Mercedes W639 Windscreen Air Vent Nozzle Cover Trim Left N/S A6398310000

Mercedes W639 Windscreen Air Vent Nozzle Cover Trim Left N/S is a component from the Dashboard group, responsible for directing the airflow onto the windshield on the driver's side. The precisely matched geometry of the vent supports effective windshield demisting and improves visibility comfort during daily use.

Specifications and technical data

• SKU: A6398310000
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6398310000
• Substitutable numbers: A6398310000, A 639 831 00 00, A 639 831 00 60 9B51, A63983100609B51, A 639 831 00 00 9B51, A63983100009B51
• Location on the vehicle: Left
• Part type: Dashboard Trim
• Category: Dashboard Panels

Purpose and function of the windscreen air vent

The left-side windscreen air vent in the Mercedes W639 model is responsible for the proper distribution of air from the ventilation and heating system onto the surface of the windshield in the driver's zone. A properly functioning vent in this area reduces fogging, facilitates quick defrosting, and stabilizes airflow in the upper part of the cockpit.

Thanks to its dedicated shape and fitment to the specific dashboard, the vent works with the air ducts without the need for modifications, maintaining the factory airflow characteristics. This is particularly important for maintaining ergonomics and driving safety in difficult weather conditions.

Construction and fitment to the dashboard

The element has been designed as an integral part of the upper dashboard area, taking into account the shape of the cowl and the line of the windshield. The construction of the vent allows for stable seating in the factory mounting points, which minimizes the risk of looseness, rattling, and unwanted vibrations while driving.

Precise fitment with the dashboard surface allows for a consistent interior appearance, without visible gaps or assembly inaccuracies. This solution is particularly important during post-accident repairs or when replacing components after windshield removal.

Assembly and operational characteristics

The left-side windscreen air vent is designed for installation in the factory location on the driver's side, utilizing the original geometry of the air ducts. This facilitates service work and shortens replacement time compared to universal or adapted components.

• Compatibility with the ventilation and heating system intended for the dashboard of the given model.
• Stable seating in the cockpit structure, reducing airflow noise.
• Maintenance of the factory airflow direction onto the windshield in the driver's zone.

By maintaining the original design, the element allows for the restoration of proper vent operation after interior repairs, windshield replacement, or dashboard modernization.

Condition of the item and service application

The offered vent belongs to the group of used parts, which makes it an attractive solution for the economical repair of the ventilation system in the Mercedes W639. This type of component is particularly useful for:

• repairs after mechanical damage to the dashboard,
• replacing missing elements after windshield or cowl removal,
• restoring full functionality of the ventilation in the driver's zone.

Using an original vent from the same model group allows for maintaining the visual consistency of the cockpit and the correct airflow parameters without the need for system modifications.

Related items from the dashboard group

If you are planning a comprehensive repair or modernization of the cockpit area in your Mercedes and need other elements from the same group, such as air ducts, covers, or top panels, check the available parts in the Mercedes Dashboards category.

For those interested in a wider use of dismantled parts in modernization and tuning projects, practical tips on selecting components can be found in the article Emotions and design – visual and mechanical tuning of a Seat using dismantled components.