Mercedes W177 Sunroof Glass Panel Sliding Panoramic Roof Glass AS3 A1777801100

The Mercedes W177 Panoramic Sliding Sunroof AS3 is an original body part designed for the compact Mercedes A-Class W177 generation models. Its panoramic, sliding design illuminates the cabin, enhances travel comfort, and boosts the car's visual appeal while maintaining factory-fit standards. This solution is for users who expect consistency with factory specifications and a secure, no-modification installation.

Specifications and technical data

• SKU: A1777801100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1777806800
• Substitutable numbers: A1777801100, A 177 780 11 00, A1777806800, A 177 780 68 00
• Category: Moulding Strips

Technical Characteristics and Purpose

The presented sunroof belongs to the premium body parts category, specifically designed for the W177 construction. The AS3 type panoramic glass panel ensures an appropriate level of light transmission while maintaining thermal and acoustic comfort inside. The sliding function allows for effective cabin ventilation and, at the same time, preserves the roof's structural rigidity as per the manufacturer's design.

As an original Mercedes part, the sunroof is optimized for roof geometry, guide rails, and seals, which translates to proper mechanism operation and effective water drainage. This ensures compatibility with factory control systems and other roof assembly components.

Benefits of Using an Original Panoramic Sunroof

Using a factory-original, sliding panoramic sunroof in a Mercedes W177 helps maintain the vehicle's structural integrity and avoids problems typical of non-factory solutions. Key advantages include:

• Factory Fit – maintaining original mounting points and proper alignment with the roof panel.
• Vehicle System Compatibility – designed to work with factory control and safety systems.
• Consistent Body Aesthetics – appearance aligned with the W177 model's styling, without visual compromises.
• Optimal Functionality – smooth operation of the sliding mechanism and proper sealing under various operating conditions.

For users who wish to preserve the original character of the bodywork, choosing such a solution is particularly beneficial for post-accident repairs or when replacing worn-out roof components.

Condition, Verification, and Service Application

The part is offered as a used part, allowing for economical repairs while maintaining the original manufacturer's specifications. This type of component is particularly useful in situations where a complete sunroof module replacement is necessary after mechanical damage, hail, or sliding mechanism failure.

Due to the nature of the roof construction, installation is recommended to be entrusted to a specialized service center that will ensure proper guide rail alignment, adjustment of the glass position relative to the panel, and leak testing. Correct installation directly impacts the durability of seals, acoustic comfort, and proper water drainage from the sunroof cassette.

Application in Service Practice and Equipment Upgrades

The Mercedes W177 Panoramic Sliding Sunroof AS3 is suitable for both standard replacement of a damaged module and for upgrading the car's equipment with a panoramic roof as part of modifications consistent with the vehicle's factory architecture. In both cases, maintaining the original geometry and operating parameters is crucial, which facilitates subsequent service maintenance.

If you are planning a comprehensive repair or modernization of the roof area in your Mercedes and need other parts from the same group, such as trim strips, masking sealing tapes, or decorative glass trims, check the available parts in the Mercedes Decorative Strips and Tapes category.

Why Choose a Used OEM Part

For body parts like a panoramic sunroof, choosing an original used part often means better fit and less interference with the vehicle's structure compared to aftermarket alternatives. Factory tolerances are maintained, and the component complies with the manufacturer's technical documentation.

If you want to better understand when a used original part is a better solution than an aftermarket one, it's worth reading the practical tips in the article 5 Reasons Why a Used OEM Part is a Better Choice Than an Aftermarket Replacement.