Mercedes W166 Sealing Rail Outer Door Rear Right O/S Moulding Strip A1667357000

Mercedes W166 Sealing Rail Outer Door Rear Right O/S Moulding Strip is an original body component from the Protective and decorative strips group, designed for installation on the rear right door. It ensures effective water drainage from the window and provides an aesthetic finish to the door edge, which translates into stable operation of the window lifting mechanism and a consistent look for the side of the vehicle body.

Specifications and technical data

• SKU: A1667357000
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667357000
• Substitutable numbers: A1667357000, A 166 735 70 00
• Location on the vehicle: Rear, Right
• Category: Body Mouldings & Trims

Purpose and function of the sealing rail

The presented sealing rail has been designed specifically for the rear right side of the body in Mercedes W166 series models. Its task is to precisely collect water and debris from the window surface during raising and lowering, which reduces the risk of scratches and prevents moisture from entering the door interior.

Thanks to its tailored profile and factory geometry, the component works perfectly with the window and door seals, stabilizing its guidance and supporting the proper operation of the window regulator.

Construction and body fitment

The rail belongs to the Protective and decorative strips group, combining a sealing function with an aesthetic finish for the door edge. The construction provided by the vehicle manufacturer ensures:

• precise adhesion to the door panel on the outer side,
• stable window guidance in the rear right part of the body,
• visually consistent side line flow characteristic of the W166 series.

The original origin of the component means maintaining the correct rigidity, shape, and mounting points, which facilitates installation and limits the need for additional bodywork adjustments.

Benefits of using an original Mercedes rail

Using a factory sealing rail in the rear right part of the body allows for maintaining proper window operation parameters and door tightness. Key advantages include:

• Protection of the window mechanism – limiting the ingress of water and dirt into the door interior, which promotes a longer service life for the guides and the regulator.
• Better door area tightness – support for the sealing system, which helps reduce noise and moisture in the cabin.
• Consistent body aesthetics – maintaining the original finish line of the side bodywork, with no differences in shade or shape compared to other elements.

The component in used condition allows for an economical repair while maintaining mounting parameters consistent with the manufacturer's factory specifications.

Selecting parts by OEM number and VIN

To ensure full compatibility of the sealing rail with a specific equipment version and vehicle year, it is worth verifying compliance using the OEM number and VIN. A practical guide may be helpful – a detailed description of verification steps, examples of inquiries to the seller, and checklists can be found in the article Guide: how to choose the right car part by VIN and OEM number.

Expanding the door area and related components

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 covers, overlays, or additional strips, check the available parts in the Mercedes protective and decorative strips category.

Summary

Mercedes W166 Sealing Rail Outer Door Rear Right O/S Moulding Strip is a practical body component that combines a protective function with an aesthetic finish for the side of the vehicle. The original construction intended for the rear right side ensures proper window guidance, supports door tightness, and allows for restoring the factory look of the body after bodywork repairs or the replacement of damaged components.