Mercedes GL X166 Rear Quarter Side Window Glass Tinted Right O/S AS3 A1666706100

Mercedes GL X166 Rear Quarter Side Window Glass Tinted Right O/S is an original body component from the Car windows category, designed for installation on the passenger side in the rear part of the vehicle. Thanks to its factory tint, it improves driving comfort, reduces interior heating, and increases privacy, while maintaining high transparency and compliance with AS3 safety glass requirements.

Specifications and technical data

• SKU: A1666706100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1666706100
• Substitutable numbers: A1666706100, A 166 670 61 00
• Location on the vehicle: Rear, Right
• Category: Car Glass

Purpose and body fitment

The component has been specifically designed as a rear quarter side window for the right side of the body in the Mercedes GL X166 generation. Precise fitment to the body lines facilitates installation and allows for maintaining the factory glazing geometry, which is important for both aesthetics and body sealing.

Proper edge profiling and the correct glass thickness ensure stable seating in the frame and correct interaction with seals and interior side trim elements.

Characteristics of AS3 tinted glass

The window is made of safe AS3-type glass with an increased level of tint, which effectively reduces the penetration of sunlight into the cabin. This type of glass:

• reduces heating of the rear interior,
• improves passenger travel comfort, especially on longer journeys,
• increases the level of privacy thanks to limited visibility into the vehicle.

Additionally, tinted glass can help protect upholstery elements and plastics from excessive fading caused by UV radiation.

Condition, origin, and benefits of choosing a used window

The offered rear quarter side window is a used component, which allows you to combine an attractive purchase cost with maintaining the original Mercedes manufacturer specifications. In practice, this means factory fitment, correct optical parameters, and consistency with the body's stylistic line.

Choosing an original window from the secondary market is particularly beneficial for post-accident repairs or replacing damaged glazing – it allows for cost reduction while maintaining a consistent vehicle appearance and proper functional properties.

If you want to learn more about the advantages of such solutions, it is worth reading an article discussing the most common concerns and facts regarding second-hand parts: Used car parts: myths and facts you need to know.

Safety and comfort of use

The original rear quarter side window in the Mercedes GL X166 is an essential element of the body structure – it affects side rigidity, passenger protection, and the proper functioning of sealing systems. The use of glass with the appropriate class and optical quality reduces image distortion, which is important for the visual comfort of passengers sitting in the back.

With proper installation, water and noise tightness are maintained, which translates into lower noise levels in the cabin and stable thermal conditions. This is especially important in large SUVs, where the glazing area is extensive and differences in component quality are easily noticeable.

Support with selection and other Mercedes windows

In the case of replacing a rear quarter side window, it is worth paying attention to compatibility with the specific body version and other vehicle glazing to maintain a uniform degree of tint and a consistent look for the entire window line. In case of doubts regarding fitment, comparing the shape and mounts with the currently installed element is helpful.

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