Mercedes W211 Panoramic Sunroof Sliding Roof Middle Window Glass Tinted AS3

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W211 Panoramic Sunroof Sliding Roof Middle Window Glass Tinted AS3 is an original component designed for the front section of the roof module. It allows for maintaining the factory functionality of the panoramic roof while providing a comfortable amount of light in the cabin and protection against excessive heating thanks to the tinted glass pane. This is a solution for users who want to restore the full efficiency of the sliding roof while maintaining OEM parameters.

Specifications and technical data

• SKU: A2117800121
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2117800121
• Substitutable numbers: A2117800121, A 211 780 01 21
• Location on the vehicle: Front
• Category: Other Exterior Parts & Accessories

Purpose and function in the vehicle

The described glass is a component of the front section of the panoramic sliding roof in the Mercedes E-Class W211 generation. Its placement in the front part of the roof means it is responsible for both illuminating the cabin and ensuring proper cooperation with the sliding mechanism. The design of the pane is adapted for factory rail guidance and for compatibility with seals and the roof cassette.

Technical characteristics of the panoramic glass

The middle panoramic roof glass in this model is made of safety glass with an AS3 tint rating, which limits the penetration of sunlight and improves thermal comfort inside. The tint reduces glare while maintaining good visibility and a sense of cabin spaciousness. The pane is profiled to the specific geometry of the W211 roof, which allows for proper adhesion to the seals and minimizes the risk of leaks after correct installation.

Benefits of using the original panoramic glass

Using the original panoramic glass in a Mercedes W211 allows for maintaining the factory operating parameters of the sliding roof, including smooth movement and correct positioning in the guides. As a result:

• the tightness of the roof system is maintained during rainfall and vehicle washing,
• the body aesthetics are preserved in accordance with the manufacturer's design,
• the sliding mechanism operates within the structurally intended range, without additional stress.

The tinted AS3 glass also supports acoustic and thermal comfort, limiting interior heating and noise from the outside at higher speeds.

Component condition and installation aspects

The item comes from disassembly and is offered as a used panoramic glass. Before installation, it is recommended to perform a standard inspection of the glass edges, mounting points, and cooperating seals and guides to ensure proper fitment with the roof cassette. Installation should be performed in accordance with service procedures for the panoramic sliding roof in the Mercedes W211, which will allow for trouble-free operation and proper cooperation with the existing mechanism.

Part selection and additional information

When selecting panoramic glass for a specific W211 unit, it is worth paying attention to compatibility with the body version and roof configuration. The product has an assigned OEM number and interchangeable numbers, which facilitates verification of compatibility with a specific vehicle based on catalog data. This allows for precise matching of the component to the existing roof cassette and avoids installation problems.

If you are planning a comprehensive repair or upgrade of the roof area in your Mercedes and need other components from the same group, such as guides, seals, or roof cassettes, check the available parts in the Other Mercedes category.

For users interested in comparing the characteristics of sports versions of vehicles with standard variants, including differences in engine, braking system, and chassis construction, the article on our blog may be helpful: Audi RS vs other models – what is hidden under the hood and chassis?.

If you are considering the choice between aftermarket components and new parts, it is worth reading the cost and durability analysis in the material: Car parts – new or used? We compare costs, quality, and durability, which will facilitate making an informed decision when planning work on the panoramic roof.