Mercedes W177 Rear Door Frame Edge Seal Left Right N/O/S Gasket A1776920300

Mercedes W177 Rear Door Seal Left Right is an original part from the door seals category, designed for installation on the rear axle of the vehicle on the left or right side. Thanks to its factory fit, it ensures a tight door closure, reduces road noise, and improves acoustic comfort and interior protection against moisture.

Specifications and technical data

• SKU: A1776920300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1776920300
• Substitutable numbers: A1776920300, A 177 692 03 00
• Location on the vehicle: Rear, Right, Left
• Category: Door Seals

Vehicle Application and Placement

The seal has been specifically designed for the rear body of the Mercedes W177 class, with the possibility of installation on both the left and right sides. This solution facilitates the selection of the correct part for body repairs and maintains the structural integrity of the factory sealing system.

Thanks to its precise profile and appropriate shape, the seal works with the original door frame, ensuring proper pressure along the entire perimeter. This is crucial for:

• limiting air drafts at higher speeds,
• reducing external cabin noise,
• protecting sills and lower door edges from water and dirt.

Technical and Functional Characteristics

As an original Mercedes part, the seal retains factory parameters of flexibility and fit to body contours. The appropriately selected rubber compound ensures stable adhesion to the sheet metal and door panel, which translates to long-lasting system sealing.

Key functional features:

• compatibility with rear doors on both sides of the vehicle,
• maintenance of correct geometry after installation,
• possibility of use in accident repairs and replacement of worn seals.

By using an original seal, the factory level of acoustic insulation can be maintained, and the risk of window fogging and upholstery dampness can be reduced.

Product Condition and Service Application

The offered seal is a used part, allowing for economical repair while maintaining original manufacturing quality. This is a practical solution in situations where the factory seal has suffered mechanical damage, deformation, or lost its elasticity due to wear.

The product is particularly suitable for:

• body repairs after collisions,
• restoring door seal after replacing sheet metal or adjusting hinges,
• fleet vehicle service, where assembly consistency and predictability are important.

Why Choose Original Mercedes Door Seals

Using original seals on the Mercedes W177 allows for the maintenance of manufacturer-designed comfort and durability parameters. OEM door seals are tailored to the specific body geometry, thereby minimizing the risk of leaks, creaks, or improper door closure after installation.

If you need other Mercedes door seals, check the available products in our dedicated category: Mercedes door seals. There you will find a wide selection of body parts that will facilitate comprehensive repair of the door area.

More About the Advantage of Original Used Parts

For body and powertrain components, choosing original used parts often proves more beneficial than installing unreliable aftermarket alternatives. You can read about why used factory components can be a better investment in the article: Whining differential? Find out why a used OEM drive axle is a better investment than an unreliable replacement. The information contained there clearly shows the importance of structural integrity and material quality in other vehicle components as well.