Door Switch Mercedes W204 W212 W218 Seat Regulation Front Right O/S A2128700558

Front seat adjustment switch, right, for Mercedes W204, W212, W218 is an original part from the Switches, controls, and ignition group, designed for installation in the driver or passenger seat area on the outer side. This used component ensures factory control logic, proper fit with upholstery, and compatibility with the Mercedes vehicle's electrical system.

Specifications and technical data

• SKU: A2128700558
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2128700558
• Substitutable numbers: A2128700558, A 212 870 05 58, KZ
• Location on the vehicle: Front, Right
• Category: Switches & Controls

Vehicle Application and Function

The offered switch is dedicated to Mercedes C-Class (W204), E-Class (W212), and CLS (W218) models and operates in the front seat area on the right side of the vehicle. It is responsible for controlling the electric adjustment of the seat, backrest, and any additional movement directions, depending on the specific car configuration.

Thanks to its factory design, the following are maintained:

• correct cooperation with Mercedes comfort modules and electrical system,
• ergonomic placement of buttons on the seat bolster,
• visual consistency with other control elements in the interior.

Construction and Mounting Fit

The seat adjustment switch is designed as an integrated element on the outer side of the seat. The construction anticipates a specific placement on the vehicle, at the front right, which facilitates installation and minimizes the risk of incorrect connection.

Key mounting features:

• original housing geometry matched to the seat upholstery,
• electrical connectors prepared for the factory Mercedes wiring harness,
• button layout consistent with the factory control scheme.

This allows the part to be used both as a replacement for a damaged switch and as part of restoring full seat functionality after interior repairs.

Benefits of Using an Original Switch

Choosing an original seat adjustment switch for a Mercedes offers tangible operational benefits. The part comes from disassembly, allowing for the preservation of factory specifications without the need for aftermarket replacements with uncertain parameters.

• Full Electrical Compatibility – proper communication with the vehicle's electrical system and comfort modules.
• Ergonomic Consistency – identical button layout and travel as in the original equipment.
• Stable Long-Term Operation – construction designed to meet Mercedes-Benz requirements.

This solution is particularly beneficial for repairs where maintaining the original interior character and correct operation of all seat adjustment functions are crucial.

Condition and Application in Service and Interior Refurbishment

The offered switch is a used part, which in service practice allows for economical repair of the seat adjustment system while maintaining original quality of workmanship. It is suitable for workshops specializing in the Mercedes brand as well as professional facilities engaged in the renovation of premium car interiors.

The switch can be used, among other situations, in cases of:

• mechanical or electrical damage to the existing seat controller,
• restoring full functionality after a collision or interior flooding,
• completing equipment during seat or upholstery replacement.

To better plan repairs using original disassembled parts, it is worth reading the guide on our blog: Used Mercedes Parts – Original Disassembled Components.

Expanding Control Systems in Mercedes

When working on seat adjustment systems and other interior control elements in a Mercedes, it is worth considering the entire system. If you are planning a comprehensive repair or upgrade of the cockpit area and control panels in your Mercedes and need other parts from the same group, such as window switches, mirror adjustment knobs, or additional control modules, check the available parts in the Mercedes Switches, Controls, and Ignition category.