Mercedes A B Class W169 W245 Horn Warning Alarm Siren Holder Cover A1695457040

Mercedes A B Class W169 W245 Horn Warning Alarm Siren Holder Cover is an original component from the Horns category, designed for factory security systems in Mercedes A-Class W169 and B-Class W245 models. This used siren ensures proper compatibility with the vehicle's electrical system, maintaining the characteristic acoustic parameters and operating logic specified by the manufacturer.

Specifications and technical data

• SKU: A1695457040
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1695457040
• Substitutable numbers: A1695457040, A 169 545 70 40, AS
• Category: Horns

Purpose and function in the vehicle

The alarm siren in Mercedes W169 and W245 models is responsible for generating an audible signal in the event of a breach of the vehicle's protected zones. It is integrated with the factory alarm system, which allows it to:

• respond to signals from door, trunk, and hood sensors,
• work in conjunction with the central locking system and the comfort module,
• provide a consistent, recognizable sound in accordance with Mercedes brand standards.

By maintaining the original design, the siren preserves the appropriate volume level and operating characteristics, which translates into effective deterrence of potential intruders.

Construction and system compatibility

The alarm siren from this series is designed as a component that works with the vehicle's electronics according to OEM standards. This means that it:

• communicates with the electrical system in accordance with factory protocols,
• is adapted for installation in the location specified by the manufacturer,
• features properly matched connectors, which facilitates connection to the wiring harness.

This solution minimizes the risk of communication errors with control modules and eliminates problems typical of non-original replacements.

Benefits of using an original alarm siren

Using a pre-owned, original alarm siren in a Mercedes W169 or W245 is a reasonable compromise between cost and quality. Key advantages include:

• Full integration with Mercedes electronics – no need for wiring modifications or additional adapters.
• Appropriate acoustic characteristics – sound consistent with factory settings, without weak or unnatural tones.
• Stable operation within the alarm system – correct signal triggering in alarm situations and seamless cooperation with comfort functions.

By choosing an original component from the Horns category, you reduce the risk of compatibility issues that often arise with universal sirens.

Condition, installation, and service application

The alarm siren is offered as a used part, which allows for an economical repair of the security system without sacrificing the manufacturer's original specifications. This type of component is particularly useful in situations where:

• the factory siren has stopped responding to alarm arming,
• there are alarm system errors related to the lack of an audible signal,
• replacement is necessary due to water damage or mechanical failure.

When properly matched to the specific vehicle configuration, installation usually involves replacing the component and connecting it to the existing harness, followed by a potential functional verification via diagnostics.

If you are planning a comprehensive repair or upgrade of the audible signaling zone in your Mercedes and need other components from the same group, such as additional horns, control modules, or acoustic installation parts, check out the available parts in the Mercedes Horns category.

If you are interested in the broader context of using original pre-owned parts in premium cars and want to better understand how to optimize service costs without sacrificing quality, it is worth reading the article Luxury within reach – how to service a Porsche legend using proven pre-owned parts, which discusses a practical approach to selecting components from dismantling.