Mercedes C CLK W203 C209 Cabin Pollen Air Filter Box Housing Cover A2038300440

Mercedes C CLK W203 C209 Cabin Pollen Air Filter Box Housing Cover is an original ventilation system component designed for C-Class and CLK-Class models, ensuring a stable fit for the pollen filter element. The robust construction of the housing supports proper airflow through the filter, which translates into efficient operation of the ventilation and air conditioning system. This is a practical solution for users who want to restore the factory functionality of the air filtration system in their Mercedes.

Specifications and technical data

• SKU: A2038300440
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2038300440
• Substitutable numbers: A2038300440, A 203 830 04 40, A2038170921, A 203 817 09 21
• Category: Pollen Filters

Function and role of the cabin air filter housing

The cabin air filter housing in a Mercedes is responsible for the tight and stable mounting of the filter element in the air intake duct. A properly selected housing:

• maintains the filter in the correct position relative to the air ducts,
• limits air leaks outside the filter medium,
• supports even airflow into the vehicle interior,
• prevents vibrations and looseness of the filter element during ventilation operation.

Thanks to this, the ventilation and air conditioning system can effectively utilize the properties of the pollen filter, and the driver and passengers benefit from stable air quality parameters in the cabin.

Designed for Mercedes W203 and C209 models

The presented housing has been designed with the body architecture and ventilation system of the W203 generation C-Class and the C209 CLK-Class coupe in mind. This means it is perfectly matched to the factory mounting points and the geometry of the air ducts, which facilitates installation and allows for maintaining the original airflow characteristics. Using a component from the same design family minimizes the risk of leaks and problems with filter seating.

Benefits of using an original housing

Choosing an original cabin air filter housing for a Mercedes translates into a number of practical advantages in daily operation:

• Compatibility with the ventilation system – the housing is adapted to the factory shape of the air ducts and the cowl panel construction.
• Constant support for the filter element – reduces the risk of filter deformation and leaks around its perimeter.
• Stable operating conditions for the pollen filter – promotes the maintenance of appropriate filtration efficiency for pollutants from the outside air.
• Possibility of multiple filter element replacements – the housing serves as a base in which new cabin filters are periodically installed.

For users who regularly service the ventilation system, using the appropriate housing is an essential element of maintaining repeatable filtration parameters over a long period of operation.

Category characteristics and service application

The element belongs to the Cabin, pollen filters group, i.e., components responsible for cleaning the air supplied to the vehicle interior. In workshop practice, the cabin air filter housing is often replaced during:

• repairs in the cowl panel and air intake chamber area,
• mechanical damage to the housing (cracks, broken clips),
• problems with the correct seating of the filter element.

Selecting the right housing is crucial when you want to restore proper airflow through the filter and avoid phenomena such as flow noise or local leaks in the ventilation system.

Product condition and practical application

The housing is offered in a used condition, which allows for an economical restoration of the air filtration system's efficiency in the vehicle. This type of component is particularly useful in situations where the existing housing has been damaged and it is necessary to maintain the factory mounting geometry. Combined with a new cabin filter element, you can restore the proper operating conditions of the ventilation system without interfering with the vehicle's construction.

If you are planning a comprehensive repair or upgrade of the ventilation and air conditioning zone in your Mercedes and need other elements from the same group, such as filter elements, housing seals, or additional mounting hardware, check the available parts in the Mercedes Cabin, pollen filters category.

For drivers interested in the safe selection of used vehicle system components, including elements operating in demanding conditions, a guide describing verification procedures and selection criteria may be helpful – you can find more practical tips in the article "Second-hand braking system: how to safely choose discs, calipers, and ABS?", which shows how to consciously approach the purchase of used parts in a specialized store.