Oil Filler Cap Mercedes W202 W203 W204 W906 Engine Oil Cover A1110180302

Oil Filler Cap Mercedes W202 W203 W204 W906 Engine Oil Cover is an original component from the Oil drain and filler caps and dipsticks group, designed for use in popular models of this brand. This used cap ensures a factory-fit to the valve cover and thread, which translates into the tightness of the lubrication system and trouble-free maintenance. It is a practical solution for users who want to maintain compliance with factory specifications without incurring the costs of new parts.

Specifications and technical data

• SKU: A1110180302
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1110180302
• Substitutable numbers: A1110180302, A 111 018 03 02, BG
• Category: Oil Drain Plugs, Filler Caps & Dipsticks

Purpose and technical function

The presented oil filler cap has been designed specifically for power units used in Mercedes C-Class models of the W202, W203, W204 generations, as well as the Vito/Wiano W639 model. Its task is to tightly close the engine oil filler opening to limit evaporation, contamination, and the risk of leakage during engine operation.

A properly selected cap in this application:

• maintains the correct sealing of the valve cover,
• prevents contaminants from entering the lubrication system,
• facilitates regular inspection and oil refilling,
• maintains compliance with the factory engine design.

Construction and fitment to the power unit

The oil filler cap in this version is a component structurally matched to the socket in the valve cover used in Mercedes engines from the mentioned body series. The applied sealing profile and the shape of the working part ensure proper adhesion to the socket surface, which limits the risk of leaks even during long-term operation.

Thanks to maintaining the original geometry of the thread and handle, the cap:

• allows for a secure grip when unscrewing and tightening,
• is compatible with the factory valve cover,
• does not require any modifications or adaptations.

Benefits of using an original oil filler cap

Choosing a used, original oil filler cap for a Mercedes is a reasonable solution for drivers who want to maintain the factory parameters of the lubrication system at optimal costs. The element from this group has a direct impact on:

• engine operation safety – reducing the risk of oil loss through a leaky filler,
• engine bay cleanliness – no oil splashing around the valve cover,
• maintenance comfort – easy access to the filler and repeatable tightening.

By using an original cap, you maintain consistency with the factory service documentation and minimize the risk of problems resulting from the use of replacements with uncertain fitment.

Condition, verification, and practical application

The offered element comes from dismantling and is classified as used, which allows for an economical repair or replacement of a missing oil filler cap in your Mercedes. Before being put back on sale, this type of component is standardly verified for mechanical integrity, the condition of the thread, and the working part responsible for sealing.

A cap prepared in this way will work well both during routine maintenance and when replacing the valve cover, engine overhauls, or completing missing elements after previous repairs. It is a practical choice for users who value compliance with the factory design and predictable part behavior during operation.

System expansion and selection of related elements

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional oil drain plugs, filler elements, or dipsticks, check the available parts in the Mercedes oil drain and filler caps and dipsticks category.

To better understand the impact of proper lubrication and operating temperature on the durability of the power unit, it is worth reading the guide on the cooling system and engine operation: Engine cooling system – overheating, repair, and used radiators. This will make it easier for you to assess how to take care of the engine so that the oil filler cap and other lubrication and cooling system elements work together in stable operating conditions.