Mercedes W251 Rear Window Tailgate Boot Lid Glass Glazing AS3 Tinted

Mercedes W251 Rear Window Tailgate Boot Lid Glass Glazing AS3 Tinted is an original component from the Car windows group, designed for installation in the rear part of the vehicle body. The AS3 tinted glass improves driving comfort by reducing interior heating and increasing the privacy of passengers and the luggage compartment. This solution allows for maintaining a consistent, factory look of the vehicle while upholding high safety standards.

Specifications and technical data

• SKU: A2517400257
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2517400257
• Substitutable numbers: A2517400257, A 251 740 02 57
• Location on the vehicle: Rear
• Category: Car Glass

Purpose and function of the tailgate rear window

The tailgate rear window in the Mercedes W251 is responsible not only for rear visibility but also for the structural rigidity of the tailgate and the sealing of the entire luggage area. This component works in conjunction with seals, hinges, and the lock, which is why its proper fit is crucial for protection against water, noise, and air turbulence while driving.

The AS3 tinted glass used in this model limits the penetration of sunlight, which helps maintain a more stable temperature inside the vehicle and reduces fading of the trunk upholstery. At the same time, adequate light transmission is maintained, ensuring a clear view in the rearview mirror.

Performance parameters and benefits of installation

The placement of the glass in the rear part of the vehicle makes it particularly vulnerable to mechanical damage, scratches, or cracks. Replacing it with an original component from the same series allows for maintaining the correct geometry of the tailgate and compatibility with factory mounting elements. As a result, the fitting process is predictable, and the risk of leaks after installation is minimized.

Key advantages of this solution include:

• maintaining the factory body line and the aesthetics of the vehicle's rear,
• tinted glass improving thermal and visual comfort,
• compatibility with original tailgate mounting elements,
• maintaining the correct field of view in the rearview mirror.

Characteristics of AS3 tinted glass

Glass marked with the AS3 class is designed for use in areas where lower light transmission is permitted compared to front windows. In practice, this means more comfortable conditions for passengers in the rear of the vehicle and better protection of transported luggage from the view of outsiders. At the same time, the required safety standards regarding impact and shatter resistance are maintained.

In the case of the tailgate rear window in the Mercedes W251, the use of AS3 glass allows for combining protective functions with the aesthetics characteristic of this model series. This solution will be particularly appreciated by users who care about a consistent look for the entire vehicle glazing.

Component condition and installation aspects

The offered tailgate rear window is a secondary market component, which allows for optimizing repair costs while maintaining the manufacturer's original specifications. Before installation, it is recommended to verify compatibility with the specific vehicle equipment version and check the condition of seals and mounting elements to ensure tightness and stable seating of the glass.

Professional installation at a specialized glass service or a body shop minimizes the risk of stress in the glass and leaks around the tailgate. A correctly installed window restores the full functionality of the rear body section, including the proper operation of the wiper and license plate lighting, if integrated with the tailgate.

Choosing a used window and cost-effectiveness

Choosing a used component from the Car windows group is often a reasonable compromise between cost and maintaining original quality. In the case of a tailgate rear window, it is important to be guided by compliance with the manufacturer's markings and glass parameters, which facilitates matching to a specific body version.

If you want to better understand the differences between original, replacement, and used parts and consciously plan your repair budget, it is worth reading the article Original, replacement, or used – which car parts are the most cost-effective?, which discusses issues of costs, quality, and matching by identification numbers.

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