Mercedes E CLS Class S211 W211 W219 Ventilation Duct Air Rear Left A2118310345

Mercedes E CLS Class S211 W211 W219 Ventilation Duct Air Rear Left is an original air ventilation system component designed for installation in the rear left section of the cabin. It ensures stable airflow to the passenger area, supporting thermal comfort and the proper operation of the air conditioning system. Thanks to its factory-fit design for the Mercedes body, the duct allows for precise installation without any modifications.

Specifications and technical data

• SKU: A2118310345
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2118310345
• Substitutable numbers: A2118310345, A 2118310345, A 211 831 03 45, AS
• Location on the vehicle: Rear, Left
• Category: Other Air Conditioning & Heating

Purpose and function of the ventilation duct

The presented ventilation duct is a component of the air distribution system in Mercedes E-Class and CLS models, installed in the rear area of the vehicle on the left side. It is responsible for directing the airflow from the main ventilation system to the rear of the cabin, which results in even temperature distribution throughout the interior.

Thanks to its dedicated shape and mounting points matched to the body structure, the duct works seamlessly with factory air vents and other elements of the center console and side panels. This solution reduces the risk of leaks and unwanted airflow noise.

Construction and body fitment

The component has been designed specifically for the interior architecture of the Mercedes, taking into account the layout of the center tunnel, door sills, and upholstery mountings. The duct channels air in the rear zone of the cabin on the left side, maintaining appropriate rigidity and resistance to deformation resulting from bodywork stress and temperature changes.

The factory geometry of the duct allows for:

• proper fitment with adjacent ventilation system components,
• maintaining the airflow cross-section designed by the manufacturer,
• reducing pressure loss in the rear ventilation system.

Such fitment is particularly important in premium class vehicles, where acoustic and thermal comfort has a direct impact on the perceived quality of the journey.

Benefits of using an original ventilation duct

Using an original ventilation duct in the rear left part of the vehicle allows for maintaining the air conditioning and heating system parameters in accordance with the manufacturer's specifications. In practice, this means:

• stable airflow to the rear seats,
• reduced risk of window fogging in the rear of the cabin,
• better cooperation with automatic climate control.

For the user, this translates into higher comfort for rear passengers and a reduced need to adjust ventilation settings while driving. The original component is also beneficial from a service perspective – it facilitates the diagnosis of potential leaks and subsequent maintenance tasks.

Component condition and service application

The offered ventilation duct is a component removed from a vehicle, which allows for an economical repair of the ventilation system while maintaining the factory standard of workmanship. This type of part is suitable both for replacing a damaged duct after a collision or upholstery work, as well as for completing missing elements after previous interior modifications.

Choosing an original duct is particularly important in vehicles where maintaining structural integrity and the proper cooperation of all ventilation system components is a priority, without the need for adapting universal solutions.

Expanding the ventilation system and technical knowledge

If you are planning a comprehensive repair or upgrade of the thermal comfort zone in your Mercedes and need other components from the same group, such as additional air ducts, air hoses, or airflow distribution elements, check out the available parts in the Other Mercedes category.

For a comparison of solutions used in different brands and a better understanding of how manufacturers design drivetrain, braking, and chassis systems in high-performance versions, it is worth reading an article discussing the differences between sports and standard variants – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.