Mercedes W251 Rear Door Frame Edge Seal Left Right N/O/S Gasket A2516970351

Mercedes W251 Rear Door Frame Edge Seal Left Right N/O/S Gasket is an original component from the Door seals group, designed for installation on the rear edge of the vehicle body. It ensures a tight closure of the door leaf, reduces road noise, and improves protection of the interior against water and contaminants. Thanks to its factory profile and fitment for the W251 structure, the seal allows for restoring proper door operation on either the left or right side.

Specifications and technical data

• SKU: A2516970351
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2516970351
• Substitutable numbers: A2516970351, A 251 697 03 51
• Location on the vehicle: Rear, Right, Left
• Part type: Door Seal
• Category: Door Seals

Purpose and vehicle placement

The presented seal is designed for installation in the rear part of the body, on the edge of the door frame on the left or right side. It is responsible for the tight fit of the door leaf against the bodywork, stabilizes the door position when closed, and limits the penetration of vibrations and noise into the passenger cabin. The use of a dedicated cross-section profile allows for proper interaction with factory hinges, the lock, and interior trim.

Sealing function and acoustic comfort

The rear door frame edge seal plays a key role in the vehicle's side sealing system. It is responsible for:

• limiting the ingress of rainwater and road spray into the vehicle interior,
• reducing aerodynamic noise and road noise in the rear part of the cabin,
• stable guidance of the door leaf in the closed position,
• reducing the risk of corrosion in the sill area and at the door edges.

By maintaining the factory shape and flexibility, the component allows for restoring original sealing parameters, which translates into higher acoustic comfort and better protection of the upholstery and electrical wiring in the rear part of the interior.

Original origin and fitment for Mercedes W251

The seal has been developed with the Mercedes W251 body structure in mind, which guarantees proper fitment to the bodywork contours, bending radii, and mounting points. Its original origin translates into:

• material consistency with other seals in the vehicle,
• proper adhesion along the entire length of the door frame,
• no need for modifications or trimming of the profile,
• preservation of the factory gap geometry between the door and the body.

Thanks to this, the installation is predictable, and after replacement, you can achieve stable and repeatable door pressure without excessive strain on the hinges and the lock.

Performance characteristics of the used component

The offered seal comes from dismantling, which means it is a used component that retains its functionality in terms of sealing and fitment to the body. This type of component is a good solution in situations where the existing seal has been mechanically damaged, deformed, or has lost its flexibility due to wear. Choosing an original used component allows you to maintain consistency with the vehicle's other seals while maintaining a favorable cost-to-quality ratio.

Selection support and additional technical information

When selecting a seal for a specific body version, it is worth verifying compatibility with the manufacturer's markings and the placement on the vehicle (rear, left/right side) to avoid installation problems. If necessary, data such as the OEM part number, interchangeable numbers, or the SKU designation can be helpful, as they allow for unambiguous identification of the component in technical catalogs.

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 additional edge seals, weatherstrips, or pillar seals, check the available parts in the Mercedes door seals category.

For users interested in mechanical modifications and increasing performance, guide materials may also be useful – you can find more on safe power increases and purchasing used components in the article 2.5 TFSI DAZA – how to safely increase the power of an Audi RS3 by buying used turbochargers.