Mercedes X164 Rear Door Window Sealing Rail Channel Inside Left N/S A1647351165

Mercedes X164 Rear Door Window Sealing Rail Channel Inside Left N/S is a factory body component from the Window seals and trims group, designed for the rear left door area in Mercedes vehicles. It is responsible for precisely wiping water from the glass and ensuring stable guidance within the channel, which improves acoustic comfort and limits moisture ingress into the interior.

Specifications and technical data

• SKU: A1647351165
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1647351165
• Substitutable numbers: A1647351165, A 164 735 11 65
• Location on the vehicle: Rear, Left
• Part type: Inner Beltline Seal
• Category: Window Seals, Gaskets & Trims

Purpose and function of the sealing rail

The described sealing rail is mounted on the rear left side and works with the door window, creating a tight, mechanical seal at the junction of the glass and the door panel. Thanks to its properly profiled working edge, it reduces the accumulation of water and dirt on the glass surface, which promotes smooth operation and reduces the risk of internal fogging. This component also supports maintaining the correct pressure of the glass against the guides, which is important for reducing cabin noise and ensuring glass stability at higher speeds. A properly selected sealing rail helps maintain the factory-standard operation of the window lifting mechanism.

Benefits of using an original Mercedes rail

Using an original sealing rail in the rear left part of the body ensures:

• Precise fit to the door profile – the component is designed for the specific body geometry of the Mercedes X164, which facilitates installation and ensures a stable fit.
• Consistency with the factory sealing system – the rail works with other door seals, maintaining the water drainage system intended by the manufacturer.
• Reduction of air drafts and noise – proper pressure against the glass affects acoustic comfort inside the vehicle.
• Support for the durability of the window lifting mechanism – lower resistance to glass movement translates into smoother operation of the regulator.

Installation and operational characteristics

The rail is intended for installation inside the door in the rear left part of the vehicle, in the factory mounting location. The design, intended for a specific body generation, facilitates installation in place of a worn component without the need for modifications or fitting universal replacements. As a part from the Window seals and trims category, the element contributes to the system of protection against moisture and dirt around the side windows. Replacing a worn rail with a functional component allows for restoring proper water drainage from the glass surface and limiting the risk of moisture entering the door interior, which is significant for the durability of metal components and electrical connectors located in this area.

Product condition and service application

The offered sealing rail comes from disassembly and is intended for users looking for an economical yet vehicle-compliant service solution. It is particularly useful for:

• repairs after collisions in the rear left part of the body,
• eliminating leaks around the door window,
• renovating the window sealing system in vehicles operated in harsh weather conditions. By maintaining the original geometry and purpose, the rail allows for restoring proper window operation and the aesthetic appearance of the window edge without interfering with the door structure.

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 sealing rails, window frame seals, or finishing profiles, check out the available parts in the Mercedes Window seals and trims category.

Technical support and service knowledge

When selecting parts from disassembly, many users also pay attention to fuel system components. To better plan your repair budget and safely use used parts, it is worth reading the guide on purchasing fuel components: Fuel dosing problems – how to choose a used injection pump and fuel rails.