Mercedes W639 Side Rail Cover Rear Left N/S Arctic White 9147

Visual condition of the part

Possible scratches and paint chips – condition as shown in the product photos.

Mercedes W639 Left Rear Sliding Rail Cover White is a body part from the Doors and Door Panels category, designed for installation on the rear left side of the vehicle. The cover in Arctic White - 9147 allows for an aesthetic finish of the side rail and maintains a consistent body line in Mercedes W639 models.

Specifications and technical data

• SKU: A6396913208-ARW
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6396913208
• Substitutable numbers: A6396913208, A 639 691 32 08
• Location on the vehicle: Rear, Left
• Color: Arctic White - 9147
• Category: Doors & Door Skins

Intended Use and Function of the Part

The presented left rear sliding rail cover is designed as a dedicated component for the door area in the Mercedes W639. Mounted on the rear left side of the body, it is responsible for:

• covering the guide/rail in the rear door area,
• protection against dirt and external factors,
• visual tidiness of the vehicle's side,
• maintaining the correct geometry of the door assembly and body panels.

Thanks to its specific fit for the W639 body model, the cover ensures proper alignment with other panels and door components, which facilitates installation and reduces the need for additional modifications.

Color and Visual Matching

The cover is made in the shade of Arctic White - 9147, which allows for color consistency with the factory body paint in this color. In practice, this means:

• easier matching with the existing paint coating,
• no need for immediate painting if the color matches,
• an aesthetic finish of the vehicle's side after body repair or part replacement.

Its placement on the vehicle's rear left side allows for precise restoration of the original assembly after a collision, corrosion, or other operational damage.

Installation Characteristics

The cover belongs to the group of body parts in the Doors and Door Panels category, meaning it is designed to work with the factory mounting points in the Mercedes W639. Proper structural fit facilitates:

• installation in place of the original cover without interfering with the body structure,
• maintaining the correct operation of doors and guides,
• reducing the risk of play, vibrations, and unwanted noises during driving.

As a used part, it allows for economical vehicle repair while maintaining the original geometry and characteristics of the side assembly.

Practical Application and Benefits of Replacement

The use of this cover is particularly beneficial in situations where the existing part has suffered mechanical damage, deformation, or corrosion. Replacement allows for:

• restoring the correct appearance of the vehicle's side,
• protecting the rail and door mechanisms from contamination,
• reducing the risk of accelerated wear of moving parts in the door area.

For users seeking a cost-effective solution, a used part offers a balanced compromise between price and functionality, while maintaining proper fit for the specific Mercedes model.

Part Selection and Additional Information

To correctly select the cover for a specific body version, it is worth paying attention to parameters such as vehicle placement, color, and brand. If in doubt, it is helpful to compare the shape and mounting points with the part currently installed on the vehicle.

If you are considering purchasing other body parts related to door, sill, or side panel assemblies for your Mercedes, check the available parts in the Mercedes Doors and Door Panels category.

For drivers analyzing whether original, aftermarket, or used parts are a better choice, an article comparing costs, quality, and fit by OEM numbers may be helpful, available here: Original, Aftermarket, or Used – Which Car Parts Are Most Cost-Effective?.