Mercedes W251 Sunroof Sliding Roof Mechanism Assembly Window Glass A2517801029

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W251 Sunroof Sliding Roof Mechanism Assembly Window Glass is an original structural component designed for the sliding roof system in W251 series models. This used mechanism ensures a factory-fit, maintaining the correct guide geometry and proper interaction with other sunroof components. It is an ideal solution for users looking to restore the functionality of their sliding roof while maintaining OEM specifications and body compatibility.

Specifications and technical data

• SKU: A2517801029
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2517801029
• Substitutable numbers: A2517801029, A 251 780 10 29
• Category: Other Exterior Parts & Accessories

Purpose and function of the sunroof mechanism

The presented mechanism is responsible for the precise sliding and guiding of the roof panel in the Mercedes W251. Its task is to stably hold the glass pane or metal panel within the guides, ensure smooth opening and closing, and provide proper sealing of the structure in the closed position. Using an original solution allows for the correct operation of the entire sliding roof module without the need for body adaptations or modifications.

Construction and fitment for the W251 body

The mechanism has been designed specifically for the roof architecture of the Mercedes W251, taking into account the roof shape, the layout of mounting points, and the operating characteristics of the sunroof drive system. Properly selected guides, sliding elements, and mounting points ensure:

• stable panel guidance throughout the entire range of motion,
• correct fitment with the roof frame,
• maintenance of gaps and operating clearances in accordance with the factory design.

As a result, installation in the W251 body is straightforward, and the mechanism works seamlessly with the existing sunroof frame and seals.

Benefits of using an original mechanism

Using an original sliding roof mechanism in a Mercedes provides tangible operational benefits. The user gains:

• factory fitment to the roof structure, with no modifications required,
• preservation of the original sunroof operating characteristics,
• consistency with other body and interior components.

This solution is particularly beneficial for repairs following mechanical damage, guide seizures, or issues with smooth panel movement.

Condition and service application

The item comes from disassembly and is offered as a used original component, which allows for an economical repair while maintaining the manufacturer's specifications. The mechanism is suitable for both professional workshops specializing in body and sliding roof repairs, as well as for knowledgeable users independently sourcing parts for their Mercedes W251.

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, mounts, or additional modules, check out the available parts in the Other Mercedes category.

Technical support and component knowledge

When planning repairs for body systems, roofs, or structural elements, it is worth using reliable sources of information regarding car construction and the differences between specific model versions. A good point of reference can be the analysis of solutions used in high-performance cars – you can find more on this topic in the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how manufacturers differentiate construction and components within a single brand.