Mercedes S212 Estate Rear Door Fixed Window Glass ESG Right O/S A2127304400

Mercedes S212 Estate Rear Door Fixed Window Glass ESG Right O/S is an original body component designed for installation in the rear right section of the E-Class estate. The fixed side window ensures stable body geometry, improves visibility, and contributes to the vehicle's consistent, factory-original appearance. This is the solution for users who expect precise fitment, secure installation, and compliance with factory specifications.

Specifications and technical data

• SKU: A2127304400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2127304400
• Substitutable numbers: A2127304400, A 212 730 44 00
• Location on the vehicle: Rear, Right
• Category: Car Glass

Purpose and function of the rear door fixed window

The described window is a component of the estate body side structure, mounted in the rear right door. As a fixed window, it does not open, which translates into stability within the door frame and reduced stress during operation. This type of solution:

• ensures constant, predictable structural rigidity of the door,
• contributes to acoustic comfort inside the vehicle,
• maintains the factory glazing line characteristic of the S212 Estate body.

Thanks to the use of ESG (toughened safety glass) technology, the window is resistant to typical operational loads, and in the event of damage, it breaks into small fragments, which reduces the risk of serious injury.

Construction and ESG technology

ESG glass undergoes a thermal tempering process, resulting in increased mechanical strength and resistance to thermal shock compared to standard glass. In practice, this means:

• better resistance to point loads and minor impacts,
• dimensional stability in varying temperature conditions,
• safe breakage pattern – into small, blunt fragments.

The fixed rear window in this model is profiled to the specific body geometry, which allows for proper alignment with seals and the door frame and minimizes the risk of leaks after correct installation.

Compatibility and body fitment

The component was designed specifically for the S212 generation E-Class estate version, intended for the rear right side of the vehicle. This means that the shape, bending radii, and glass thickness are adapted to the factory door construction and the side body line. Proper fitment translates into:

• easier installation in place of the original window,
• preservation of factory gaps and styling lines,
• no need for bodywork modifications during standard replacement.

For certainty of selection, it is worth comparing the window parameters with the removed element and verifying compatibility with the service documentation of the specific vehicle.

Characteristics of the used component

As an aftermarket part, the window comes from dismantling, which allows for maintaining factory origin and original specifications while reducing repair costs. This type of component is a good choice for:

• post-accident repairs of the side body section,
• mechanical damage or acts of vandalism,
• vehicle restoration while maintaining original design solutions.

Before installation, a standard inspection of the edges, glass surface, and compatibility with existing seals and trim strips is recommended.

Related components and further reading

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

When selecting body components from the aftermarket, it is worth learning about the specifics of regeneration and selection of dismantled parts – you will find practical tips in the article Replacing body parts with used ones – can dismantled body parts look like new?, which discusses the approach to the quality of used components in popular brands, including Mercedes.

If you want to reduce the vehicle's downtime in the workshop and plan repairs optimally, the guide how a wide assortment in one warehouse actually shortens your car's downtime at the mechanic, describing the benefits of using well-stocked suppliers of used parts, may also be helpful.