Side Quarter Window Mercedes Vito W639 Front Left N/S Triangle Glass Glazing AS2

Visual condition of the part

The product shows signs of use visible in the photos.

Side Quarter Window Mercedes Vito W639 Front Left N/S Triangle Glass Glazing AS2 is a precisely fitted body component designed for installation in the front left section of the vehicle. Thanks to its triangular design and AS2 glass rating, the window provides excellent clarity, optical comfort, and body stability. It is a practical solution for users looking to restore the full functionality and aesthetics of the side body area in their Mercedes Vito W639.

Specifications and technical data

• SKU: A6396736505-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6396736505
• Substitutable numbers: A6396736505, A 639 673 65 05
• Location on the vehicle: Front, Left
• Category: Car Glass

Technical characteristics of the quarter window

The presented window belongs to the Car windows category and is dedicated to installation in the front left part of the body. The triangular geometry allows for precise filling of the space between the pillars, which contributes to the lateral rigidity of the structure and the correct alignment of the body lines. The use of AS2-rated glass ensures properly selected light transmission, which promotes driving comfort and reduces glare.

The element has been designed to maintain the factory body geometry, allowing for uniform gaps, proper adhesion to seals, and correct interaction with other side windows after proper installation. This is particularly important for commercial vehicles, where both functionality and body tightness are essential.

Purpose and fitment for Mercedes Vito W639

The window has been developed specifically for the Mercedes Vito W639 model, which translates into a proper fit for factory mounting points and the shape of the door frame or side panel. As a result, installation can be carried out in a predictable manner, without the need for body modifications or interference with the vehicle's structure.

The placement in the front zone, on the driver's side, is important for both visibility and the lateral rigidity of the vehicle. A properly selected triangular quarter window helps reduce air turbulence around the mirror, improves acoustic comfort inside the cabin, and supports the maintenance of proper sealing during intensive use of a commercial vehicle.

Benefits of using an original used window

Choosing a used component from the Car windows group for a Mercedes allows you to maintain the factory character of the vehicle while optimizing repair costs. An original triangular quarter window usually works better with existing seals and trim strips than random aftermarket replacements, which reduces the risk of leaks and unwanted noise while driving.

A used component of this type is a particularly attractive solution for post-accident repairs or spot damage, where it is crucial to restore the correct geometry of the side body section without overstretching the budget. Maintaining the original AS2 glass specification also helps ensure visual consistency for all windows in the vehicle.

Installation and maintenance recommendations

Due to the nature of the element, it is recommended that the window be installed by a specialized service or an experienced technician, using appropriate seals and adhesives intended for automotive glass. Proper seating in the frame, even pressure, and checking the gaps around the edges have a direct impact on tightness, the absence of rattles, and the correct operation of the door or side panel.

After installation, it is worth paying attention to the proper closing of the door, the absence of vibrations at higher speeds, and the even fit of the seals. Regular cleaning of the window with appropriate automotive glass cleaners will help maintain good visibility and limit the risk of micro-scratches, which is important during intensive use of a commercial vehicle.

If you are planning a comprehensive repair or upgrade of the side glazing area in your Mercedes and need other elements from the same group, such as side door windows, additional quarter windows, or fixed glazing elements, check the available parts in the Mercedes car windows category.

To better understand why used original components for premium brands, such as Mercedes, are becoming an increasingly popular choice for repairs and upgrades, it is worth reading the article: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026.

If you are considering a wider post-accident body repair and want to make an informed decision between used parts and aftermarket replacements, the following guide may also be helpful: Post-accident repair of your car: why used body parts are a better choice than replacements?.