Seat Module Mercedes C238 Front Right Seat Control Unit A2139008409

Visual condition of the part

The product shows signs of use visible in the photos.

Seat Module Mercedes C238 Front Right Seat Control Unit is a specialized component from the Electronic control modules and controllers category, responsible for precise management of the front passenger seat functions. A properly selected module allows for the restoration of full seat adjustment functionality, maintaining the factory comfort and safety standards characteristic of the Mercedes brand.

Specifications and technical data

• SKU: A2139008409-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139008409
• Substitutable numbers: A2139008409, A 213 900 84 09
• Location on the vehicle: Front, Right
• Category: ECUs & Computer Modules

Purpose and vehicle placement

The presented module is designed for installation in the front right seat area in Mercedes C238 and W213 series vehicles. It is responsible for handling the electronic seat functions in the front-right area, which is crucial for proper integration with the electrical system and other comfort controllers in the vehicle.

Thanks to its dedicated placement on the vehicle, the module works with the wiring harness and seat sensors, ensuring consistent operation of the adjustment system and communication with master control units.

Function in the Mercedes electronic system

As an element of the Electronic control modules and controllers category, the seat module acts as a local controller responsible for:

• controlling the electric motors for front passenger seat adjustment,
• processing signals from switches and position sensors,
• communicating with other vehicle controllers via the data bus,
• maintaining consistent comfort parameters in accordance with the Mercedes standard.

A properly selected seat controller allows for stable system operation, minimizing the risk of comfort system errors and warning messages on the instrument cluster.

Benefits of using the original module

Using a dedicated front right seat module in a Mercedes C238 / W213 primarily ensures:

• compatibility with the factory electrical architecture – the module is designed for a specific vehicle platform,
• stable cooperation with other comfort and safety controllers,
• preservation of the original seat adjustment logic,
• reduction of issues with connector matching and system configuration.

For the user, this means predictable seat operation, no need for installation modifications, and the maintenance of the driving comfort level characteristic of Mercedes.

Condition and service application

The module comes from the secondary market, making it a cost-effective solution while maintaining the manufacturer's original specifications. This type of component is particularly useful in situations where the vehicle experiences problems with passenger seat adjustment, controller communication errors, or the need to replace a damaged module after a collision or flooding.

In workshop practice, the module can be used both for standard repairs and for restoring full functionality of comfort equipment after interior upgrades or seat replacements.

If you are planning a comprehensive repair or upgrade of the seat comfort zone in your Mercedes and need other components from the same group, such as seat controllers, memory modules, or seat heating management units, check the available parts in the Electronic control modules and controllers Mercedes category.

For a better understanding of how important it is to use original controllers and modules in modern premium cars, it is worth reading an article describing the impact of factory components on the vehicle's character – you can find it here: Audi and emotions in their purest form – how used parts help maintain the brand's DNA.