Mercedes C238 A238 Seat Heating Control Switch Button Right O/S A2139050804

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes C238 A238 Seat Heating Control Switch Button Right O/S is an original control component designed for the passenger-side seat comfort system in Mercedes vehicles. It allows for precise management of the seat heating function while maintaining factory ergonomics, a consistent cockpit appearance, and proper compatibility with the vehicle's electrical system.

Specifications and technical data

• SKU: A2139050804
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139050804
• Substitutable numbers: A2139050804, A 213 905 08 04
• Location on the vehicle: Right
• Category: Switches & Controls

Function and application of the seat heating button

The presented button belongs to the Switches, control elements and ignition locks group and is responsible for operating the seat heating on the right side of the vehicle. As a dedicated control module, it ensures:

• intuitive switching of the seat heating function on and off,
• stable cooperation with the factory comfort system,
• preservation of the original logic of the electrical system operation.

Thanks to its precise fit for the right-hand mounting position, this component allows for the restoration of full control panel functionality without the need for modifications to the installation or interior.

Construction and integration with the Mercedes interior

The seat heating control button has been designed for consistency with the dashboard and center console of the Mercedes. The appropriate housing profile and factory mounts facilitate installation in the designated spot, while the matched color scheme and pictograms ensure aesthetic integration with other control elements.

Original electrical connectors allow for a near plug-and-play connection, which minimizes the risk of installation errors and eliminates the need for wiring modifications. This ensures proper communication with comfort modules and other components responsible for interior equipment control.

Benefits of using an original used component

Choosing a used, original seat heating button for a Mercedes allows you to combine cost control with the preservation of factory build quality. Such components are designed for long-term operation, and their construction is adapted to the specific requirements of the electrical installation and interior architecture of a given model.

The original switch from this group ensures:

• proper fit to the control panel,
• compatibility with safety and comfort systems,
• consistent appearance with other buttons in the cabin.

For many users, this is a technically sound way to restore full seat heating functionality without the need to invest in a new part.

Mounting zone and service aspects

The placement of the button on the right side of the vehicle requires the use of a precisely matched component to maintain proper fitment with the panel and the correct orientation of markings. In service practice, this means shorter installation time, lower risk of damage to trim elements, and easier diagnostics in the event of previous seat heating system failures.

Due to its classification within the control group, this element is significant not only for comfort but also for the proper operation of electronic systems responsible for interior equipment. Replacing it with the correct, original switch is the recommended solution in case of damage due to mechanical wear or malfunction of the existing button.

If you are planning a comprehensive repair or upgrade of the cockpit and center console area in your Mercedes and need other elements from the same group, such as function buttons, light switches, or comfort control elements, check out the available parts in the Mercedes Switches, control elements and ignition locks category.

To better plan your repair and make an informed choice regarding original dismantled components, it is worth checking out the guide on our blog: Used parts for Mercedes – original components from dismantling, where we discuss the practical aspects of selecting and using such elements.