Mercedes SLK R172 Rear Left Window N/S Strip Moulding Seal Gasket A1726700138

The Mercedes SLK R172 Rear Left Exterior Window Seal is a precisely fitted body component designed for the rear left window of the R172 generation SLK roadster. It ensures a watertight seal between the window and the car body, enhancing protection against water, noise, and air turbulence, while also supporting the stable operation of the window mechanism.

Specifications and technical data

• SKU: A1726700138
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1726700138
• Substitutable numbers: A1726700138, A 172 670 01 38
• Location on the vehicle: Rear, Left
• Category: Car Glass

Purpose and Function of the Seal

The offered seal is a part from the Automotive Glass category, specifically designed for installation on the rear left window of the Mercedes SLK R172 model. Its functions include:

• limiting the ingress of water and moisture into the door interior and cabin,
• reducing wind noise at higher speeds,
• stabilizing the window's movement within its guide,
• protecting the window edges from minor mechanical damage.

Thanks to its precise profile, the seal integrates seamlessly with the vehicle's original body geometry, ensuring a secure seal around the rear window area and improving cabin acoustics.

Compatibility and Fit for Mercedes SLK R172

This seal has been developed as a dedicated component for this specific model, guaranteeing:

• factory-perfect fit to the shape of the rear left window frame,
• proper interaction with the window lifting and lowering mechanism,
• a cohesive appearance with other exterior trim elements.

Its placement, specified as rear – left side, eliminates the risk of selecting the wrong part and simplifies service planning for the side windows on the SLK R172.

Characteristics of a Used Part

The offered seal is a used part, which translates to significant cost savings while retaining the original geometry and material characteristic of genuine Mercedes equipment. Such components are particularly useful for:

• repairs following collisions or bodywork in the rear section of the vehicle,
• addressing leaks and water ingress around the rear left window,
• reducing cabin noise after a window replacement or window mechanism adjustment.

Using an original seal from a dismantled vehicle helps maintain visual and material consistency with other body components, which is crucial for premium-class vehicles.

Benefits of Installing This Seal

Installing the rear left exterior window seal on a Mercedes SLK R172 offers tangible operational benefits:

• improved sealing in the rear cabin area,
• reduced risk of corrosion within doors and sills due to better water drainage,
• more stable window operation with frequent opening and closing,
• maintenance of the aesthetic line of the vehicle's side profile.

For SLK R172 owners who prioritize body condition and driving comfort, replacing a worn-out seal with a functional used part is a practical and economical service solution.

Related Products and Technical Knowledge

If you are planning comprehensive window servicing for your roadster and are also interested in other glazing-related components for this model, such as trim strips or additional seals, explore the available parts in the Mercedes Automotive Glass category.

To compare design solutions used across different brands and segments, and to gain a better understanding of how manufacturers develop body and glazing components for sports hatchbacks, it is worth reading the article Hot Hatch Legend: The Evolution of the VW Golf GTI from Mk1 to Mk8 – Design Changes and VW Car Parts, which showcases a practical approach to modernization and the selection of used parts.