Mercedes Vito Viano W639 Rear Left N/S Sliding Door Window Glass Tinted AS3

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes Vito Viano W639 Rear Left N/S Sliding Door Window Glass Tinted AS3 is a factory-original side window designed for the rear left sliding door in both commercial and passenger models. The AS3-rated tinted glass improves travel comfort, reduces interior heat buildup, and increases passenger privacy. It is a practical solution for users who expect both functionality and a consistent vehicle appearance.

Specifications and technical data

• SKU: A6397351009
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397351009
• Substitutable numbers: A6397351009, A 639 735 10 09
• Location on the vehicle: Rear, Left
• Category: Car Glass

Purpose and body fitment

The presented window is designed specifically for the sliding door on the rear left side of the body, ensuring a proper fit to the chassis and factory seals. The construction matches the original dimensions and body curves, ensuring that the seal and the sliding mechanism operate correctly after installation.

Positioning in the rear zone on the left side of the vehicle helps maintain a uniform window line after replacing a damaged component, which is important from both an aesthetic and passive safety perspective.

Characteristics of AS3 glass and tinting

Glass marked with the AS3 rating is a solution used in side and rear glazing where the priority is to limit light and radiation penetration. The tinted surface of the window:

• reduces glare and improves visual comfort for passengers,
• limits interior heating of the vehicle on sunny days,
• increases the level of privacy in the rear cabin or passenger area.

As a result, the window works well both in vehicles used for passenger transport and in commercial versions, where protecting transported cargo from outside view is important.

Application in service practice

Replacing a side sliding door window is a typical service operation following mechanical damage or collisions. Using a pre-owned component allows for maintaining the visual consistency of the vehicle while optimizing repair costs. The window from this product group enables:

• restoration of full sliding door functionality after glass breakage or shattering,
• maintenance of proper side body rigidity in the glazing zone,
• preservation of the vehicle's original character without the need for aftermarket replacements with different optics.

This solution is particularly beneficial for fleets, body shops, and individual users looking for a reasonable compromise between quality and repair cost.

Benefits of choosing a used tinted window

Choosing a used tinted window for the sliding door allows for cost reduction while maintaining functionality close to factory standards. This type of component:

• ensures compatibility with the styling line of the vehicle's other windows,
• enables quick installation without the need for body modifications,
• represents an economical alternative to new components.

For many users, it is also a way to keep the vehicle in good technical condition with a rational approach to operating costs.

Mercedes automotive glass – expansion and modernization

If you are planning a comprehensive repair or modernization of the side glazing area in your Mercedes and need other elements from the same group, such as side windows, rear windows, or additional sliding door glazing, check the available parts in the Mercedes automotive glass category.

Expert support in choosing used components

Selecting used body components, including windows, often involves questions about the cost-effectiveness and durability of such solutions. In the context of optimizing operating costs and making informed purchasing decisions, it is worth familiarizing yourself with practical tips regarding the secondary market – you will find them in the article Used car parts for Mini Cooper – a way for style and savings, which discusses the approach to choosing proven second-hand components.