Mercedes W251 Side Window Shielding Seal Gasket Strip Rear Left N/S A2516702139

Mercedes W251 Side Window Shielding Seal Gasket Strip Rear Left N/S is an original body component from the Window seals and trims category, designed for installation in the rear left part of the vehicle. It ensures a tight fit for the side window, limits the ingress of water and noise into the interior, and helps maintain stable operating conditions for the windows and upholstery elements. It is a practical solution for users who want to restore the proper sealing function in their Mercedes W251.

Specifications and technical data

• SKU: A2516702139
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2516702139
• Substitutable numbers: A2516702139, A 251 670 21 39
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and function of the seal

The presented seal is matched to the rear left side window of the Mercedes W251 body. Its task is to create a stable, flexible barrier between the glass and the bodywork, which limits phenomena such as leaks, air drafts, or unwanted window vibrations while driving.

A properly selected seal contributes to:

• maintaining adequate cabin tightness in the rear body area,
• reducing aerodynamic noise at higher speeds,
• protecting the window edge and paintwork from micro-damage resulting from bodywork movement.

Benefits of using an original seal

The original seal for this Mercedes series ensures proper fit to the window frame profile, which facilitates installation and reduces the risk of leaks after replacement. The component's design is tailored to the specific model, ensuring that the contact line with the glass and bodywork is consistent with the vehicle's factory standard.

Choosing such a component allows you to maintain:

• a consistent appearance of the window edge with other body elements,
• compatibility with factory guides and mounts,
• stable seating of the window in the rear left part of the vehicle.

Installation characteristics

The seal is intended for installation in the area of the rear left side window, which makes it easy to identify the correct installation location during service work. Thanks to the fit for a specific body model, it is possible to recreate the factory sealing line without the need for body or glass modifications.

When replacing, it is recommended to:

• thoroughly clean the contact surface of old seal residues and dirt,
• check the condition of the window edge and the window frame,
• verify the correct adhesion of the seal around the entire perimeter after installation.

Application in Mercedes vehicles

The seal was developed for the Mercedes W251 body, which means its geometry, cross-section, and routing are adapted to the specifics of this model. Such a fit promotes the maintenance of factory acoustic comfort parameters and protection of the interior against external factors.

For users who pay attention to technical and visual consistency of body elements, using an original seal is a solution that allows maintaining a standard close to the factory one, without compromises in terms of fitment.

Expanding the scope of service work

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

If you are considering a wider range of work on the vehicle and want to better plan the selection of used components, the article describing the differences between standard solutions and more dynamic suspension configurations may be helpful – you can find it here: Standard vs. sports suspension – design differences and selection of used parts.