Mercedes W164 W204 Estate W211 Radio Remote Alarm Key Fob Button A2049051704

Mercedes W164 W204 Estate W211 Radio Remote Alarm Key Fob Button is an original item from the Switches, control elements and ignition switches group, designed for operating the central locking, alarm, and radio functions in selected Mercedes models. The product is offered in for parts or not working condition, making it a valuable base for sourcing components, service testing, or specialized refurbishment.

Specifications and technical data

• SKU: A2049051704-2
• Mark: Mercedes (Genuine OE)
• Condition: For parts or not working
• OEM Part Number: A2049051704
• Substitutable numbers: A2049051704, A 204 905 17 04
• Category: Switches & Controls

Purpose and function of the Mercedes key fob

The presented key fob is a component of the comfort control system in Mercedes W164, W204, and W211 class vehicles. In a typical configuration, this type of remote is responsible for:

• remote control of the central locking system,
• operation of the factory alarm,
• cooperation with the ignition authorization system and ignition switch,
• integration with the vehicle's radio system.

Thanks to its factory design, the key fob is matched to the electrical and electronic architecture of Mercedes, which facilitates its use as a donor for parts or as training material in workshops specializing in automotive electronics.

Service application and usage possibilities

Due to the condition specified as for parts or not working, the key fob can be used primarily as:

• a source of housing, buttons, or mechanical components,
• material for soldering practice and electronic circuit diagnostics,
• a base for comparative analysis of electronics during the repair process of other remotes,
• a component for educational projects related to immobilizer and remote control systems.

This type of item is particularly useful for service centers dealing with key programming, automotive electronics, and the refurbishment of remotes in premium class cars.

Benefits of choosing an original Mercedes component

The original key fob from the Mercedes range ensures structural compatibility with the manufacturer's factory solutions. For workshops and electronics technicians, this means:

• reliable compatibility with the electrical architecture of specific vehicle generations,
• the ability to accurately map paths, circuits, and components on the board,
• easier identification of differences between successive versions of remotes,
• better preparation for current repairs of units used by customers.

Choosing an original element from this group also facilitates the creation of service documentation and repair procedures, which translates into more predictable work results.

Product condition and usage recommendations

The key fob is offered in for parts or not working condition, which means it should not be treated as a ready-to-use replacement for direct use in a vehicle. Recommended applications include:

• sourcing selected mechanical components or the housing,
• damage analysis for training purposes,
• use as a design reference when repairing other remotes.

Before any attempt to restore functionality, detailed electronics diagnostics and verification of compatibility with the specific vehicle configuration are necessary.

Expanding the control system in Mercedes

If you are planning a comprehensive repair or upgrade of the comfort control zone in your Mercedes and need other elements from the same group, such as button modules, ignition switch elements, or additional switches, check the available parts in the Mercedes switches, control elements and ignition switches category.

Substantive support and knowledge about used Mercedes parts

For users and workshops that want to consciously use premium-class used components, we recommend an article describing the practical aspects of selecting and operating original dismantled parts. More information can be found in the material: Used parts for Mercedes – original components from dismantling.

If you work with vehicles from the 1998–2012 model years and are interested in a broader context of using used parts in refreshing youngtimer cars, you will also find useful information in the guide: The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model years.