Mercedes Vito W639 Sealing Gasket Rear Left Right N/O/S Vent Window A6396712620

Mercedes Vito Viano W639 Rear Left Window Seal is an original part from the Window Seals and Trim category, designed for professional body conversions. Thanks to its precise fit to the left rear door structure, it ensures sealing, reduces noise, and improves driving comfort. This is a practical solution for users who want to restore factory-standard protection against water and wind.

Specifications and technical data

• SKU: A6396712620
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6396712620
• Substitutable numbers: A6396712620, A 639 671 26 20, BG
• Location on the vehicle: Rear, Right, Left
• Category: Window Seals, Gaskets & Trims

Vehicle Application and Placement

The presented window seal is designed for use in the rear of the vehicle, with the possibility of installation on both the left and right sides of the body. In practice, this means the part can be used in various rear body configurations, making it easier to select the correct component during repair or reconstruction of the factory seal.

Thanks to its dedicated profile, the seal works with the window frame and door structure, creating a stable support for the glass and limiting the penetration of water, dust, and drafts into the passenger cabin or cargo area.

Benefits of Using an Original Window Seal

Using an original seal in a Mercedes Vito or Viano allows you to maintain the parameters intended by the vehicle manufacturer. This contributes to:

• maintaining proper sealing of the window to the bodywork,
• reducing wind noise at higher speeds,
• limiting the risk of moisture entering the interior,
• stable seating of the window in the rear door frame.

For commercial vehicles like the Vito and Viano, a correctly chosen window seal is important not only for comfort but also for protecting the transported cargo and the durability of interior trim and lining elements. Proper sealing of the rear bodywork helps reduce corrosion and extends the lifespan of the structure.

Part Characteristics and Fitment

This seal belongs to the group of body parts responsible for separating the vehicle's interior from external conditions. Its profile is adapted to the geometry of the window and door frame in Vito and Viano W639 models, allowing for installation without modifications. Factory-matched shape translates to even pressure around the entire perimeter of the window and stable operation during use.

The part is from a dismantled vehicle, which means it is a component with parameters consistent with the original vehicle manufacturer's specifications. For many users, this represents a favorable compromise between quality and repair cost, especially for heavily used delivery vans.

Application in Service and Body Repairs

The rear window seal is often replaced during:

• disassembly and reassembly of the window after bodywork and paint repairs,
• addressing leaks causing water ingress or excessive noise,
• restoration of rear doors after collisions or intensive use.

Choosing an original part allows the service center or workshop to maintain repair consistency and avoid fitment issues that often arise with universal aftermarket alternatives. Precise body fitment reduces installation time and minimizes the risk of needing to readjust the window.

Related Products and Technical Knowledge

If you are planning a comprehensive restoration of window seals in your Mercedes and are also interested in other parts from the same group, such as window trim or additional sealing profiles, check out the available parts in the Mercedes Window Seals and Trim category.

When selecting used body parts, including window seals, it's worth knowing the common pitfalls associated with buying second-hand parts. You can find more practical tips in the article Buying Used Car Parts – Common Mistakes When Choosing Tuning Parts, which helps you plan repairs and vehicle upgrades consciously.