Mercedes CLK W203 W211 C209 W169 W245 Oil Filler Cap A0000100385

Mercedes CLK W203 W211 C209 W169 W245 Oil Filler Cap is an original component from the Fuel filler flaps and caps group, designed for use in selected Mercedes models. It is a practical solution for users who need a proven oil filler cap from a reliable source, structurally matched to the factory engine system.

Specifications and technical data

• SKU: A0000100385
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0000100385
• Substitutable numbers: A0000100385, A 000 010 03 85
• Location on the vehicle: Front, Left
• Category: Fuel Tank Caps

Purpose and function of the oil filler cap

The oil filler cap in Mercedes CLK series models and related vehicles is responsible for tightly sealing the engine oil filler opening, which reduces the risk of leaks and prevents contaminants from entering the lubrication system. This component is designed as part of the engine accessory system, taking into account the appropriate geometry, sealing material, and ergonomics for regular oil changes.

The presented cap is compatible with engines installed in selected Mercedes bodies, and its design is intended for operation in the front, left part of the engine compartment, in accordance with the factory placement in a given model. This allows the user to maintain the original maintenance logic and easy access during inspections.

Construction and fitment to the engine system

As an element from the Fuel filler flaps and caps group, the oil filler cap is made of materials selected for temperature resistance, contact with engine oil, and typical operational loads. The applied thread geometry and sealing surface are consistent with the factory socket in the valve cover or other designated oil filler point in a given engine.

Proper dimensional and shape fitment translates into:

• stable seating in the oil filler socket,
• maintaining the tightness of the lubrication system in the cap area,
• easy manual operation during unscrewing and tightening.

By maintaining the factory design, the user avoids problems with mismatched replacements that have a different thread profile or diameter, which is important for both operational safety and service comfort.

Characteristics of the used component

The offered oil filler cap is a used component, sourced from a dismantled Mercedes vehicle. Such components are often chosen by users who are looking for original solutions within a reasonable budget, while maintaining compliance with factory specifications. A used cap allows for an economical replacement of a damaged or missing part without the need to resort to unreliable replacements.

In practice, this means the ability to restore proper oil filler operation and maintain consistency with other engine accessory components. This is particularly important in vehicles where maintaining the original configuration of sub-assemblies is a priority.

Application in Mercedes vehicles

The oil filler cap is dedicated to selected Mercedes models from the CLK family and other body series indicated in the product title. This allows the user to select a component consistent with the specific generation of the vehicle, which facilitates maintaining technical and visual consistency of the engine compartment.

Proper fitment of the cap to a given vehicle model is crucial for maintaining the tightness of the lubrication system and ease of use during oil changes. In case of doubt, it is worth verifying compatibility by part number or vehicle data to avoid installation problems.

Technical support, selection, and additional materials

If you are planning a comprehensive repair or upgrade of the fuel and filler system area in your Mercedes and need other elements from the same group, such as caps, flaps, or closure elements, check the available parts in the Mercedes fuel filler flaps and caps category.

To better understand the relationships between fuel system components, how to select components by factory numbers, and the impact of tightness on vehicle operation, it is worth checking out our guide: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. You will find practical tips regarding diagnostics, part selection, and operation of the entire system.

Summary

Mercedes CLK W203 W211 C209 W169 W245 Oil Filler Cap is a practical solution for users who want to restore full functionality of the oil filler in their vehicle while maintaining the original design. A used, original component from the Fuel filler flaps and caps group allows for an economical, yet technically correct replacement of a damaged cap, supporting safe and predictable operation of the engine unit.