Mercedes W166 Rear Quarter Side Window Glass Right O/S AS3 A1666702412

Mercedes W166 Rear Quarter Side Window Glass Right O/S AS3 is a precisely fitted body component from the Car windows category, designed for installation in the rear right section of the vehicle. This used component ensures factory-standard fitment with the bodywork, maintaining proper geometry and sealing. It is a practical solution for users looking for an original rear quarter side window for their Mercedes W166.

Specifications and technical data

• SKU: A1666702412
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1666702412
• Substitutable numbers: A1666702412, A 166 670 24 12
• Location on the vehicle: Rear, Right
• Category: Car Glass

Purpose and vehicle placement

The presented quarter glass is designed for installation in the rear right part of the body, within the side passenger area. This placement is significant for both structural rigidity and proper interior illumination and side visibility. Thanks to its dedicated shape and edge profile, the glass works seamlessly with seals and the body frame, which facilitates correct installation and reduces the risk of leaks.

Technical characteristics of the AS3 glass

The AS3 marking indicates a specific type of automotive glass adapted for use in demanding operating conditions. Such windows are designed with appropriate mechanical resistance and light transmittance in mind, in accordance with standards for side windows. In practice, this means stable material behavior during temperature changes, body vibrations, and typical operational loads.

In the case of the rear right quarter glass, maintaining the correct edge profile is particularly important, as it affects:

• proper adhesion to seals and frame elements,
• reduction of wind noise while driving,
• maintaining a consistent stylistic line of the side bodywork.

Benefits of using an original Mercedes window

Choosing an original rear quarter side window for a Mercedes W166 allows you to maintain the structural and visual consistency of the vehicle. A component from the same product line as the factory equipment ensures:

• compatibility with factory mounting and sealing points,
• maintenance of the correct body geometry in the rear right section,
• aesthetic matching with other windows and body elements.

For the user, this means reduced adaptation work during installation and a lower risk of fitment issues. The used component also allows for optimized repair costs while maintaining parameters close to factory standards.

Application in body repairs and upgrades

The rear right quarter side window is primarily used in post-accident repairs, replacing damaged glass elements, and renovating the side body section. Replacing this element is important not only from an aesthetic point of view but also for passive safety and driving comfort, as a correctly selected window affects the rigidity of the structure and the acoustic insulation of the interior.

If you are planning a comprehensive repair or upgrade of the side body zone in your Mercedes and need other elements from the same group, such as windshields, rear windows, or additional side windows, check the available parts in the Mercedes car windows category.

Selecting a used window and practical aspects

When choosing a used quarter side window for a Mercedes W166, it is worth paying attention to compatibility with the body version and the condition of the glass surface. A used component is a reasonable compromise between costs and maintaining the original vehicle specification, especially in the case of repairs performed on older models. This type of solution is often chosen by workshops specializing in the Mercedes brand and by conscious users who want to keep the vehicle in good technical condition without excessive budget strain.

If you are considering whether a new or used part is a better choice in your case and want to learn about the differences in costs, durability, and availability, the guide article Car parts – new or used? We compare costs, quality, and durability, which discusses the key aspects of component selection, may be helpful.