Alarm Bracket Mercedes W639 W906 Anti Theft Siren Holder Mount A6398220040

Alarm Bracket Mercedes W639 W906 Anti Theft Siren Holder Mount is an original vehicle security system component designed for installation in Mercedes commercial models. The siren with the bracket works with the factory alarm, providing effective acoustic notification of a break-in attempt and stable mounting in the installation compartment. This is a solution for users who expect reliable integration with the vehicle's electronics and the preservation of factory alarm functionality.

Specifications and technical data

• SKU: A6398220040
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6398220040
• Substitutable numbers: A6398220040, A 639 822 00 40
• Category: Other Interior Parts & Accessories

Function and role in the alarm system

The siren with the bracket plays a key role in the anti-theft system – it generates a loud sound signal upon detection of unauthorized vehicle opening or a breach of its protection zones. Using an original component allows for maintaining:

• proper cooperation with the central alarm module,
• the appropriate volume level and sound characteristics,
• compatibility with factory settings of Mercedes electronics.

Thanks to the dedicated bracket, the element is stably seated in the body, which reduces vibration transmission and minimizes the risk of mechanical damage during operation.

Compatibility with Mercedes vehicles

The offered alarm siren has been designed for Mercedes commercial vehicles, where maintaining consistency with the factory security system is essential. Using an original solution facilitates:

• trouble-free connection to the existing electrical harness,
• maintaining full alarm functionality after replacing the element,
• reducing the risk of diagnostic errors in the comfort and security system.

This is particularly important in commercial vehicles, where the reliability of the anti-theft system translates into cargo safety and fleet operational continuity.

Characteristics of the used element

The alarm siren with the bracket comes from dismantling, which means it is a used element, yet it retains the functionality required for further operation. In practice, this means:

• factory fitment to mounts and connectors in the vehicle,
• preservation of the original acoustic design,
• possibility of installation as a replacement for a damaged siren without interfering with the installation.

For many commercial vehicle users, this is a reasonable compromise between cost and maintaining the manufacturer's original specifications.

Benefits of using an original alarm siren

Using an original siren with a bracket in a Mercedes alarm system allows for maintaining the consistency of the entire security setup. The most important advantages include:

• reliable cooperation with vehicle electronics – no need for adaptation or installation modifications,
• maintaining factory alarm operating parameters,
• easier diagnostics in case of potential faults,
• proper mechanical and electrical fitment to the specific vehicle platform.

Such a solution is particularly beneficial for workshops specializing in servicing Mercedes vehicles and users who want to keep the vehicle in a configuration close to the factory state.

Expansion of the security system and related elements

If you are planning a comprehensive repair or upgrade of the electronic security zone in your Mercedes and need other elements from the same group, such as additional alarm modules, tilt sensors, or interior motion sensors, check the available parts in the Other Mercedes category.

For users interested in comparing solutions used in different brands and vehicle segments, including high-performance models, an article discussing design differences in powertrains and chassis may be helpful – details can be found in the entry Audi RS vs other models – what is hidden under the hood and chassis?.

If you are considering installing a component from dismantling and want to better understand the specifics of such solutions, it is worth reading the guide on the secondary market – more information can be found in the article Used car parts: Myths and facts you need to know.