Mercedes X253 Seal Rail Trim Door Window Outer Rear Left N/S A2537350325

Mercedes X253 Seal Rail Trim Door Window Outer Rear Left N/S is an original body component from the Door seals group, designed for installation in the rear left part of the vehicle. It ensures tight window guidance, reduces wind noise, and protects the interior from moisture and contaminants. This is a practical solution for users who want to restore the proper operation of the side window and maintain factory acoustic comfort.

Specifications and technical data

• SKU: A2537350325
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2537350325
• Substitutable numbers: A2537350325, A 253 735 03 25
• Location on the vehicle: Rear, Left
• Category: Door Seals

Purpose and vehicle placement

The seal rail trim has been designed specifically for installation in the rear zone, on the left side of the body. It is responsible for guiding and sealing the side window, working in conjunction with the window lifting mechanism and the structure of the door or side body panel. Thanks to its precise profile, it fits the edges of the glass and the bodywork, which reduces the risk of rattling, looseness, and unwanted vibrations while driving.

Sealing function and body protection

The component performs several key operational functions:

• stabilizes the window in the guide, improving its smooth movement up and down,
• creates a barrier against water, dust, and road salt, which supports the protection of the door edges and the interior,
• reduces air noise at higher speeds, improving the acoustic comfort of the cabin,
• helps maintain proper thermal insulation in the rear part of the vehicle.

A well-chosen rear left window seal is important both for driving comfort and for the long-term protection of upholstery elements and electrical installations located in the door.

Characteristics of the original Mercedes component

The seal rail trim comes from the Mercedes range, which means maintaining factory geometry, the correct rubber profile, and compatibility with the X253 series body structure. Original manufacturing facilitates installation and allows for proper fitment with the glass and adjacent body elements, without the need for modifications or adjustments required by aftermarket replacements.

The product is offered as a used part, which in practice allows for an economical repair while maintaining parameters close to factory specifications. This is a beneficial solution in situations where the existing seal is worn, brittle, deformed, or mechanically damaged, and the goal is to restore the proper operation of the window and the tightness of the body.

Installation and service application

Due to its dedicated placement in the rear left part of the vehicle, the seal rail trim is intended for direct replacement in place of the factory element. During installation, it is worth paying attention to:

• thorough cleaning of the contact surface in the door or side panel,
• correct seating of the seal in the socket and guides,
• checking the smoothness of the window operation after installation, ensuring there are no jams or excessive resistance.

Such a replacement allows for restoring proper tightness and comfort of using the rear window on the driver's or passenger's side, depending on the vehicle configuration.

Repair expansion – Mercedes door seals

If you are planning a comprehensive repair or upgrade of the door zone in your Mercedes and need other elements from the same group, such as additional trims, perimeter seals, or window guide seals, check the available parts in the Mercedes door seals category.

If you are considering a broader vehicle upgrade and want to better understand the selection of used components by identification numbers, you will find practical tips in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?