Mercedes C238 Window Gasket Seal Rear Left N/S Rubber Weatherstrip A2386730500

Mercedes C238 Window Gasket Seal Rear Left N/S Rubber Weatherstrip is an original body component from the Window seals and trims category, designed for installation in the rear left section of the vehicle. It ensures a tight fit for the window, reduces wind noise, and supports the proper operation of the window mechanism, which translates into acoustic comfort and protection of the interior against moisture.

Specifications and technical data

• SKU: A2386730500
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2386730500
• Substitutable numbers: A2386730500, A 238 673 05 00
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and function of the window seal

The presented seal is designed for installation in the rear window area on the left side, for the C238 body type. It is responsible for stable window guidance, proper sealing of the contact point between the glass and the bodywork, and the reduction of vibrations while driving.

Thanks to a properly selected profile and material flexibility, this component:

• limits the ingress of water and contaminants into the door interior and cabin,
• reduces wind noise at higher speeds,
• supports the smooth operation of the window lifting and lowering mechanism,
• stabilizes the window in the guides, which affects the durability of the entire system.

Benefits of using an original Mercedes seal

Using an original seal in the C238 model allows for maintaining the factory fit of body components. The shape, hardness, and geometry of the profile are matched to the specific door construction, ensuring that installation is predictable and the final result is consistent with the manufacturer's specifications.

Key advantages of this solution include:

• precise fit to the shape of the window frame – without the need for modifications or cutting,
• stable seating in factory mounting points,
• preservation of the aesthetic contact line between the glass and the bodywork,
• reduction of the risk of rattling, squeaking, and leaks after installation.

Installation characteristics and condition of the component

The seal is intended for installation in the rear – left side of the vehicle area, which makes it easy to assign it to a specific position on the body. The design is based on the factory Mercedes blueprint, allowing the component to work with original window guides and door fittings.

The product is offered as a used part, which allows for an economical replacement while maintaining compatibility with the factory solution. Before installation, it is recommended to perform a standard inspection of the seal surface and mounting sockets in the door to ensure proper positioning and tightness after installation.

Application in service practice

Replacing the window seal on the rear left side is recommended in situations where the following occur:

• noticeable drafts in the window area while driving,
• traces of moisture or streaks in the lower part of the door upholstery,
• excessive play of the window in the guides,
• visible cracks, deformations, or dry rot of the rubber.

Selecting the component according to the manufacturer's markings helps avoid compatibility issues and shortens service time, which is important both in professional workshops and for DIY repairs.

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

For a broader perspective on the cost-effectiveness of using aftermarket components in vehicle systems, including the principles of selection by manufacturer markings and cost analysis of repairs, it is worth reading the guide Why it is worth buying used gearboxes and engines – facts instead of myths, which organizes the most important issues related to used components.