Mercedes S211 W211 Front Horn Signal Fanfare Tone 420Hz A0055422520

Mercedes S211 W211 Front Horn Signal Fanfare Tone 420Hz is an original component from the Horns category, designed for installation in the front part of the vehicle. It provides a clear, audible warning signal with a frequency of 420 Hz, supporting the active safety of your Mercedes. Finished in a subtle grey color, it blends harmoniously with the vehicle's factory front assembly.

Specifications and technical data

• SKU: A0055422520
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0055422520
• Substitutable numbers: A0055422520, A 005 542 25 20, A0065428220
• Location on the vehicle: Front
• Color: Grey
• Category: Horns

Purpose and function of the horn

The presented horn is designed as a component of the warning system in Mercedes vehicles. Mounted at the front of the vehicle, it generates a characteristic 420 Hz tone, which is easily recognizable in traffic and meets the requirements for signal clarity for other road users.

Its placement in the front area of the body allows for effective sound propagation in front of the vehicle, increasing warning effectiveness in emergency situations. The grey housing color facilitates discreet integration of the horn behind the grille or bumper, without interfering with the vehicle's styling.

Construction, acoustic parameters, and installation

The 420 Hz horn generates a clear, steady tone that cuts through ambient noise effectively. This type of acoustic characteristic is often used in premium vehicles because it provides a clear, yet not overly aggressive, warning signal.

The component is intended for installation in the front part of the vehicle, in the factory-designated location. This ensures proper cable routing and optimal acoustic exposure, which translates into stable operation of the signaling system.

Condition, application, and benefits of choosing a used part

The product comes from the secondary market, allowing for an economical replacement of a damaged horn while maintaining the manufacturer's original specifications. Choosing a used OEM horn is a cost-effective solution that is technically consistent with your car's factory installation.

This solution is particularly effective in cases of:

• post-accident repairs of the vehicle's front,
• damage to the horn system due to corrosion or water ingress,
• restoring full functionality of the warning system after a long period of operation.

Thanks to its original design, the horn works with the factory wiring harness and control system, which facilitates installation and reduces the risk of compatibility issues.

Practical application and safety aspects

A functional horn is one of the basic elements affecting a vehicle's active safety. In city traffic and on highways, a clear horn allows you to quickly signal danger, draw the attention of other drivers or pedestrians, and minimize the risk of a collision.

Maintaining the signaling system in good technical condition is also important from the perspective of periodic inspections – a faulty horn can result in a failed technical inspection. Replacing it with an original component from the same design group allows you to maintain the parameters specified by the vehicle manufacturer.

Expanding the signaling system and related components

If you are planning a comprehensive repair or upgrade of the front area in your Mercedes and need other components from the same group, such as additional horns, mounting brackets, or covers, check out the available parts in the Mercedes Horns category.

During the summer, when high temperatures affect the load on engine compartment components, it is also worth ensuring the efficiency of the cooling system – you can find more practical information on this topic in the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.