Mercedes R172 Rear Door Window Seal Gasket Rubber Inner Left N/S A1726700338

Mercedes R172 Rear Door Window Seal Gasket Rubber Inner Left N/S is an original body component from the Window seals and trims group, designed for installation on the left side of the rear part of the vehicle. It ensures a tight window guide, reduces wind noise, and supports the proper operation of the lifting mechanism, which translates into more comfortable and stable operation of the Mercedes vehicle.

Specifications and technical data

• SKU: A1726700338
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1726700338
• Substitutable numbers: A1726700338, A 172 670 03 38, A1726700738, A 172 670 07 38
• Location on the vehicle: Rear, Left
• Part type: Inner Beltline Seal
• Category: Window Seals, Gaskets & Trims

Purpose and function of the seal

The presented seal is designed for installation in the rear, left area of the body, in the inner part of the door, where it is responsible for guiding and sealing the window. Its profile is matched to the geometry of the door in Mercedes R172 series models, which allows for precise adhesion to the glass edge and the door frame.

Thanks to a properly shaped working surface, the seal stabilizes the window during opening and closing, reduces vibrations, and minimizes the ingress of water and dirt into the door interior. Proper sealing of this area also helps to reduce noise at higher speeds, which improves cabin acoustics.

Benefits of using an original Mercedes seal

Using an original component from the Window seals and trims group ensures dimensional compatibility with the factory door construction. The appropriate hardness of the compound and the shape of the cross-section translate into proper window pressure and even distribution of forces in the guide.

• Better fit to the door frame and window compared to universal replacements.
• Stable operation of the window lifting mechanism thanks to proper guidance.
• Reduction of air drafts and noise in the rear part of the cabin.
• Support for protecting the door interior from moisture and dirt.

The element is intended for Mercedes vehicles, which facilitates the selection of parts for body repairs and restoring factory driving comfort parameters.

Installation characteristics and application

The seal works in the area of the rear, left door window, cooperating with the door frame and the lifting mechanism. When installed correctly, it ensures even pressure along the entire length of the window edge, which reduces the risk of jamming and accelerated wear of moving parts.

Due to its location in the rear part of the vehicle, a properly selected seal is important for:

• maintaining the tightness of the side body area,
• stability of the window operation when driving on uneven surfaces,
• reducing the phenomenon of window fogging from the inside.

The product comes from a Mercedes vehicle, which allows maintaining technical consistency with other door assembly elements.

Condition of the element and practical aspects

The seal is offered in used condition, which means it comes from disassembly but retains the functionality necessary for further operation. This type of solution is beneficial especially when repairing older vehicles, where it is important to combine reasonable costs with maintaining the original part specification.

Choosing a used seal for the rear, left door window allows for:

• maintaining factory fit without the need for door modifications,
• reducing repair costs while maintaining the manufacturer's standard,
• a visually and technically consistent effect after replacing the element.

Related elements and additional information

If you are planning a comprehensive repair or modernization of the side window area in your Mercedes and need other elements from the same group, such as additional guide seals, trim strips, or inner sealing profiles, check the available parts in the Mercedes Window seals and trims category.

When making decisions about using aftermarket elements in other vehicle brands, a guide material on selecting used components may be helpful – you can find more practical tips in the article Volkswagen – solidity and reliability. Why are used VW parts a reasonable choice?.