Mercedes W213 C238 Horn Signal Alarm Siren High Tone Left N/S A2135422800

Mercedes W213 C238 Horn Signal Alarm Siren High Tone Left N/S is a factory-original component of the warning system, designed specifically for E-Class models and related vehicles. Thanks to its precisely tuned high tone, it provides a clear, audible signal on the road, while its dedicated left-side positioning ensures easy and correct installation. This is the ideal solution for users who expect consistency with the factory installation and stable acoustic performance.

Specifications and technical data

• SKU: A2135422800
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2135422800
• Substitutable numbers: A2135422800, A 213 542 28 00, A2135424400, A 213 542 44 00
• Location on the vehicle: Left
• Part type: Electric Horn
• Category: Horns

Purpose and function of the horn

The presented horn belongs to the Horns category and is responsible for generating the high-tone sound in the vehicle's acoustic signaling system. In practice, this ensures clear and immediate notification of other road users regarding your presence, in accordance with regulatory requirements and manufacturer standards. The component is designed for installation on the left side of the vehicle, which allows for maintaining the correct installation geometry and proper routing of the electrical harness.

Compatibility with Mercedes vehicles

The horn has been developed for the W213 and C238 platforms, which ensures a perfect fit for factory mounting points and the original electrical installation. Using an original Mercedes component minimizes the risk of malfunctions, unwanted vibrations, or discrepancies in sound characteristics compared to the configuration intended by the manufacturer.

Technical characteristics and installation

As a component of the warning system, the high-tone horn works in conjunction with other acoustic signaling parts to create a cohesive sound set. Its placement on the left side of the vehicle facilitates:

• maintaining the factory routing of wires and connectors,
• stable mounting to the bodywork or subframe,
• maintaining proper acoustic exposure to the outside of the vehicle.

Using an original horn from this group allows for installation without the need for any modifications to the wiring, which is beneficial from both a technical and operational standpoint.

Condition of the component and practical application

The offered horn is a used part, making it a sensible choice for post-accident repairs, replacing a damaged signal unit, or restoring full functionality to the warning system. Retaining the original design ensures compatibility with factory brackets, the electrical harness, and steering wheel controls. This is a practical solution for users who want to maintain consistency with factory specifications and avoid problems typical of low-quality aftermarket replacements.

Expanding the Mercedes acoustic signaling system

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

For drivers interested in a broader approach to vehicle system upgrades, including the selection of used OEM components and their integration with existing installations, you may find the article describing the practical aspects of selecting and installing turbochargers in sports models helpful – you can find it here: Go-Kart Feeling XXL: used N18 versus B48 turbocharger – which one to choose for a Mini Cooper S?.