Mercedes W251 Window Glass Rear Left Door N/S Tinted Glazing AS3 A2517302355

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W251 Window Glass Rear Left Door N/S Tinted Glazing AS3 is a factory-original component from the Car windows category, designed for installation in the rear left door of this vehicle series. The AS3 standard tinted glass provides comfortable protection against excessive sunlight and improves passenger privacy while maintaining proper safety parameters.

Specifications and technical data

• SKU: A2517302355
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2517302355
• Substitutable numbers: A2517302355, A 251 730 23 55
• Location on the vehicle: Rear, Left
• Category: Car Glass

Purpose and function of the rear left window

The offered window has been designed specifically for installation in the rear left door of Mercedes W251 series vehicles. Its placement on the rear left side of the vehicle ensures a proper fit with the door frame, seals, and window regulator mechanism, which translates into stable operation and system tightness.

The AS3 tinted glass limits the penetration of sunlight into the cabin, which improves thermal comfort and reduces the heating of upholstery. At the same time, the glass maintains appropriate transparency and optical parameters, which are essential for driving safety and visibility in the side mirrors.

Technical characteristics of AS3 glass

Glass marked with the AS3 class is a solution used in areas where darker tinting is permitted compared to front windows. As a result, the rear left door window in this model provides:

• reduced glare from sunlight and the headlights of other vehicles,
• better protection of the interior against material fading,
• more comfortable travel conditions for rear seat passengers.

As an element from the Car windows category, the product works with factory guides, seals, and the window regulator, which facilitates installation and reduces the need for additional modifications.

Product condition and service application

The window is offered as a used part, which allows for economical vehicle repair while maintaining the manufacturer's original specifications. This type of component is particularly useful in situations such as:

• mechanical damage to the glass (cracks, breakage, deep scratches),
• the need for replacement after a side collision,
• restoring the vehicle to factory condition after improper window modifications.

Using an original rear left window allows for maintaining the visual consistency of the vehicle, proper fit to the bodywork, and compliance with factory safety standards.

Selection and vehicle compatibility

To correctly select the window for a specific Mercedes W251 unit, it is worth paying attention to the manufacturer's markings and mounting parameters, such as body type and door configuration. The product should be treated as a dedicated element for the rear left side, which eliminates the risk of problems with glass geometry, door closing, or the operation of the lifting mechanism.

A properly selected rear left window ensures:

• proper adhesion to seals and the body,
• stable operation in the guides during opening and closing,
• maintenance of factory noise levels and interior tightness.

Expanding the window system in a Mercedes

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

OEM safety and the benefits of used parts

Choosing original windows from dismantling is a solution that combines controlled repair costs with maintaining the vehicle manufacturer's standards. You can find more about the advantages of using used factory components, their impact on safety, and the durability of repairs in the article: Quality assurance and OEM safety – why are used original car parts the best choice for your car?.