Mercedes W639 Rear Window Switch Control Button Left Right N/O/S A6396950457

Mercedes W639 Rear Window Switch Control Button Left Right is an original component from the Switches, controls and ignition locks category, designed for operating the electric rear windows in the vehicle. This used component ensures a factory fit, maintaining proper ergonomics and consistency with the rest of the cockpit elements.

Specifications and technical data

• SKU: A6396950457
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6396950457
• Substitutable numbers: A6396950457, A 639 695 04 57
• Location on the vehicle: Rear, Right, Left
• Category: Switches & Controls

Application and function in the vehicle

The described switch is dedicated for installation in the rear part of the vehicle, on the left or right side, allowing for convenient window control by passengers. The element is responsible for precisely transmitting the signal to the electrical system, enabling smooth raising and lowering of the window in accordance with the button movement.

Thanks to its factory design, the switch works with the original wiring harness, which promotes stable system operation and reduces the risk of compatibility issues. This is a practical solution when repairing the window control system in a Mercedes W639, especially when the existing button reacts with a delay, sticks, or has stopped working.

Construction and fitment for Mercedes

The switch has been designed specifically for the Mercedes brand, maintaining the appropriate shape, mounting points, and electrical connectors. As a result, it fits the factory door panel without the need for modifications, and the installation can be carried out in an orderly and repeatable manner.

The placement on the vehicle covers the rear part of the cabin on the right or left side, which allows the same type of element to be used in both rear doors. Such a solution facilitates service and part selection, and also helps maintain a consistent interior appearance.

Characteristics of the used component

The offered switch is a used component, which in practice means a favorable compromise between repair costs and maintaining original manufacturing quality. Such components come from disassembly and are frequently chosen for vehicle service where compliance with factory specifications and a reasonable repair budget are important.

Choosing an original switch from the secondary market allows you to maintain the consistency of the electrical system while reducing the risks typical of cheap replacements of uncertain origin. This solution is particularly recommended for repairs of cars used on a daily basis, where predictability and durability are key.

Benefits of using an original switch

• Factory fitment for the electrical system and door panel of the Mercedes W639.
• Can be used on the left or right side of the rear of the vehicle.
• Consistent interior appearance thanks to the original button styling.
• Reasonable repair cost due to the use of a used OEM component.

For many users, it is important that used Mercedes components can significantly reduce service costs while maintaining high quality. You can find more on this topic in the article Used parts for Mercedes – original components from disassembly, which discusses a practical approach to selecting such elements.

Expanding the control system in a Mercedes

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