates at a frequency of 400 Hz, which provides a well-audible, clear signal in typical road conditions. This type of acoustic characteristic:

• facilitates quick attention from other road users,
• ensures proper sound penetration in urban noise,
• maintains compliance with the vehicle's factory sound profile.

By maintaining the original frequency, the horn works well with the vehicle's electrical system, which reduces the risk of interference and improper operation of the signaling system.

Vehicle fitment and installation

The element is intended for installation on the right side of the body, which is important both in terms of acoustics and electrical wiring routing. Using a dedicated horn for this side of the vehicle:

• facilitates correct positioning relative to airflow and body panels,
• ensures proper connection to the factory installation,
• reduces the need for modifications to mounts or wiring.

Such fitment promotes efficient installation and preserves the manufacturer's original design concept.

Product characteristics and service application

The horn belongs to the Horns category, meaning it is a specialized component intended solely for generating a warning signal. It is suitable both for standard replacement of a damaged signal and for restoring full system functionality after accident repairs or work on the front of the body. The used nature of the product allows for an economical restoration of a functional signaling system while maintaining the manufacturer's original specifications.

Why choose this horn

Using a dedicated horn on the right side of the Mercedes SLK R172 allows you to maintain the consistency of the warning system without the need for replacements with uncertain parameters. This solution is particularly beneficial when you want to:

• maintain the factory sound characteristics,
• ensure proper cooperation with the existing electrical system,
• reduce installation time thanks to matched mounting points.

A signaling system configured in this way supports safe, predictable vehicle operation in daily use.

If you are planning a comprehensive repair or upgrade of the front area of your Mercedes and need other components from the same group, such as low-tone signals, high-tone signals, or additional signaling modules, check the available parts in the Mercedes Horns category.

To better assess when choosing aftermarket components is justified and how to safely select electrical and electronic sub-assemblies, it is worth reading our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?