Air Duct Mercedes C118 W177 W247 Rear Ventilation Left N/S A2478310100

Air Duct Mercedes C118 W177 W247 Rear Ventilation Left N/S is an original body ventilation system component, designed for installation in the rear left section of the vehicle. It ensures controlled airflow and proper pressure relief from the cabin, which translates into stable operation of the ventilation system and acoustic comfort. Thanks to its factory design, the air duct maintains the correct flow geometry and fitment for Mercedes C118 / W177 series models.

Specifications and technical data

• SKU: A2478310100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2478310100
• Substitutable numbers: A2478310100, A 247 831 01 00
• Location on the vehicle: Rear, Left
• Category: Other Interior Parts & Accessories

Purpose and function of the component

The presented air ventilation duct operates in the rear left zone of the body, where it is responsible for:

• stabilizing airflow in the cabin ventilation system,
• controlled pressure equalization inside the vehicle,
• reducing air turbulence in the wheel arch and trunk area,
• cooperating with factory seals and body panels.

Due to its fitment for the specific Mercedes platform, the component maintains proper rigidity, and its shape minimizes unwanted airflow noise while driving.

Construction and fitment for Mercedes C118 / W177

The duct has been designed as part of the body ventilation system, taking into account the geometry of the rear bodywork. Properly formed air guides and contact surfaces with the sheet metal and upholstery allow for:

• precise seating in the rear left part of the vehicle,
• cooperation with factory mounts and seals,
• maintaining the tightness of the ventilation system in the trunk area.

The original Mercedes origin means maintaining dimensional compliance with the factory design, which facilitates installation and reduces the risk of improper fitment with the bodywork.

Performance characteristics and installation

The element from the Other category plays an important auxiliary role in the ventilation system, affecting the comfort of daily vehicle operation. As a used part, the air ventilation duct:

• retains the functionality intended by the vehicle manufacturer,
• allows for an economical replacement of a damaged or leaking component,
• is intended for installation in the place of the factory duct, without the need for structural modifications.

Its location in the rear left part of the vehicle facilitates easier diagnostics in case of airflow problems or the appearance of unwanted noises in the trunk area.

Application in service and body repairs

In service practice, the air ventilation duct is replaced, among other things, after bodywork repairs of the rear section, interventions in the wheel arch zone, or when leaks in the ventilation system are detected. Replacing it with an original component from the Mercedes range allows you to:

• restore factory airflow conditions,
• reduce the risk of window fogging resulting from improper circulation,
• maintain compliance with the vehicle's technical documentation.

For workshops specializing in the Mercedes brand, using an original air duct is beneficial both in terms of quality and installation time.

If you are planning a comprehensive repair or upgrade of the rear body zone in your Mercedes and need other components from the same group, such as ventilation ducts, covers, or additional trim elements, check the available parts in the Other Mercedes category.

Technical support and knowledge about sports systems

For users interested in comparing technical solutions used in different brands and equipment versions, including high-performance models, comparative material regarding engine, brake, and chassis construction may be helpful. In this context, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how manufacturers differentiate components depending on the vehicle's purpose.