Mercedes W166 Door Window Lifter Regulator Rear Right O/S Panel A1667300279

Mercedes W166 Door Window Lifter Regulator Rear Right O/S Panel is a component from the Window regulators and motors group, designed to control the movement of the window in the rear right door. It is responsible for the smooth raising and lowering of the window, ensuring ease of operation and proper functioning of the window mechanism in your Mercedes.

Specifications and technical data

• SKU: A1667300279-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667300279
• Substitutable numbers: A1667300279, A 166 730 02 79
• Location on the vehicle: Rear, Right
• Part type: Window Regulator
• Category: Window Motors & Regulators

Purpose and function of the window regulator

The presented window regulator is dedicated to the rear right side of the body in models from the Mercedes W166 family. Its task is to provide stable window guidance and transfer the drive from the control system to the window, ensuring its movement is predictable, even, and properly synchronized with the vehicle's electronics.

Thanks to its precise fit to the door structure, the regulator works with factory equipment, which reduces the risk of jamming, play, or excessive window vibration while driving. This solution is particularly important in everyday use when you frequently use the electric window controls.

Benefits of using an original Mercedes component

The window regulator designed for the Mercedes has been engineered to maintain the factory operating parameters of the window system. Proper fitment to the door geometry and correct operating characteristics translate into:

• consistent operation with factory window control switches,
• stable window guidance in the tracks,
• reduced load on other components of the window mechanism,
• maintenance of acoustic comfort inside the vehicle.

Using a component from the same design group as the original equipment helps minimize the risk of problems with window closing, incorrect positioning, or overloading of the electrical system.

Vehicle placement and installation aspects

The regulator is intended for installation in the rear right part of the body, within the passenger door. Such specific placement facilitates the selection of the correct component during repairs – especially in situations where the failure affects only one of the windows.

During replacement, it is recommended to:

• check the condition of the window tracks and door seals,
• verify the correct operation of the window control switch,
• inspect the electrical harness in the door for any mechanical damage.

This approach allows for restoring the proper operation of the entire window lifting system in the given door panel during a single service operation.

Product characteristics and practical application

As a component from the Window regulators and motors category, this window regulator works with the vehicle's window control system, being responsible for transferring torque from the drive to the window guidance mechanism. In practice, this means that after proper installation, the window should move smoothly, without jerking or stopping in intermediate positions.

The product is intended for users who want to restore full functionality to the rear right window in their Mercedes W166, maintaining compatibility with the vehicle's factory design and the operating parameters of the window system.

Service expansion and selection of related components

If you are planning a comprehensive repair or upgrade of the side window area in your Mercedes and need other components from the same group, such as lifting mechanisms, drives, or window controllers, check the available parts in the Mercedes window regulators and motors category.

While working on the window system, it is also worth paying attention to the general technical condition of the vehicle. If you are interested in the topic of typical engine failures in popular models and want to better plan your service budget, the following article may be helpful: BMW E90 faulty engines: check what can ruin your budget!.