Mercedes SLK R172 Rear Left N/S Window Strip Moulding Seal Gasket A1726700738

Mercedes SLK R172 Rear Left N/S Window Strip Moulding Seal Gasket is a precisely fitted body component responsible for the seal and stable guidance of the side window in the SLK roadster. The original design ensures proper adhesion to the bodywork, reduces wind noise, and helps maintain acoustic comfort inside the vehicle. This is a practical solution for users who want to technically correctly restore the factory operating parameters of the rear left window.

Specifications and technical data

• SKU: A1726700738
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1726700738
• Substitutable numbers: A1726700738, A 172 670 07 38
• Location on the vehicle: Rear, Left
• Category: Car Glass

Purpose and function of the seal

The described outer seal works in the area of the rear left window, responsible for proper glass guidance and limiting the ingress of water and contaminants into the door interior and body zone. Thanks to a dedicated profile matched to the body lines of the SLK R172, the component works with the window lifting mechanism, maintaining a stable position of the glass while driving and during repeated opening and closing.

A properly selected seal helps minimize air turbulence at higher speeds, which is important for acoustic comfort in a convertible. Precise fitment also reduces the risk of rattling and squeaking in the area where the glass meets the bodywork.

Compatibility with the SLK R172 body

The component has been designed specifically for the rear side construction on the left side of the R172 generation SLK model. This means that the profile geometry, mounting points, and adhesion angle are adapted to the factory shape of the window frame and the side body line. Such a configuration allows for installation without interfering with the body structure, which is particularly important in cars with precisely designed aerodynamics.

By maintaining the original geometry, after replacing the seal, it is possible to reset the window according to factory tolerances, which translates into stable operation of the lifting mechanism and even pressure against other sealing elements.

Characteristics of the used component

The seal comes from dismantling, which in practice means that it is a part with parameters close to factory ones, but with natural signs of use. For many users, this is a favorable compromise between cost and maintaining the original vehicle specification. In the case of body components such as seals, using a used part often allows for a better fit than in the case of replacements with a universal profile.

Before installation, it is worth verifying the condition of the working surfaces, material flexibility, and the way it adheres to the glass and bodywork to ensure proper tightness and operating culture. Careful installation and correct seating in the mounting points are of key importance for the durability of the entire system.

Benefits of using an original seal

Using a dedicated rear left window outer seal in the SLK R172 allows you to:

• maintain proper tightness of the side zone and limit water ingress into the door structure,
• reduce wind noise and unwanted sounds in the window area at higher speeds,
• ensure correct window guidance throughout its entire range of operation,
• maintain the visual consistency of the side body line thanks to the matched profile.

For users planning a wider range of work on window and seal components, it may be helpful to browse the entire Car Windows category, available at the link: check which window and seal components are worth checking during body service.

Practical installation and maintenance tips

When replacing the seal, it is recommended to thoroughly clean the contact surface with the bodywork and check the condition of the window guides. Proper surface preparation facilitates the seating of the component and reduces the risk of future leaks. It is also worth paying attention to even pressure along the entire length of the profile to avoid local deformations.

If you are planning a wider modernization or refreshing your car and want to better plan the scope of work, the article TOP 10 most frequently replaced parts in your car may be helpful, where you will find practical tips regarding cost-effective replacement of consumables.