Radio Remote Alarm Mercedes W203 W204 W210 W211 W220 Key Fob Button A2037664906

Radio Remote Alarm Mercedes W203 W204 W210 W211 W220 Key Fob Button is an original vehicle security system component designed for selected Mercedes models. It enables convenient control of the central locking and alarm system, and thanks to its factory design, it ensures proper integration with the car's electronics once correctly programmed.

Specifications and technical data

• SKU: A2037664906
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2037664906
• Substitutable numbers: A2037664906, A 203 766 49 06, BG
• Category: Other Interior Parts & Accessories

Purpose and function of the alarm key fob

The presented alarm key fob is a security system component used in popular Mercedes generations, such as the W203, W204, W210, W211, and W220. Its purpose is to remotely control vehicle comfort and security functions, including central locking operation as well as alarm activation and deactivation, depending on the specific vehicle configuration.

Thanks to its factory design, the key fob works with original comfort and alarm modules, which, after proper matching and coding, allows for maintaining the integrity of the security system and consistent operation with other vehicle electronic components.

Benefits of using an original alarm key fob

Using an original alarm key fob in a Mercedes offers a number of practical benefits:

• maintaining compatibility with the factory immobilizer and alarm system,
• proper cooperation with comfort modules and central locking,
• possibility of professional matching to a specific car by a specialized service,
• consistent operation of remote functions in accordance with the factory vehicle configuration.

By choosing an original alarm key fob for Mercedes, you minimize the risk of electronic communication issues, which is important for both safety and daily driving convenience.

Product characteristics and condition

The offered alarm key fob comes from a Mercedes vehicle and is a secondary market component. This means it has been previously used, but it can still be effectively utilized after proper preparation and coding at a specialized automotive electronics service center.

Before installation, it is recommended to verify compatibility with the specific vehicle model and consult with a professional who will select the appropriate programming procedure. This approach allows you to fully utilize the potential of the key fob and ensure stable operation of the security system.

Application in service practice

This type of alarm key fob is often used in:

• cases of loss or damage to the existing key,
• expanding the set of keys with an additional unit,
• service work related to the replacement of comfort or alarm modules.

For workshops specializing in automotive electronics, it serves as a useful base for programming and matching to a specific car, which allows for optimizing repair costs compared to purchasing a brand-new set.

Related components and product category

If you are planning a comprehensive repair or upgrade of the security and comfort zone in your Mercedes and need other elements from the same group, such as additional remotes, control modules, or alarm system accessories, check out the available parts in the Other Mercedes category.

More about the cost-effectiveness of used parts

When choosing secondary market components, it is worth analyzing the cost-to-functionality ratio and the differences between original parts, replacements, and used items. You may find the comparison prepared in our guide helpful: original, replacement, or used car parts – what to choose, where you will find practical tips on component selection and matching by OEM numbers.

Additionally, if you are interested in comparisons of technical solutions in sports versions of cars and standard models, you can read the article Audi RS vs other models – what is hidden under the hood and chassis, which discusses the differences in engine, brake, and chassis construction, helping to better understand the importance of proper part selection in modern cars.