Mercedes W251 Rear Quarter Window Seal Sealing Gasket Left N/S A2517680424

The Mercedes W251 Rear Body Window Seal Left is a precisely fitted body part designed for installation in the rear left section of the vehicle. It is responsible for creating a watertight seal between the window and the body, which translates to protection of the interior from water, noise, and dirt. Its original Mercedes origin ensures correct geometry, stable window seating, and compliance with factory safety standards.

Specifications and technical data

• SKU: A2517680424
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2517680424
• Substitutable numbers: A2517680424, A 251 768 04 24
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and Function of the Rear Window Seal

The presented seal is a component from the Window and Trim Seals group, specifically designed for the rear left window of the W251 series body. Its purpose is to:

• maintain a watertight seal between the window and the body in the rear part of the vehicle,
• limit the penetration of water, moisture, and dust into the interior,
• reduce air noise and vibrations in the rear window area,
• stabilize the window edges relative to the body frame.

Thanks to its proper profile, the seal works with the factory window mounting, facilitating correct installation and maintaining adequate pressure along the entire edge.

Construction and Fit for Mercedes W251 Body

The rear body window seal has been developed with the specific geometry of the Mercedes W251 body in mind, taking into account the characteristic shape of the vehicle's rear. The appropriately profiled working cross-section ensures:

• secure adhesion to the window and body edges on the left side,
• even pressure distribution along the entire working perimeter,
• compatibility with factory mounting points and seal guides.

Such a fit minimizes the risk of leaks after window replacement or bodywork repairs in the rear section, and also helps maintain a cohesive look of the vehicle's side profile.

Benefits of Using an Original Mercedes Seal

Using an original rear window seal in the Mercedes W251 allows for the preservation of parameters intended by the vehicle manufacturer. In practice, this means:

• stable window operation without unwanted play and creaks in the rear left body area,
• better cabin acoustic insulation compared to universal parts,
• visual consistency with other body seals and trims,
• reduced risk of body edge corrosion due to proper water drainage.

This solution is particularly recommended after window replacement, accident repairs, or during the renovation of the vehicle's rear area, where the seal and durability of the window-to-body connection are crucial.

Item Condition and Service Application

The seal is offered in used condition, making it an attractive option for service repairs where originality and cost control are important. This type of component is suitable for both replacing a damaged or leaking seal and for reconstructing the rear body section after a collision.

Before installation, a standard inspection of the contact surfaces of the window and body is recommended, along with cleaning the edges of any old seal residue and dirt, which will allow for the full utilization of the element's sealing properties.

Expanding Body Seal Work

If you are planning a comprehensive repair or modernization of the window and glazing areas of your Mercedes and need other parts from the same group, such as additional side window seals, trim strips, or window frame seals, check the available parts in the Mercedes Window and Trim Seals category.

To better plan service work on the body and cooperating systems, it is also worth familiarizing yourself with the guide on the impact of temperature and operating conditions on vehicle components – practical tips can be found in the article Engine Cooling System – Overheating, Repair, and Used Radiators.