Mercedes X164 Rear Window Left Cover Moulding Strip Seal A1646700387

Mercedes X164 Left Rear Window Seal Trim Strip is a precisely fitted body element from the Protective and Decorative Trim Strips group, designed for installation on the left side of the rear window. It is responsible for ensuring a tight seal along the window edge and providing an aesthetic finish to the rear of the vehicle, ensuring stable mounting and a cohesive vehicle appearance.

Specifications and technical data

• SKU: A1646700387
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1646700387
• Substitutable numbers: A1646700387, A 164 670 03 87
• Location on the vehicle: Rear, Left
• Color: Black
• Category: Body Mouldings & Trims

Purpose and Function of the Element

The cover, trim strip, and rear window seal in one component performs several key structural tasks: guiding the window edge, preventing dirt from entering the space between the window and the body, and stabilizing the window-to-body connection. Its placement on the rear left side allows for precise fitting to the body lines characteristic of the X164 series, contributing to visual consistency and correct window adhesion.

This element belongs to the group of body finishing components that influence both the protection of the window edge and the reduction of potential stresses at the point of contact between the glass and the body. This reduces the risk of unwanted noises, play, and leaks in the rear of the vehicle.

Construction, Color, and Fit

The trim strip is designed as a component mounted in the rear window area on the left side, with a geometry adapted to the factory body profile. The black color provides a neutral, technical finish that integrates well with both dark and lighter body paints, without disrupting the vehicle's styling lines.

As an element from the Protective and Decorative Trim Strips group, the part serves both protective and aesthetic functions: it shields the window edge from minor mechanical damage and visually tidies the connection between the glass and the body. The design intended for a specific model from the Mercedes X164 family allows for installation without the need for shape modifications or additional adjustments.

Performance Characteristics and Installation Benefits

As a body element intended for the rear left side, the trim strip-seal contributes to the comfort of vehicle operation in daily use. When correctly installed:

• it stabilizes the edge of the rear window in the left area,
• it limits the ingress of dirt into the contact zone between the window and the body,
• it visually tidies the side and rear lines of the body,
• it reduces the risk of unwanted noises resulting from body flex.

The used condition allows for an economical replacement of a damaged or worn element while maintaining the original geometry and fit characteristic of the Mercedes brand. This is a practical solution when the existing trim strip is cracked, deformed, or has lost its functional properties.

Application in Service and Body Repairs

Replacing the left rear window trim strip-seal is a typical operation during accident repairs, bodywork and painting, or when reseating the window after its removal. Using a dedicated element for the X164 series facilitates the maintenance of factory gaps and body lines, which is important for both aesthetics and the correct distribution of stresses around the window.

In service practice, it is particularly important that a component of this type is correctly matched to the specific model and its placement on the vehicle. This makes the installation process smoother and reduces the risk of requiring additional adjustments.

If you are planning a comprehensive repair or upgrade of the rear window finishing area on your Mercedes and need other elements from the same group, such as covers, overlays, or additional trim strips, check the available parts in the Mercedes Protective and Decorative Trim Strips category.

For users interested in a broader context of selecting used OEM parts and the impact of the correct component on vehicle handling, an article comparing solutions in sports constructions may be helpful – you can find it here: Go-Kart Feeling XXL: Used N18 Turbocharger vs. B48 – What to Choose for a Mini Cooper S?.