Mercedes C238 Switch Seat Regulation Door Adjustment Front Right O/S A2139059803

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes C238 Switch Seat Regulation Door Adjustment Front Right O/S is an original control component from the Switches, control elements and ignition locks group, designed for installation in the front right door. It allows for precise control of the driver or passenger seat settings, ensuring convenient operation of all functions from the door panel. This solution is dedicated to users who expect consistency with the factory ergonomics of the Mercedes interior.

Specifications and technical data

• SKU: A2139059803
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139059803
• Substitutable numbers: A2139059803, A 213 905 98 03
• Location on the vehicle: Front, Right
• Category: Switches & Controls

Function and application of the seat adjustment switch

The switch is responsible for controlling the electric seat adjustment located at the front right door. It enables convenient adjustment of the seat position to the user's height and preferences directly from the door trim, without the need to reach for other control panels.

The component has been designed specifically for Mercedes vehicles, which translates into matched geometry, appropriate mounting points, and compatibility with the electrical system of the C238 body model. Visual consistency with other cockpit elements is maintained, as well as the button operation logic characteristic of this brand.

Construction and integration with the vehicle's electrical system

The switch is mounted in the front right door, in the location provided by the manufacturer. The panel design allows for stable seating in the door upholstery, and the electrical connectors are prepared to work with the original wiring harness, which facilitates installation and reduces the risk of installation errors.

The component belongs to the Switches, control elements and ignition locks group, which is why it is designed for frequent use – the buttons are adapted to multiple work cycles, and the construction ensures appropriate resistance to typical loads in the door (vibrations, temperature changes, daily use).

Benefits of using an original Mercedes switch

Using an original seat adjustment switch in a Mercedes C238 allows you to maintain full functionality of the seat adjustment system and avoid problems typical of replacements. Key advantages include:

• reliable cooperation with the vehicle's factory electronics,
• correct operation of all seat adjustment directions,
• consistent appearance with other interior elements,
• ergonomic button layout in accordance with Mercedes standards.

As a used component, the switch represents a reasonable compromise between cost and functionality, allowing you to restore the efficiency of the seat adjustment system without the need to invest in a new part.

Placement in the vehicle and installation aspects

The switch is intended for installation in the front right door, which is important both in terms of mechanics and electronics. Proper placement ensures:

• easy access to seat controls for the user sitting on the right side,
• compliance with factory electrical wiring routing in the door,
• proper fit with the door upholstery panel.

When replacing, it is recommended to follow service procedures typical for door control elements, including careful handling of latches and connectors so as not to damage the upholstery or the installation.

If you are planning a comprehensive repair or upgrade of the door control zone in your Mercedes and need other elements from the same group, such as window switches, door lock buttons, or additional control modules, check the available parts in the Mercedes Switches, control elements and ignition locks category.

Used original Mercedes parts – why it's worth it

Choosing a used, original seat adjustment switch is a way to maintain the high standard of Mercedes equipment at controlled service costs. Original components are designed for long-term operation, and their parameters are adapted to specific comfort systems in a given model.

If you want to learn more about the advantages of using original dismantled parts in cars of this brand, read the article Used parts for Mercedes – original parts from dismantling, which discusses the practical aspects of selecting and operating such components.