Horn Signal Mercedes W176 W246 W156 W117 Fanfare 400Hz Left N/S A0005405500

The Mercedes W176 W246 W156 W117 Fanfare Horn 400Hz Left is an original acoustic component designed for factory installations in Mercedes vehicles. The precisely selected frequency of 400 Hz ensures a clear, easily audible warning signal, consistent with the sound characteristics used by the manufacturer. This is a solution for drivers who expect reliable operation of the acoustic signaling system without compromising on fit and functionality.

Specifications and technical data

• SKU: A0005405500-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0005405500
• Substitutable numbers: A0005405500, A 000 540 55 00, KD
• Location on the vehicle: Left
• Category: Horns

Purpose and Fit for Mercedes Models

The presented horn has been designed for Mercedes A-Class, B-Class, GLA, and CLA vehicles of the relevant generations, where a fanfare-type signal with a frequency of 400 Hz is used. The acoustic and electrical design is adapted to the factory wiring and mounting points in these models, facilitating seamless integration with the existing acoustic signaling system.

The component is intended for the left side of the vehicle, which is important when assembling a pair of horns (low and high tone) and for maintaining proper sound distribution in front of the vehicle. This ensures that the acoustic system retains its correct spatial characteristics and the signal is evenly distributed.

Construction and Acoustic Characteristics

The fanfare-type horn utilizes a diaphragm design that generates a stable, uniform tone at a frequency of 400 Hz. This type of signal is easily recognizable in road traffic, cuts through ambient noise, and remains clear to other road users. The applied housing geometry helps direct the sound wave towards the front of the vehicle, improving warning effectiveness.

The original manufacturing ensures consistency with Mercedes factory standards in terms of volume, sound timbre, and signal rise time. As a result, after replacement, there are no differences in sound between the left and right sides (when using a compatible horn on the other side).

Functionality and Installation Aspects

The horn works with the factory steering wheel horn control system and original relays and fuses. The use of the correct connector type and manufacturer-specified mounting points allows for near plug-and-play installation, without the need for electrical or mechanical modifications.

The placement on the vehicle's left side is important for:

• proper routing of the electrical harness,
• maintaining factory mounting points,
• correct sound direction relative to grilles and air intakes.

Such a fit minimizes the risk of incorrect installation, unwanted vibrations, or changes in acoustic characteristics.

Used Condition and Benefits of Choosing OEM Parts

This item comes from the Horns category and is offered in used condition, representing a reasonable compromise between cost and maintaining original operating parameters. Unlike many aftermarket replacements, an original OEM horn retains the factory sound characteristics and compatibility with the vehicle's installation, which is important for both user comfort and safety.

If you are considering whether a used original part or an aftermarket replacement would be a better choice, the article describing practical differences and selection criteria may be helpful: 5 reasons why a used OEM part can be a better choice than an aftermarket one. You will find specific examples and tips on how to make informed service decisions.

Expanding the Mercedes Acoustic Signaling System

If you are planning a comprehensive repair or upgrade of the front area responsible for acoustic signaling in your Mercedes and need other components from the same group, such as additional signals, horns with different tones, or compatible mountings, check the available parts in the Mercedes Horns category.

Summary

The Horn Signal Mercedes W176 W246 W156 W117 Fanfare 400Hz Left is an original horn designed for the left side of the vehicle, providing a warning signal consistent with factory standards. The stable 400 Hz frequency, compatibility with Mercedes installations, and fanfare-type construction make it a functional solution for drivers expecting predictable operation of the acoustic signaling system. Choosing this component allows you to maintain the characteristic sound of the signal in your car and keep the acoustic system in line with the manufacturer's design.