Mercedes S211 W211 Tone Horn Signal Woofer 420Hz Left N/S A0055426720

Mercedes S211 W211 Tone Horn Signal Woofer 420Hz Left N/S is an original acoustic component designed for the factory signaling system in E-Class estate and sedan models. It provides a clear, audible warning signal while maintaining compliance with Mercedes factory standards and consistency with the vehicle's existing electrical installation.

Specifications and technical data

• SKU: A0055426720
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0055426720
• Substitutable numbers: A0055426720, A 005 542 67 20
• Location on the vehicle: Left
• Color: Grey
• Category: Horns

Purpose and function of the horn

The presented low-tone horn operates at a frequency of 420 Hz and is designed for installation on the left side of the vehicle in the Mercedes S211 / W211 signaling system. It is responsible for generating the lower tone in the horn set, which allows for a characteristic, clear warning sound consistent with the factory acoustic profile.

This component is particularly important when restoring the full functionality of the signaling system after a collision, mounting corrosion, or mechanical damage. Using an original horn allows you to maintain the correct volume level and appropriate sound timbre, which is important for both safety and regulatory compliance.

Construction, color, and mounting fitment

The horn features a compact, closed housing design in gray, which facilitates aesthetic integration with the engine bay and body components. The placement on the left side of the vehicle was intended by the manufacturer to ensure optimal sound wave propagation and protection against direct exposure to external factors.

Thanks to its factory origin, the mounting point and electrical connector are matched to the installation in the Mercedes S211 / W211, which promotes plug-and-play installation without the need for harness modifications or custom brackets. Such a fit reduces the risk of looseness, unwanted vibrations, and a drop in sound quality.

Condition, service application, and benefits of replacement

The offered horn comes from the Horns category and is a used component, making it an attractive service solution for repairs of vehicles in their operational age. Replacing a damaged sound signal with an original component of this type allows you to:

• restore full functionality of the warning system,
• maintain the factory acoustic characteristics,
• avoid problems with electrical and mechanical fitment,
• reduce costs compared to new non-factory replacements.

For workshops and individual users, this means efficient repair without the need to experiment with universal sound signals, which often require additional modifications.

Integration with the signaling system and technical aspects

The 420 Hz low-tone horn works with other elements of the signaling system, creating a set with a properly balanced sound timbre. Proper operation requires maintaining the correct electrical connection and solid mounting at the designated point on the left side of the vehicle, which minimizes exposure to vibrations and moisture.

During installation, it is recommended to check the condition of wires, connectors, and ground points to avoid voltage drops and operational interference. Using an original component facilitates the diagnosis of potential faults, as the electrical and acoustic parameters are consistent with the vehicle manufacturer's specifications.

Signaling system expansion and additional information

If you are planning a comprehensive repair or upgrade of the front zone in your Mercedes and need other elements from the same group, such as additional sound signals, mounts, or power harnesses, check the available parts in the Mercedes Horns category.

For users interested in a broader perspective on acoustic modifications and the impact of sound components on a vehicle's character, an article describing legal exhaust system modifications in sports cars may be helpful – you can find it here: Used Mini John Cooper Works Pro sports exhaust – a legal way to get a racy sound and +7 HP.