Roof Air Duct Mercedes Vito W639 Pop-up Roof Rear Air Channel A6398313545

Visual condition of the part

The product shows signs of use visible in the photos.

Roof Air Duct Mercedes Vito W639 Pop-up Roof Rear Air Channel is an original air ventilation system component designed for the rear part of the vehicle body. It ensures organized airflow through the roof ventilation system, which translates into stable thermal conditions and passenger comfort. Thanks to its factory-fit design for the Vito W639, installation is predictable, and integration with other interior components is technically consistent and seamless.

Specifications and technical data

• SKU: A6398313545
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6398313545
• Substitutable numbers: A6398313545, A 639 831 35 45
• Location on the vehicle: Rear
• Category: Trim

Purpose and function of the air duct

The presented air duct operates in the rear part of the vehicle, where it is responsible for directing the airflow within the roof ventilation system. Its task is to provide stable flow guidance, reduce turbulence, and maintain proper ventilation efficiency in the rear zone of the cabin or cargo area. A properly selected duct allows for even air distribution, which is particularly important in commercial vehicles operated in diverse conditions.

Construction and fitment for Mercedes Vito W639

The component has been designed specifically for the roof structure and rear body section of the Mercedes Vito W639. This means:

• geometry matched to factory mounting points,
• duct routing consistent with the original roof ventilation system,
• maintenance of appropriate rigidity while minimizing weight.

As a result, the duct works in harmony with other interior components without causing stress or leaks. Its original Mercedes origin helps maintain the integrity of the entire ventilation system and minimizes the risk of installation issues.

Performance characteristics and installation benefits

As an element from the Trims, moldings, and decorative elements group, the air duct serves both a technical function and organizes the space under the interior trim. Its use allows you to:

• maintain a predictable airflow path in the rear of the vehicle,
• reduce noise resulting from uncontrolled turbulence,
• maintain an aesthetic and organized installation layout under the finishing elements.

Its placement in the rear zone of the vehicle helps improve passenger comfort or the stability of cargo transport conditions, which is significant in the daily operation of a commercial vehicle. The used condition of the part allows for an economical restoration of the ventilation system's efficiency while maintaining the factory design concept.

Condition, verification, and service application

The item comes from dismantling and is offered as a used original component, which is a cost-effective solution for post-accident repairs, replacing damaged ducts, or completing missing parts after interior modifications. This type of component is particularly useful in situations where maintaining compatibility with the factory roof ventilation system is a priority, without the need for aftermarket solutions with uncertain fitment.

Expansion of the finishing system and related elements

If you are planning a comprehensive repair or modernization of the roof finishing zone and the rear body section in your Mercedes and need other elements from the same group, such as covers, moldings, or decorative panels, check out the available parts in the Mercedes Trims, moldings, and decorative elements category.

In the case of intensive vehicle use in high temperatures, it is also worth paying attention to the condition of the cooling system and components responsible for heat dissipation from the engine compartment. Practical tips on selecting used cooling components can be found in the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which will help you better plan service work on your car.