Mercedes Vito W639 Panoramic Sunroof Sliding Roof Front Window Glass Tinted AS3

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes Vito W639 Panoramic Sunroof Sliding Roof Front Window Glass Tinted AS3 is an original, tinted glass component designed for the factory panoramic sliding roof system. Thanks to its precise fit for the specific Vito W639 generation and the use of AS3-grade glass, this component provides comfortable sun protection while maintaining high clarity and aesthetics. It is a practical solution for users who want to restore the full functionality of the sunroof or perform a solid repair after the original glass has been damaged.

Specifications and technical data

• SKU: A6397800305
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397800305
• Substitutable numbers: A6397800305, A 639 780 03 05
• Location on the vehicle: Front
• Category: Other Exterior Parts & Accessories

Purpose and fitment for Mercedes Vito W639

The offered glass is dedicated to the panoramic sliding roof in the Mercedes Vito W639 model, mounted in the front section. The design has been engineered for the factory rails and sunroof mechanism, which allows for maintaining the correct geometry, sealing, and smooth operation of the entire system. The component is ready for installation in place of the original glass, without the need for modifications to the bodywork or roof frame.

Characteristics of AS3 tinted glass

The AS3-grade tinted glass limits the penetration of sunlight into the cabin, improving thermal comfort and reducing interior heating during parking and driving. At the same time, adequate visibility to the outside is maintained, which promotes pleasant cabin illumination and highlights the utility character of the Vito in passenger and multi-purpose versions. Window tinting also helps reduce glare and improves the subjective sense of passenger privacy.

Function in the sunroof system

The front roof glass in a panoramic sunroof plays a key role in:

• ensuring the tightness of the sliding roof system,
• stable guidance along the rails and mechanism components,
• protecting the interior from weather conditions,
• maintaining the proper rigidity of the sunroof frame structure.

Thanks to the correct fit of dimensions and shape, replacing damaged glass with the presented component allows for restoring the proper operation of the entire system without interfering with the roof mechanics.

Condition, origin, and benefits of using a used part

The component comes from a Mercedes vehicle and is a used part, which allows for combining reasonable repair costs with maintaining the manufacturer's original specifications. Choosing an original roof glass from dismantling is a good solution for users who expect compatibility with the factory system while wanting to avoid problems with fitting aftermarket replacements. The used panoramic glass is particularly attractive for accident repairs and the renovation of fleet vehicles, where consistency and predictability of installation are important.

Practical installation and maintenance tips

When replacing the roof glass, it is recommended to:

• check the condition of the sunroof seals and rails,
• inspect the sliding mechanism for play and resistance,
• thoroughly clean the roof frame before installing the new component,
• perform a leak test after completing the work.

Professional installation allows you to fully utilize the advantages of the tinted panoramic glass and reduce the risk of subsequent leaks or noise at higher speeds.

If you are planning a comprehensive repair or upgrade of the upper body area in your Mercedes and need other elements from the same group, such as additional roof glass, mounting elements, or seals, check the available parts in the Other Mercedes category.

To compare the character of sports constructions with advanced drive and braking systems, you can familiarize yourself with the analysis of RS models in the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how different market segments use technical solutions in the body and chassis.

If you are preparing a vehicle for intensive use in changing weather conditions and want to better plan the inspection of body and glazing elements, the guide Winter essentials: which used car parts are worth checking and replacing before the frost? may be helpful, where you will find practical tips on checking used components.