Mercedes ML W163 Front Door Seal Right O/S A Pillar Rubber Gasket A1637200878

The Mercedes R170 Front Right Door Window Seal is a precisely profiled component from the Door Seals group, designed for installation on the front right door. It is responsible for ensuring a tight seal for the window, reducing noise, and protecting the interior from water and dirt, while ensuring stable operation of the window regulator.

Specifications and technical data

• SKU: A1637200878
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1637200878
• Substitutable numbers: A1637200878, A 163 720 08 78
• Location on the vehicle: Front, Right
• Category: Door Seals

Purpose and Function of the Seal

The seal described is dedicated to the front right door area in Mercedes R170 vehicles. Its purpose is to maintain proper window guidance within the door frame, which translates to stable operation of the window regulator and even sealing around the entire perimeter.

Thanks to its appropriately selected profile and material flexibility, the seal limits the ingress of water, dust, and air drafts into the cabin, and also reduces aerodynamic noise at higher speeds. This is an important element for both acoustic comfort and the protection of upholstery and electrical installations within the door.

Construction and Body Fitment

The geometry of the seal has been designed for the specific shape of the door frame and window in Mercedes R170 models, allowing for a secure fit in the mounting groove without the need for modifications. Appropriately shaped edges interact with the window during its raising and lowering, minimizing the risk of jamming and uneven pressure.

The component is prepared for installation in the front – right side position, which eliminates the problem of universal, ill-fitting profiles. Proper alignment of the seal with the door frame helps maintain the original body line and the correct operation of the door locks and window guides.

Benefits of Replacing the Window Seal

Replacing a worn or perished seal with a functional component from the same construction group allows for the restoration of original sealing parameters and vehicle comfort. Key benefits include:

• limiting water ingress into the door and cabin,
• reducing cabin noise at higher speeds,
• more stable window guidance in the track,
• reduced load on the window regulator mechanism,
• improved overall door operation on the passenger side.

For users who value maintaining the original characteristics of their vehicle, using a dedicated seal is a more predictable solution than installing universal replacements.

Characteristics of a Used Part

The seal is a used part, meaning it has been removed from a vehicle but remains functional in terms of its sealing role. Such components are often chosen for maintenance repairs when preserving original geometry and compatibility with factory design solutions is a priority.

For door seals, it is important that the profile retains its flexibility and working shape – this allows for its re-use in a vehicle without loss of basic performance characteristics. This is a practical solution for localized repairs, e.g., after mechanical damage or bodywork and paint intervention.

Complementary Mercedes Door Seals

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

Technical Support and Additional Knowledge

For larger service projects, including drivetrain or power transmission components, specialized knowledge regarding gear ratio selection and component compatibility can be helpful. In such cases, it is worth consulting the guide article Used Drive Axles and Differentials – How to Choose Gear Ratios for Your Driving Style, which clearly explains key technical issues related to used components.