Alarm Siren Mercedes W204 W212 Anti-Theft Horn Signal A2228202926

Mercedes W204 W212 Alarm Siren A2045456740 is an original part from the horns category, designed for factory Mercedes vehicle security systems. A used alarm siren allows for an economical yet functional repair of the alarm system, maintaining compatibility with the car's electrical system.

Specifications and technical data

• SKU: A2228202926
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2228202926
• Substitutable numbers: A2228202926, A 222 820 29 26, A 223 900 12 00, A2239001200, KD
• Category: Horns

Application and Compatibility

The alarm siren is dedicated to Mercedes C-Class W204 and E-Class W212 models equipped with the manufacturer's factory alarm system. The component works with the vehicle's original wiring, ensuring full acoustic notification functionality upon correct installation in case of attempted break-in or unauthorized vehicle access.

As part of the Mercedes horns group, the siren has been designed for an appropriate volume level and sound characteristics, ensuring that alarm notifications are clear and easily audible in typical urban and parking environments.

Construction and Functional Parameters

The alarm siren is an electrical component that, upon receiving a signal from the alarm control unit, generates a distinctive, intermittent warning sound. The housing is designed for operation in the engine bay or other exposed areas, considering typical operating conditions in a passenger car.

This solution ensures:

• stable operation within the typical operating temperature range of the vehicle,
• adequate resistance to vibrations originating from the engine and chassis,
• compatibility with the factory alarm control system in Mercedes W204 and W212.

Benefits of Using an Original Alarm Siren

Using an original alarm siren to replace a damaged component ensures the integrity of the entire security system. This allows you to:

• avoid issues with incorrect impedance or improper current draw, typical of low-quality aftermarket parts,
• maintain the factory alarm sound characteristics,
• minimize the risk of communication errors with the vehicle's electronics.

For users seeking a sensible compromise between cost and quality, a used alarm siren offers a practical solution to restore the functionality of the security system without altering the original wiring.

Condition and Service Purpose

The offered alarm siren is a used part, sourced from disassembly, and is primarily intended for service applications: replacing a damaged component, post-accident repairs, or restoring the functionality of the factory alarm after a malfunction. This type of part is suitable for workshops specializing in the Mercedes brand as well as for knowledgeable users who service their vehicles themselves.

If you are planning comprehensive maintenance of the security system, it is advisable to combine the siren replacement with a check of the electrical wiring, connectors, and the correct configuration of the vehicle's alarm system.

Other Mercedes Horns and Used Parts Guide

If you are also looking for other Mercedes horns compatible with specific models of this brand, check out our offer at Mercedes horns, where you will find a wide selection of acoustic components for various vehicle generations. To better plan your purchases and make informed choices about used parts, consult our guide Used Parts – Your Guide to the Best Deals in the Automotive Store, where we discuss practical principles for selecting and using pre-owned components.