Mercedes R171 C-Pillar Column Roof Trim Obsidian Black Left N/S A1717940128

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes R171 C-Pillar Column Roof Trim Obsidian Black Left N/S is an original body component designed for the C-pillar area of a convertible, specifically engineered for Mercedes vehicles. This precisely molded trim provides an aesthetic finish to the side of the body and ensures stable guidance for the roof edges and seals in the rear section of the vehicle. Finished in Obsidian Black Metallic, it allows for a seamless match with the factory body paint.

Specifications and technical data

• SKU: A1717900319-OB
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1717900319
• Substitutable numbers: A1717900319, A 171 790 03 19, A1717940128, A 171 794 01 28
• Location on the vehicle: Left
• Color: Obsidian Black Metallic - 197
• Category: Hardtops, Roof Panels & Parts

Purpose and function of the component

The C-pillar trim plays an important role in the side body area of a convertible, where the roof folds and interacts with the rear part of the bodywork. This component:

• masks the C-pillar structure, improving the visual continuity of the body lines,
• supports the guidance of seals and linings in the folding roof area,
• limits the ingress of dirt into the space under the paneling,
• stabilizes the side finish in the rear cabin area.

The left-side placement ensures a perfect fit for the specific body geometry, which translates into proper alignment with adjacent panels and roof components.

Color and visual fit

The Obsidian Black Metallic finish allows for consistency with the factory Mercedes paint palette, especially in vehicles finished in dark, metallic tones. As a result, the trim does not visually stand out from the rest of the body after installation, and the side line remains uniform and orderly.

The metallic structure of the paint promotes an even distribution of light reflections, which is crucial in a convertible where side surfaces are highly exposed both with the roof closed and open.

Installation characteristics

The C-pillar trim has been designed as a component dedicated to the specific construction of the convertible roof, which facilitates installation in the factory location. Properly shaped edges work with the body mounts and adjacent panels, minimizing the need for additional bodywork adjustments.

The left side is clearly defined, which reduces the risk of error when selecting parts and allows for maintaining the correct geometry of the side line after replacing a damaged component.

Condition and practical application

The component comes from the secondary market, making it a reasonable choice for accident repairs, body restoration, or returning the vehicle to a factory-like condition without the need to invest in a new component. Its original origin promotes the preservation of the correct shape, rigidity, and compatibility with factory mounting points.

The trim will work well both for local repair of a damaged C-pillar and for comprehensive restoration of the roof area in a convertible, where maintaining the correct fit of moving and fixed elements is key.

If you are planning a comprehensive repair or upgrade of the convertible roof area in your Mercedes and need other elements from the same group, such as covers, guides, or additional trims, check the available parts in the Convertible roofs, cars and parts Mercedes category.

Technical support and additional knowledge

When working on a convertible body, there is often a need for parallel inspection of systems responsible for vehicle handling, especially after road incidents or major repairs. To better understand the relationship between body components and steering precision, it is worth consulting the guide Steering system and power steering – how it works and what breaks?, which helps organize knowledge about the diagnostics and operation of key components.