Mercedes R171 W203 W204 W209 W211 Engine Oil Filter Cap A2711800238

Mercedes R171 W203 W204 W209 W211 Engine Oil Filter Cap is an original lubrication system component designed for selected Mercedes models, ensuring a tight seal of the oil filter housing and stable engine operation. Thanks to its factory design, the cap guarantees proper oil flow within the system, which translates into safe oil changes and the maintenance of appropriate engine performance parameters. It is a practical solution for users who want to maintain consistency with the vehicle's factory specifications.

Specifications and technical data

• SKU: 8481343
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: 8481343
• Substitutable numbers: A2711800238, A 271 180 02 38
• Part type: Oil Filler Cap
• Category: Oil Drain Plugs, Filler Caps & Dipsticks

Purpose and function of the oil filter cap

The oil filter cap in this version is a component of the lubrication system responsible for the mechanical sealing of the filter cartridge and maintaining the tightness of the housing. In Mercedes vehicles from the R171, W203, W204, W209, and W211 series, it is responsible for:

• stable mounting of the oil filter cartridge in the housing,
• maintaining proper oil pressure in the lubrication channel,
• reducing the risk of leaks at the junction of the housing and the cover,
• facilitating filter replacement during periodic maintenance. By being matched to a specific family of Mercedes engines, the cap works with the factory filter housing, which helps maintain proper lubrication parameters and smooth engine operation.

Design and compatibility with Mercedes models

The cap in question is designed as part of the Oil drain and filler caps and dipsticks group, which means its geometry, thread, and sealing surfaces are adapted to the standard solutions used in selected Mercedes models. The design of the cap allows for:

• secure screwing into the oil filter housing socket,
• compatibility with the appropriate type of seal,
• operation using standard workshop tools. Such a fit reduces the risk of damaging the filter housing or the thread during service and allows for maintaining the factory assembly standard in Mercedes vehicles.

Component condition and service application

The product comes from the used parts segment, which makes it a reasonable choice for maintenance repairs when the priority is to maintain the original design while optimizing costs. This type of oil filter cap will prove useful in situations where:

• the original component has suffered mechanical damage (e.g., stripped thread, crack),
• a leak has occurred in the area of the oil filter housing,
• it is necessary to replace the cap after improper disassembly during previous service. Using an original cap from the same design group allows for maintaining material and dimensional consistency with other components of the lubrication system.

Technical support and related system components

The proper selection of an oil filter cap has a direct impact on engine durability, as leaks in the lubrication system can lead to a drop in oil pressure and accelerated engine wear. It is worth paying attention to the condition of the filter housing, seals, and the quality of the oil used so that the entire system operates under stable conditions. For users interested in a broader context of engine operation and the impact of temperature and lubrication on its service life, the following article may be helpful: Engine cooling system – overheating, repair, and used radiators. If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as oil drain plugs, oil filler caps, or dipsticks, check the available parts in the Mercedes oil drain and filler caps and dipsticks category. To reduce vehicle downtime in the workshop and finish service work related to the lubrication system faster, it is worth learning how a wide selection of components in one place affects repair organization – you can find more on this topic in the material: how a wide range of used parts shortens car downtime at the mechanic.

Summary

Mercedes R171 W203 W204 W209 W211 Engine Oil Filter Cap is a practical solution for users and workshops that want to maintain the original lubrication system design in Mercedes vehicles. A properly selected cap supports the tightness of the filter housing, facilitates service, and helps maintain stable engine operating conditions, which is important both in daily use and in long-term repair planning.