Mercedes Vito Viano W639 Rear Window Sealing Frame Gasket A6396712520

Mercedes Vito Viano W639 Rear Window Sealing Frame Gasket is an original body component designed for the rear part of the vehicle, ensuring a tight and stable window fitment. Thanks to the factory-spec fitment for the Mercedes design, you maintain the correct body geometry, reduce noise, and improve driving comfort. This is a practical solution for users who want to restore proper protection against water, wind, and debris without the costly replacement of the entire glass unit.

Specifications and technical data

• SKU: A6396712520
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6396712520
• Substitutable numbers: A6396712520, A 639 671 25 20
• Location on the vehicle: Rear
• Category: Car Glass

Purpose and function of the window gasket

The presented gasket is dedicated to the rear body zone, where it is responsible for stable guidance and pressing the window against the body frame. A properly selected rubber profile limits the penetration of water, moisture, and air gusts, which translates into a quieter vehicle interior and better protection of the upholstery. Precise fitment to the body lines facilitates installation and allows for maintaining the factory look of the side of the vehicle.

Benefits of using an original gasket

Choosing an original gasket dedicated to the Mercedes Vito and Viano W639 primarily ensures compatibility with the window frame and maintains proper pressure along the entire perimeter. In practice, this means:

• reducing the risk of water leaks at critical body points,
• reducing wind noise at higher speeds,
• stable window seating without stress,
• aesthetic finish of the glass edge.

Thanks to this, you maintain factory sealing parameters and acoustic comfort, which is particularly important in commercial and family vehicles such as the Vito and Viano.

Characteristics of the used component

The gasket comes from dismantling, which allows you to combine reasonable cost with maintaining the manufacturer's original specifications. The used component retains its factory shape and geometry, which is important when installing it into an existing window frame. In practice, this is a good solution for users who want to restore body tightness after damage or wear of the previous gasket, without investing in expensive replacements with uncertain profiles.

Installation and body fitment

The gasket has been designed for the specific construction of the rear part of the Mercedes Vito/Viano W639, so installation comes down to proper seating in the factory slots and guides. The lack of need for cutting or forced adjustments reduces the risk of leaks. Replication of the original contact line facilitates work for both professional service centers and independent workshops dealing with bodywork or repairs.

Comprehensive approach to body restoration

Replacing the window gasket is a good time to assess the condition of other body elements and systems affecting vehicle durability. During high temperatures, it is also worth paying attention to the efficiency of the cooling system – especially in commercial vehicles that often operate under load. If you are interested in how to optimally take care of engine cooling while reducing costs, check out our guide: Summer heat and the cooling system – how used radiators and fans help in economical operation.

Why it is worth choosing original body components

Using original components in Mercedes-class vehicles allows you to maintain structural consistency and predictable body behavior in the long term. Factory-spec gasket fitment for a specific model minimizes the risk of installation problems and reduces the need for subsequent corrections. This is a particularly beneficial solution for workshops that want to shorten repair time, as well as for users who value durability and the repeatable quality of body components.