Mercedes X166 Rear Seat Regulator Switch Control Button Left N/S A1668201210

Mercedes X166 Rear Seat Regulator Switch Control Button Left N/S is an original control element designed for operating seat adjustments in the rear of the vehicle. As a component from the Switches, control elements and ignition locks group, it ensures seamless operation with the factory electrical installation. This is a practical solution for users who want to restore full functionality to the rear seat in their Mercedes.

Specifications and technical data

• SKU: A1668201210
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1668201210
• Substitutable numbers: A1668201210, A 166 820 12 10
• Location on the vehicle: Rear, Right
• Category: Switches & Controls

Purpose and vehicle placement

The presented seat regulator button is designed for installation in the rear part of the cabin, on the left side of the vehicle. This placement allows for convenient control of the seat position by the rear passenger, while maintaining the ergonomics intended by the manufacturer.

Thanks to precisely selected geometry and connectors matched to the Mercedes installation, this element works with the factory seat adjustment system, enabling efficient restoration of electrical functions after replacing a damaged switch.

Function and role in the control system

The button acts as a local control module, transmitting signals to the seat adjustment system. It is responsible for:

• precise triggering of the seat adjustment mechanisms,
• maintaining consistent operation with other control elements in the cabin,
• intuitive operation of the seat position by the rear row passenger.

As an element from the Switches, control elements and ignition locks group, it has been designed to work with the vehicle's electrical system without the need for wiring modifications or additional adapters, provided the part selection matches the manufacturer's markings.

Benefits of using an original Mercedes component

Using an original seat regulator button in a Mercedes X166 allows you to maintain the visual and functional consistency of the interior. You receive:

• factory fitment to the side panel and rear seat upholstery,
• compatibility with the existing adjustment system without additional modifications,
• preservation of the seat operation ergonomics intended by the manufacturer.

The product is offered as a used part, which is a reasonable compromise between cost and maintaining the original vehicle specification. It is a practical solution for repairs where matching the specific equipment version is crucial.

Selection and vehicle integration

To ensure proper operation, the seat regulator button should be selected based on the manufacturer's markings and the equipment configuration of the specific Mercedes unit. Proper selection helps avoid electrical and mechanical compatibility issues and reduces installation time.

In the case of comprehensive work on cabin control systems, it is also worth paying attention to other elements from the same group, such as window control panels, comfort function switches, or ignition lock elements, to maintain the consistency of the entire system.

Related categories and guide materials

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

When performing service work on the vehicle, it is also worth ensuring the efficiency of the braking system – practical tips on safely selecting used components can be found in the article Second-hand braking system: how to safely choose discs, calipers, and ABS?.