Window Guide Mercedes ML 350 W166 Rear Door Right O/S Rail Seal A1667351025

Mercedes ML 350 W166 Window Seal Door Guide Rear Right is an original body part from the Window Seals and Trim group, designed for the rear right door area. It ensures stable window guidance and a tight seal, which translates to reduced noise, improved acoustic comfort, and protection of the interior from moisture.

Specifications and technical data

• SKU: A1667351025
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667351025
• Substitutable numbers: A1667351025, A 166 735 10 25, A1667352600, A 166 735 26 00
• Location on the vehicle: Rear, Right
• Category: Window Seals, Gaskets & Trims

Vehicle Application and Function

The presented window guide is dedicated to the rear right door wing of the Mercedes ML 350 W166 generation. The element is responsible for precise window guidance within the channels and maintaining appropriate pressure against the door frame, which is crucial for sealing and proper operation of the lifting mechanism.

Thanks to its proper profile and fit to the door construction, the seal reduces window vibrations, minimizes the risk of misalignment, and supports even force distribution during window opening and closing.

Benefits of Using an Original Seal

Using the original guide in the Mercedes ML 350 W166 allows for the preservation of factory window mechanism performance parameters and door finish aesthetics. Compared to aftermarket alternatives, the correct fit of shape and material flexibility translates to:

• stable window guidance throughout the entire range of motion,
• better cabin acoustic insulation,
• reduction of air drafts at higher speeds,
• reduced risk of accelerated wear on the window regulator.

Its placement on the rear right side of the vehicle makes this part significant for both passenger comfort and protection of upholstery and electrical installations in the door from moisture.

Installation Characteristics

The rear right door window seal guide has been designed as a part compatible with the factory door construction of the Mercedes ML 350 W166. Its appropriate profiling and mounting points facilitate installation in place of a worn-out element, without the need for structural modifications to the door.

When replacing, it is recommended to:

• check the condition of the window regulator mechanism,
• inspect the guides and mounting points for dirt,
• ensure the seal is precisely seated in its groove to avoid leaks.

This approach allows for restoring proper window operation and reducing the need for future adjustments.

Product Condition and Service Application

The offered guide is a used part, making it an attractive service solution for users seeking parts with factory geometry at a reasonable budget. It is suitable for standard replacement of worn seals, as well as for repairs after minor collisions or bodywork interventions in the rear right body area.

It is always advisable to verify the correct seal selection for a specific vehicle configuration using the OEM number or specialized catalogs to ensure full compatibility with the given equipment version.

Related Parts and Further Information

If you are planning a comprehensive repair or upgrade of the window area in your Mercedes and require other parts from the same group, such as additional window frame seals, trim strips, or guides for other doors, check the available parts in the Mercedes Window Seals and Trim category.

For more information on selecting used OEM parts by part number and how it affects the durability and performance of powertrains, read the article: The Five-Cylinder Audi Engine – A Legend from Quattro to RS3 and How to Care for It with Genuine Audi Parts.