Mercedes-Benz E-Class A207 Rear Left N/S Door Window Rail Sealing Strip

The Mercedes E-Class A207 Rear Left Door Window Regulator Seal is an original body part designed for precise sealing and guiding of the window in the door. Thanks to its factory fit for the specific E-Class convertible/coupe model, it ensures stable window operation and limits water and noise ingress into the vehicle's interior. This is a practical solution for users who want to maintain proper window functionality and the aesthetic of the vehicle's side body.

Specifications and technical data

• SKU: A2076730321
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2076730321
• Substitutable numbers: A2076730321, A 207 673 03 21, KZ
• Location on the vehicle: Rear, Left
• Category: Door Seals

Purpose and Fitment

The presented rear left door window regulator seal has been specifically designed for the Mercedes E-Class A207 body type. The component is installed in the rear left part of the vehicle and works with the door window, stabilizing its vertical movement. The seal's construction is adapted to the factory shape of the door frame, which facilitates installation and helps maintain the original body lines.

Its placement in the rear driver's side area of the vehicle makes the component significant for both the comfort of rear passengers and the overall rigidity and sealing of the vehicle's side body. Proper seal fitment reduces window vibrations, minimizing the risk of rattling and wind noise during high-speed driving.

Technical Function and Benefits of Installation

The seal serves simultaneously as a window regulator and a sealing element. It is responsible for:

• stable vertical guidance of the window during opening and closing,
• limiting the ingress of rainwater into the door interior,
• reducing cabin noise by sealing the contact between the window and the frame,
• reducing the load on the window lifting mechanism through proper guidance.

Replacing a worn or deformed seal with a functional component restores proper window operation, which is particularly important in frameless door vehicles where precise window positioning significantly impacts acoustic comfort and moisture protection.

Characteristics of an Original Mercedes Part

The offered seal comes from the Door Seals group and is a Mercedes brand element, meaning it adheres to factory manufacturing standards and geometry. The original design ensures:

• compatibility with factory mounting points in the door,
• an appropriate profile matched to the shape of the window and frame,
• a cohesive appearance with other door trim elements.

The product is used, allowing for an economical repair while maintaining the original manufacturer's specifications. This is a sensible solution for drivers who want to restore proper window operation without the need to invest in a new part.

Application in Service Practice

The installation of this seal is particularly recommended in situations where symptoms such as:

• excessive wind noise around the rear left door,
• a loose or rattling window when driving over uneven surfaces,
• traces of water or moisture in the lower part of the door,
• difficult operation of the window lifting mechanism.

Replacing the component with an original regulator seal restores the correct window-to-body fit and relieves the lifting mechanism. This helps to limit further wear on components and improve the daily comfort of using the vehicle.

Complementary Mercedes Door Seals

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other elements from the same group, such as additional frame seals, weatherstripping, or window guide profiles, check the available parts in the Mercedes Door Seals category.

To better plan your repair budget and make informed choices when selecting used OEM parts, it is worth familiarizing yourself with a guide describing how to wisely use the second-hand parts market – you can find practical tips in the article Rising Repair Costs and the Boom in Used Parts – How to Save on Car Servicing?.