Mercedes GLA X156 Window Guide Rail Seal Door Rear Left N/S A1567350125

Mercedes GLA X156 Window Guide Rail Seal Door Rear Left N/S is an original body component from the Window seals and trims group, designed for the rear left door of the GLA X156 model. The precisely shaped window guide profile ensures stable glass movement, reduces cabin noise, and supports the proper operation of the window lifting mechanism.

Specifications and technical data

• SKU: A1567350125
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1567350125
• Substitutable numbers: A1567350125, A 156 735 01 25
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and function of the guide rail seal

The presented guide rail seal has been designed specifically for the rear left door window in the Mercedes GLA X156 generation. Its task is to keep the window in the correct position while raising and lowering, as well as to reduce lateral play that could cause rattling, vibrations, or leaks.

Thanks to the appropriately selected geometry and material flexibility, the seal works with the door frame and the window regulator mechanism, improving acoustic comfort inside the vehicle and protection against water and contaminants. This is particularly important in premium-class cars, where stable window operation and consistent ride quality are expected.

Benefits of using an original Mercedes seal

Using an original guide rail seal in the GLA X156 translates into a number of practical benefits:

• precise fit to the shape of the door frame and window, without the need for assembly modifications,
• preservation of the factory window guidance geometry, which reduces the risk of misalignment,
• reduction of wind noise at higher speeds due to proper pressure against the glass,
• better protection of the door interior against moisture, which promotes the durability of the window regulator mechanism and electrical installation.

The element from this group is particularly important in cases of symptoms such as a stiff window, noticeable play, knocking when closing the door, or leaks appearing in the area of the rear left window.

Assembly characteristics and application

The rear left door window guide rail seal in the GLA X156 is designed as a component dedicated to a specific location on the vehicle, which facilitates service and reduces the time required for replacement. Proper fitment with the door frame allows for installation in accordance with the service procedure without the need to adjust universal profiles.

When replacing, it is worth paying attention to:

• the condition of the contact surface in the door frame,
• correct positioning of the seal around the entire window guide circuit,
• freedom of window movement after installation – without jamming or excessive resistance.

This approach allows for restoring the proper operation of the window lifting mechanism and reducing the risk of premature wear of the components.

Condition and use in vehicle service

The offered guide rail seal comes from a used vehicle, which makes it an attractive solution for economic repairs when the priority is to maintain the original specification at reasonable costs. Such elements are often chosen in the case of local damage, point wear, or after bodywork and paint repairs in the area of the rear left door.

Replacement of the guide rail seal is recommended especially when the following occur:

• increased resistance of the window operation in the rear left door,
• friction noises or rattling during window movement,
• leaks and noise in the area of the rear left window.

Complementary Mercedes window seals and trims

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

Technical support and service knowledge

When planning repairs in the area of the bodywork and associated systems, it is worth using reliable sources of technical knowledge. For users interested in a broader view of part selection, compatibility, and the importance of OEM and reference numbers, our guide on selecting components for BMW units may be helpful, available in the article BMW B58 code – checklist before buying a turbocharger and intercooler. Although it concerns a different brand and group of elements, it well demonstrates the approach to verifying part compatibility and working with catalog numbers, which should also be applied when selecting seals and trims for a Mercedes.