Mercedes W251 Door Gasket Rubber Seal Rear Left Right N/O/S A2516900176

Mercedes W251 Door Seal Left Right Rear is an original part from the Door Seals group, designed for installation in the rear left or right door. It ensures a tight seal of the door leaf, reduces road noise, and improves interior protection against moisture and dirt. This is a practical solution for users who want to restore the factory functionality and acoustic comfort in their Mercedes.

Specifications and technical data

• SKU: A2516900176
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: a2516900176
• Substitutable numbers: a2516900176, a 251 690 01 76
• Location on the vehicle: Rear, Right, Left
• Category: Door Seals

Vehicle Application and Placement

The presented seal is designed for installation in the rear part of the body, on the left or right side door. This design allows the same part to be used on both sides of the vehicle, simplifying part selection during repairs and reducing the risk of error. Its placement in the rear door area directly impacts the comfort of rear passengers, particularly in terms of acoustic insulation and protection against drafts.

Function of the Door Seal in Mercedes W251

The door seal in the Mercedes W251 class is responsible for maintaining proper pressure of the door leaf against the body and for separating the interior from external conditions. A correctly selected and installed part:

• limits the penetration of water and moisture into the interior,
• reduces air noise at higher speeds,
• stabilizes the door's position relative to the body frame,
• affects the smooth operation of locks and closing mechanisms.

Therefore, replacing a worn seal with a functional one restores predictable door behavior, improves driving comfort, and reduces the risk of corrosion in critical areas of the sills and pillars.

Characteristics of an Original Mercedes Part

This seal comes from the line of parts intended for Mercedes vehicles, meaning it retains the correct profile, rubber compound hardness, and geometry tailored to the door construction of the W251 model. The original cross-sectional shape ensures even pressure around the entire perimeter, and the appropriately selected flexibility facilitates installation and subsequent use without excessive strain on hinges or locks.

A part from this group is particularly important in vehicles used daily, where frequent door opening and closing, along with variable weather conditions, accelerate the wear of factory seals. Using a component that matches the body's design avoids problems typical of aftermarket parts with imprecise profiles.

Condition, Installation, and Service Application

The offered seal is a used part, meaning it comes from disassembly and may show signs of previous use while maintaining the functionality required for further operation. This is a solution often chosen by workshops specializing in Mercedes service, where compliance with the factory design and the possibility of economical vehicle repair are paramount.

Replacing the rear body seal is a common service procedure performed when:

• increased air noise occurs during driving,
• there are signs of moisture around the sills or door upholstery,
• there are problems with the proper closing of the door leaf,
• visible cracks or deformations of the old seal are present.

Selecting the correct part from the Door Seals group allows for restoring the seal without needing to modify the body structure.

Repair Extension – Other Mercedes Door Seals

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

For users interested in deepening their knowledge of components affecting vehicle operation, including those related to the combustion system and exhaust emissions, an article describing the specifics of exhaust gas recirculation valves may be helpful – EGR: What it is and why considering used EGR valves is worthwhile.