Mercedes W221 Rear Door Left N/S Window Glass AS2 A2217302918

The Mercedes W221 Rear Left Door Glass AS2 is an original part from the Automotive Glass category, designed for installation in the rear left door of an S-Class sedan. This used glass offers a practical and economical solution for body repairs, ensuring a proper fit with the door structure and maintaining the vehicle's original side profile.

Specifications and technical data

• SKU: A2217302918
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217302918
• Substitutable numbers: A2217302918, A 221 730 29 18, 43R-00257, 43R00257
• Location on the vehicle: Rear, Left
• Category: Car Glass

Intended Use and Fitment

The presented glass is dedicated to the rear left area of the W221 generation Mercedes S-Class. Thanks to its factory-profiled edges and appropriate bending radius, it ensures correct operation within the window regulator mechanism, a tight seal with the weatherstripping, and stable seating within the door frame.

The AS2 designation indicates the use of glass with suitable light transmission and radiation protection parameters, compliant with regulations for side windows in passenger vehicles. This allows for maintaining driving comfort and adherence to homologation standards.

Performance and Functional Parameters

The rear left glass for the Mercedes W221 is designed to work with the factory window regulator and door channels. The appropriate glass thickness and precise edge finishing minimize the risk of stress and cracks during operation, and also reduce noise generated by the glass moving within the channels.

In practice, this translates to:

• stable glass guidance throughout its entire range of motion,
• proper cooperation with the door seals,
• maintaining acoustic seal and reducing cabin noise,
• preserving the cohesive aesthetics of the vehicle's side profile.

Application in Body Repairs

Replacing the side glass in the rear left door is a common step in post-accident repairs, addressing parking damage, or vandalism. Using an original used glass can reduce costs while ensuring a proper fit with the door structure and original glazing specifications. This is a particularly beneficial solution for comprehensive repairs of the vehicle's side body, where both functionality and a consistent vehicle appearance are important.

Benefits of Choosing Used Mercedes W221 Door Glass

By opting for a used rear left door glass for the Mercedes W221, you gain an original part that has already been verified in real-world operating conditions. This allows you to combine a reasonable repair cost with the preservation of the original glass specifications, which is important for both travel comfort and the vehicle's subsequent resale value.

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

More on the Cost-Effectiveness of Used Parts

When selecting used body parts, such as glass, it is beneficial to understand the general principles of assessing part condition, compatibility issues, and the cost-effectiveness of repairs compared to purchasing new components. For a broader perspective on used parts, their cost advantages, and their impact on vehicle operation, refer to the article Used Car Parts for Mini Cooper – A Way to Style and Save, which discusses the practical aspects of choosing proven aftermarket parts.