Mercedes Vito Viano W639 Rear Right O/S Sliding Door Window Glass AS3

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes Vito Viano W639 Rear Right O/S Sliding Door Window Glass AS3 is an original side window from the Car windows category, designed for installation in the rear right sliding door. The component ensures proper visibility, body sealing, and compatibility with the factory body line of the Mercedes Vito and Viano W639.

Specifications and technical data

• SKU: A6397351109
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397350909
• Substitutable numbers: A6397350909, A 639 735 09 09
• Location on the vehicle: Rear, Right
• Category: Car Glass

Purpose and fitment

The presented window has been designed specifically for the rear right side of the vehicle, in the sliding door area. This ensures that the correct glazing geometry is maintained, and installation in the factory opening is predictable and repeatable. Proper fitment to the bodywork translates into stable seating in the door frame and correct interaction with seals and guides.

Technical characteristics of the AS3 window

The window marked with the AS3 class belongs to the group of tinted windows, which improves thermal comfort in the interior and limits the heating of the passenger compartment. This type of glass also provides better protection against excessive sunlight and increases passenger privacy in the rear part of the vehicle. The window construction is adapted for operation in sliding doors, where resistance to frequent movement and load changes during opening and closing is essential.

Benefits of using an original Mercedes window

Using a window dedicated to a specific Mercedes Vito/Viano W639 model allows for maintaining the stylistic consistency of the body and proper performance parameters. The original glass from this series ensures:

• proper fit to the shape of the sliding door on the rear right side of the vehicle,
• appropriate thickness and type of glass in accordance with the requirements for side windows,
• stable interaction with factory mounting elements.

Thanks to this, replacing a damaged window with this model allows you to restore the original functionality and aesthetics of the vehicle without the need for body modifications.

Using a used part in vehicle service

The item comes from the used car windows segment, which is a reasonable compromise between repair costs and maintaining the manufacturer's original specification. In practice, this means the possibility of an economical replacement of damaged glass while maintaining the factory standard of fit and appearance. A used window is a good choice in the case of post-accident repairs, mechanical damage, or cracks resulting from daily use.

If you want to better plan your repair budget and understand how using parts from the secondary market affects service costs, it is worth reading the article: Rising repair costs and the boom in used parts – how to save on car service?.

Expanding the glazing area in Mercedes Vito and Viano

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 additional side windows, door windows, or other rear window formats, check the available parts in the Mercedes car windows category.

Summary

Mercedes Vito Viano W639 Rear Right O/S Sliding Door Window Glass AS3 is a dedicated glazing element for the rear right side of the body, designed for the sliding door. The use of an AS3 class window improves travel comfort in the rear of the vehicle, and the original fitment for the Vito and Viano W639 models facilitates installation and allows for restoring the factory look and functionality of the side area.