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

Mercedes W639 Front Side Quarter Window Left N/S Triangle Glass Glazing AS2 is a precisely fitted body component designed for installation in the front left section of the vehicle. This quarter glass improves the rigidity of the side structure, enhances driver visibility, and contributes to the overall aesthetics of the bodywork, while remaining a cost-effective solution. As part of the Car windows group, it serves as a functional component of the glazing system in your Mercedes.

Specifications and technical data

• SKU: A6396736505
• 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

Purpose and function of the quarter glass

The described body glass is designed specifically for installation in the front left section of the Mercedes Vito W639 body. Its triangular shape allows for precise filling of the space between the pillar and the door, which:

• stabilizes the side line of the body,
• reduces air turbulence in the mirror area,
• supports proper water drainage from this zone,
• increases acoustic comfort inside the cabin.

Thanks to its appropriate profile, the glass works in harmony with the seals and the door frame, which facilitates correct installation and maintains the tightness of the glazing system.

Performance parameters and AS2 standard

The glass marked with the AS2 class meets the requirements for light transmission and safety for side and body windows. This means that it:

• ensures adequate visibility in typical road conditions,
• is adapted for use in the side zone of the vehicle,
• has been designed with resistance to typical operational loads in mind.

Such a solution is particularly important in commercial vehicles, where the vehicle often operates in varied weather and road conditions.

Mercedes fitment and identification by part numbers

As a component intended for Mercedes, the glass is structurally adapted to the geometry of the Vito W639 body, which translates into proper fitment with the door frame and pillar. The product has a dedicated OEM part number and interchangeable numbers, which facilitates verification of compatibility with a specific vehicle version in manufacturer catalogs or during consultation with a service center.

If you want to deepen your knowledge about selecting components and avoiding unnecessary costs during vehicle operation, it is worth checking out the guide TOP 10 most frequently replaced parts in your car, where you will find practical tips on planning repairs.

Installation zone – front left and service aspects

The glass is intended for installation in the front – left side zone, which is important both when selecting parts and when planning bodywork or glass replacement after a collision. Proper seating in the frame requires maintaining the cleanliness of the contact surfaces and using appropriate mounting materials recommended for body glass.

In service practice, replacing the quarter glass is often performed in parallel with other work within the door or pillar area, so it is worth verifying the completeness of the necessary fastening and sealing elements in advance.

Expanding the glazing system in your Mercedes

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

Safe selection of parts by OEM numbers

When purchasing glass and other body components online, correct matching by OEM numbers and vehicle data is crucial. Proper identification minimizes the risk of purchasing an incompatible part and speeds up the repair process. If you want to learn proven methods for verifying component compatibility, the guide buying parts online using OEM numbers for Mercedes and BMW cars will be helpful, as it describes practical ways to check components before finalizing your order.