Mercedes W177 Moulding Trim Water Deflector Left N/S Roof Rail A1776902900

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W177 Moulding Trim Water Deflector Left N/S Roof Rail is an original body component designed for installation on the left side of the windshield in W177 series models. Its precisely matched geometry and factory-quality workmanship ensure a stable fit for the windshield and an aesthetic edge finish. With this component, you will maintain a consistent body appearance and proper alignment of the windshield sealing line.

Specifications and technical data

• SKU: A1776902900
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1776902900
• Substitutable numbers: A1776902900, A 177 690 29 00
• Location on the vehicle: Left
• Category: Other Exterior Parts & Accessories

Purpose and function of the windshield moulding

The left-side windshield moulding is responsible for the precise finishing of the contact point between the glass and the bodywork, as well as stabilizing its edge. Proper fitment of this element:

• reduces the risk of wind noise at higher speeds,
• supports the correct positioning of seals along the edge of the glass,
• ensures a visually consistent body line in the windshield area,
• facilitates correct installation and servicing of the windshield.

In the event of windshield replacement or repair of the front body section, using a dedicated left windshield moulding allows you to maintain factory-standard fitment and predictable body behavior during operation.

Construction and fitment for the Mercedes W177 body

The moulding has been designed specifically for the W177 series body structure, taking into account the characteristic profile of the pillar and the edge of the glass. The properly shaped cross-section and mounting points allow for:

• stable seating on the left side of the vehicle,
• proper adhesion to the glass and adjacent body components,
• maintenance of uniform assembly gaps.

Thanks to this, the left windshield moulding for the Mercedes W177 serves as a functional addition to the factory windshield mounting system, without the need for body modifications.

Characteristics of the used component

The offered component is in used condition, which in practice means it comes from disassembly and may show signs of previous use consistent with the vehicle's age. Such elements are frequently chosen for:

• post-accident repairs in the windshield area,
• repairing mechanical damage to the left-side moulding,
• restoring the original appearance of the body after windshield replacement.

Choosing a used windshield moulding allows you to maintain the original vehicle specification while optimizing repair costs, which is particularly important in the case of modern body structures.

Application in service practice

The moulding mounted on the left side of the windshield in the Mercedes W177 is an essential element during body and paint work as well as windshield replacement. A correctly selected component:

• facilitates the maintenance of factory reference points during installation,
• minimizes the risk of leaks in the windshield edge area,
• allows for an aesthetic finish to the repair without visible differences in the body line.

By using an original moulding, the service can be carried out based on standard assembly procedures, which promotes repeatability of the final result and reduces the need for additional corrections.

If you are planning a comprehensive repair or upgrade of the body area in your Mercedes and need other elements from the same group, such as covers, mounts, or additional mouldings, check the available parts in the Other Mercedes category.

To compare the characteristics of sports versions of vehicles with advanced drivetrain and braking systems and to better understand the structural differences between standard and sports variants, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which helps to better assess the service requirements of modern cars.