Window Frame Mercedes ML W166 Rear Door Trim Guide Black Right O/S A1667370280

Visual condition of the part

The product shows signs of use visible in the photos.

Window Frame Mercedes ML W166 Rear Door Trim Guide Black Right O/S is a precision body component from the Window seals and trims group, designed for the rear side area of the vehicle. It ensures stable window guidance, proper sealing, and an aesthetic finish to the door edge, which translates into acoustic comfort and the correct operation of the window lifting mechanism.

Specifications and technical data

• SKU: A1667370280
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667370280
• Substitutable numbers: A1667370280, A 166 737 02 80
• Location on the vehicle: Rear, Right
• Color: Black
• Category: Window Seals, Gaskets & Trims

Purpose and function of the component

The window frame, cover, and guide in the rear door are responsible for the stable vertical guidance of the glass pane, limiting its operational play, and protecting against vibrations while driving. In combination with perimeter seals, it creates a tight guide channel that:

• minimizes cabin noise caused by airflow,
• limits the ingress of moisture into the door interior,
• supports the correct operation of the window regulator,
• stabilizes the window at higher speeds and on uneven surfaces.

The component is matched to the rear part of the body on the passenger side, which guarantees the correct geometry of the window guidance and compatibility with the factory door construction in the ML W166 model.

Construction, color scheme, and integration with the body

The design of the guide has been engineered for rigidity and resistance to deformation resulting from door operation and temperature changes. The black color ensures visual consistency with the factory window frame trim elements, masking any potential shade differences between the glass, seals, and decorative trims.

The profile of the element is matched to the shape of the ML W166 door, which facilitates installation and allows for the correct positioning of the window in the body plane. This maintains an even gap between the glass and the seals, which is important for both aerodynamics and protection against water and noise.

Performance and installation characteristics

As a part from the Window seals and trims group, the guide works with other window frame elements to create a complete guiding and sealing system. In practice, this means:

• smoother operation of the window lifting and lowering mechanism,
• reduced risk of jams resulting from improper glass guidance,
• better protection of the door interior against corrosion caused by water and contaminants,
• maintenance of factory acoustic comfort in the rear part of the cabin.

The element is intended for Mercedes vehicles, which helps maintain the original body geometry and compatibility with factory door components.

Condition, selection, and service application

The part comes from the segment of used body components, which allows for an economical repair of the window system while maintaining proper fit to the door structure. This is particularly important when replacing after a collision, mechanical damage to the guide, or problems with the window closing correctly.

When selecting the component, it is worth paying attention to the compatibility with the ML W166 body version and the installation side to ensure correct cooperation with the existing window lifting mechanism and door frame seal.

Expansion of the sealing and guide system

If you are planning a comprehensive repair or upgrade of the window area in your Mercedes and need other elements from the same group, such as additional guides, trim strips, or perimeter seals, check the available parts in the Mercedes window seals and trims category.

For drivers interested in comparing technical solutions in sports versions of cars, including body, chassis, and braking system construction, an article describing the differences between RS series and standard models may be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.