Mercedes-Benz E-Class A207 W207 Convertible Air Module System Control Unit

Mercedes-Benz E-Class A207 W207 Convertible Air Module System Control Unit is an original component from the Electronic control modules and controllers group, designed for advanced management of the passive safety system in Mercedes A207/W207 class vehicles. This used airbag control unit ensures factory-spec operation logic for airbags and seatbelt tensioners, allowing for a technically correct system repair after a collision or the replacement of a damaged module. It is a solution for users and service centers that require compatibility with the factory installation and stable operation of the SRS system.

Specifications and technical data

• SKU: A2079014300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2079014300
• Substitutable numbers: A2079014300, A 207 901 43 00, KZ
• Category: ECUs & Computer Modules

Purpose and function of the airbag control unit

The presented module is responsible for the central control of the airbag and seatbelt tensioner system in the A207/W207 body style. It analyzes signals from crash sensors, controls igniter circuits, and monitors the integrity of the SRS installation. This ensures the vehicle maintains the manufacturer-intended airbag deployment scenario in various types of collisions, which is crucial for the safety of the driver and passengers.

The original controller from the Mercedes range is factory-matched to the electrical architecture of these models, which facilitates integration with other vehicle systems, such as the CAN network, instrument cluster, or comfort modules.

Benefits of using an original Mercedes module

Using an original airbag control unit instead of a damaged one allows you to maintain:

• Consistency with the factory configuration – maintaining SRS system operation logic in accordance with the manufacturer's design.
• Proper communication with other controllers in the vehicle – no issues with diagnostics and error reading.
• The ability for correct coding and adaptation based on the specific equipment of the car.

For workshops specializing in the Mercedes brand, this is a practical solution that reduces the risk of hardware or software incompatibility characteristic of aftermarket replacements of uncertain origin.

Product characteristics and condition

The module comes from a Mercedes vehicle and is an item from the Electronic control modules and controllers category. As a used part, it may show signs of wear typical of dismantled components, yet it retains the functionality required for further operation in the vehicle after proper installation and configuration.

The product has an assigned SKU inventory identifier and a dedicated OEM part number, as well as appropriate interchangeable numbers, which facilitates verification of compatibility with a specific body version and equipment level. Before purchasing, it is recommended to compare the parameters with the currently installed controller or consult a service center to confirm compatibility.

Selection, installation, and technical aspects

When selecting an airbag control unit for a Mercedes A207/W207, it is crucial to pay attention to:

• the compatibility of the part number and interchangeable numbers with the current controller,
• the body type and equipment configuration (number of airbags, curtains, tensioners),
• requirements regarding coding and potential crash data reset.

Installation should be performed by a qualified workshop, following safety procedures for SRS systems (disconnecting power, checking circuit resistance, verifying errors after installation). A correctly selected and coded module allows for the restoration of full airbag system functionality without interfering with the installation structure.

If you want to better understand how to safely select and install used controllers and other vehicle electronic components, check out our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Expanding the control system in a Mercedes

If you are planning a comprehensive repair or upgrade of the control electronics area in your Mercedes and need other components from the same group, such as comfort controllers, body modules, or safety system control units, check out the available parts in the Electronic control modules and controllers Mercedes category.

More on why used original components for premium cars are becoming an increasingly popular choice can be found in the article: Crisis in the new parts market? Why in 2026 used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend.

Summary

Mercedes-Benz E-Class A207 W207 Convertible Air Module System Control Unit is an original SRS system controller that allows for a technically correct repair of the safety system in vehicles of this series. Choosing a used, factory module with the appropriate markings is a way to maintain compliance with the manufacturer's design, reduce repair costs, and maintain full functionality of the airbag and seatbelt tensioner system.