Mercedes W213 S213 Antenna Aerial Control Unit Keyless Go Entry A2139051100

Mercedes W213 S213 Antenna Aerial Control Unit Keyless Go Entry is an original component of the vehicle's comfort access system, designed for the E-Class W213/S213 generation models. This specialized antenna module works with the keyless entry and start system, ensuring stable communication between the key fob and the car's electronics. Thanks to its factory origin and well-thought-out design, it represents a reliable service solution for demanding users.

Specifications and technical data

• SKU: A2139051100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139051100
• Substitutable numbers: A2139051100, A 213 905 11 00
• Category: Antennas

Purpose and function of the Keyless Go antenna module

The presented antenna module is a component of the Keyless Go keyless access system in the Mercedes E-Class W213/S213. It is responsible for precisely receiving and transmitting radio signals between the key fob and the vehicle's control units, which enables opening, locking, and authorizing engine start without the need for a traditional key.

A properly functioning antenna module is crucial for:

• stable operation of the comfort entry function,
• correct recognition of the key fob in the vicinity of the vehicle,
• reducing Keyless Go system errors and "key not detected" messages.

Benefits of using an original Mercedes module

Choosing an original antenna module from the Car antennas group dedicated to the Mercedes W213/S213 allows you to maintain full compatibility with the factory electrical installation and vehicle software. This component has been designed for a specific electronic architecture, which minimizes the risk of problems with range, interference, or improper operation of the comfort system.

The most important advantages of using an original module include:

• consistency with the factory Keyless Go system – no need for installation modifications,
• antenna operating parameters properly matched to the W213/S213 body,
• preservation of safety functions provided by the manufacturer.

Operational characteristics and installation

The Mercedes W213 S213 Antenna Aerial Control Unit Keyless Go Entry is an electronic component intended for installation in a specific area of the body, in accordance with Mercedes service documentation. Thanks to factory connectors and mounts, the installation is straightforward, and after installation, the component works with the existing vehicle wiring harness. The product is offered in used condition, which allows for economical repair while maintaining original build quality.

Before installation, it is recommended to:

• verify the compatibility of the module with the specific vehicle equipment version,
• check the correct operation of the Keyless Go system after installation,
• perform any necessary adaptation or diagnostics using an appropriate service tester.

Application in service and comfort system diagnostics

The Mercedes W213 S213 Antenna Aerial Control Unit Keyless Go Entry will prove useful both as a replacement part in the event of a failure and during the diagnosis of problems with key fob range or unstable operation of the keyless system. Replacing a damaged module with a functional component allows you to quickly verify whether the source of the fault is the antenna part or another element of the comfort system. This is a practical solution for workshops specializing in Mercedes electronics and for users who want to restore full functionality of the Keyless Go system in their car.

If you are planning a comprehensive repair or upgrade of the comfort access zone in your Mercedes and need other elements from the same group, such as antenna modules, signal amplifiers, or keyless system receiver elements, check the available parts in the Mercedes car antennas category.

To better plan your purchases and efficiently collect all the necessary comfort system components in one place, it is worth reading the guide on our blog: Comprehensive supply: from the engine to the smallest clip – how to collect used car parts in one place. Additional tips on making an informed choice of parts from the secondary market are also provided in the article Used parts – your guide to the best offers in an automotive store, which will help you assess the cost-effectiveness of purchasing a used antenna module for a Mercedes.