Mercedes W204 Panoramic Sunroof Sliding Roof Rear Window Glass Panel AS3

Mercedes W204 Panoramic Sunroof Sliding Roof Rear Window Glass Panel AS3 is an original body component designed for the rear section of the roof in Mercedes W204 class models. This used roof glass module allows for restoring the proper operation of the sunroof, maintaining airtightness, and preserving the vehicle's aesthetic appearance. It is a solution for users who expect factory fitment, solid construction, and compliance with the manufacturer's factory standards.

Specifications and technical data

• SKU: A2077800321
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2077800321
• Substitutable numbers: A2077800321, A 207 780 03 21
• Location on the vehicle: Rear
• Category: Other Exterior Parts & Accessories

Purpose and function in the vehicle

The described roof glass is a component designed for installation in the rear part of the sunroof, responsible for proper interior illumination and cooperation with the opening and closing mechanism. By maintaining the original geometry and construction, this element ensures:

• proper fitment with the sunroof frame and seals,
• stable guidance within the mechanism tracks,
• maintenance of roof tightness during rainfall and vehicle washing,
• preservation of the factory body line characteristic of the Mercedes W204.

Benefits of using an original roof glass

Using an original roof glass in a Mercedes W204 allows you to avoid problems typical of aftermarket replacements, such as inaccurate fitment or difficulties with adjustment. By choosing this element, you gain:

• compatibility with the factory sunroof mechanism – without the need for structural modifications,
• visual consistency with other body components,
• the ability to restore full functionality of the rear sunroof section after damage or wear of the previous glass,
• a cost-effective solution compared to replacing the entire roof module.

Characteristics of the used component

The offered roof glass is a used part, sourced from dismantling, which allows for maintaining compliance with the original manufacturer's specifications. This type of component is particularly attractive to users who want to combine factory build quality with a reasonable repair budget. The used element retains the construction and parameters intended for the given model, which facilitates installation and subsequent operation.

Professional installation and operation

To fully utilize the potential of this roof glass, installation in a specialized service center is recommended, which will ensure:

• proper alignment of the glass in the tracks,
• adjustment of height and adhesion to the seals,
• leakage testing after installation,
• verification of the correct operation of the opening and tilting mechanism.

Such an approach minimizes the risk of leaks and noise at higher speeds, and also extends the service life of the entire sunroof system.

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

Technical support and expert knowledge

When selecting body components, such as a sunroof or roof glass, it is worth using reliable sources of knowledge and the experience of specialists dealing with premium brands. For those interested in deepening their knowledge about structural differences between standard and sports versions, including the impact of body and chassis elements on the car's character, the article on our blog may be helpful: Audi RS vs other models – what is hidden under the hood and chassis?. It allows for a better understanding of how manufacturers design key components and how this translates into the subsequent selection of spare parts.

Summary

Mercedes W204 Panoramic Sunroof Sliding Roof Rear Window Glass Panel AS3 is a practical solution for owners who want to restore the efficiency of the rear sunroof section while maintaining the original character of the vehicle. The used, original element ensures proper fitment, cooperation with the factory mechanism, and aesthetics consistent with the Mercedes body line, making it a reasonable choice for repairs and roof renovations in this model.