Mercedes GL X164 Rear Window Trunk Tailgate Glass Glazing AS2 A1647400357

Mercedes GL X164 Rear Window Trunk Tailgate Glass Glazing is an original component from the Car windows category, designed for installation in the rear part of the vehicle body. Using a pre-owned tailgate rear window allows for maintaining the factory body geometry, proper structural rigidity, and correct rear visibility, which is essential for both safety and comfort in daily operation.

Specifications and technical data

• SKU: A1647400357
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1647400357
• Substitutable numbers: A1647400357, A 164 740 03 57
• Location on the vehicle: Rear
• Category: Car Glass

Purpose and function of the tailgate rear window

The rear window in the tailgate of a Mercedes GL X164 operates in a demanding area of the body – it is a component that closes the cargo space and works in conjunction with the tailgate seal and its lifting mechanism. A properly selected window ensures:

• adequate rear visibility for the driver,
• proper sealing of the cargo area against water and contaminants,
• maintenance of the structural rigidity of the rear body section,
• a consistent appearance with the vehicle's other glazing.

The original window with the AS2 marking meets standards regarding light transmission and safety, which is important for technical inspections and the daily use of a large SUV.

Mounting parameters and body fitment

The presented window is intended for installation in the tailgate area, i.e., the rear part of the vehicle. The design is prepared to work with the factory tailgate frame, original seals, and stock mounting elements, which facilitates service work and reduces replacement time.

Selecting a window that matches the Mercedes GL X164 body construction reduces the risk of leaks, glass stress, and tailgate closing issues. For workshops and users, this means stable installation, predictable performance during operation, and no need for body modifications.

Operational characteristics and condition of the component

The window comes from the used original parts segment, which allows for combining the preservation of factory specifications with a more favorable repair cost compared to new components. This type of solution is particularly attractive in the case of large glazing, where the price of new parts can be significantly higher.

Choosing a used tailgate rear window for a Mercedes GL X164 is a reasonable option for post-accident repairs, replacement after cracking or mechanical damage, as well as for body restoration in older vehicles. Maintaining the original geometry and manufacturing technology promotes trouble-free operation after installation.

Application in service practice

The component will prove useful both in professional body and paint shops and in specialized workshops dealing with premium car repairs. The tailgate rear window for the Mercedes GL X164 enables:

• restoring the full functionality of the tailgate after a collision or damage,
• maintaining consistent body aesthetics after replacing body panels,
• reducing repair costs while maintaining the OEM standard.

Thanks to the use of original glazing, one can avoid fitment problems typical of lower-precision aftermarket replacements.

Expansion of service scope and related components

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

When planning broader renovation or modernization work on premium cars, it is worth considering the wider use of original components from the secondary market. This trend is discussed in detail in the article Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026, which helps in consciously choosing a repair strategy and optimizing costs.

To compare manufacturers' approaches to body construction and glazing in other car segments, it is also worth reading the analysis of the evolution of a popular sports hatchback in the article Hot-hatch legend: the evolution of the VW Golf GTI from Mk1 to Mk8 – structural changes and VW car parts, which allows for a better understanding of the differences between designing large SUVs and compact sports cars.