Mercedes W639 Oil Filler Filling Hose Cap Cover A6460160229

Mercedes W639 Oil Filler Filling Hose Cap Cover is an original component from the Oil drain and filler caps and dipsticks group, designed for the lubrication system in Mercedes vehicles. It ensures a tight seal for the oil filler, stabilizing engine operating conditions and reducing the risk of leaks and contamination in the engine compartment.

Specifications and technical data

• SKU: A6460160229-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6460160229
• Substitutable numbers: A6460160229, A 646 016 02 29, KD
• Category: Oil Drain Plugs, Filler Caps & Dipsticks

Purpose and technical function

The oil filler cap is responsible for the controlled, secure closure of the filler opening in the engine cover. In practice, this means:

• maintaining the correct pressure in the lubrication system,
• protection against the ingress of external contaminants,
• limiting evaporation and leakage of engine oil,
• stable operation of the power unit in daily use.

Selecting the correct cap for a specific vehicle series is crucial for maintaining proper sealing and compatibility with the valve cover and the socket thread.

Benefits of using an original Mercedes cap

Using a cap dedicated to the W639 series allows for maintaining the factory parameters of the lubrication system. The original design ensures:

• secure seating in the socket without play or excessive pressure,
• proper seal performance within typical engine temperature ranges,
• adequate resistance to engine oil and operational additives,
• consistency with other lubrication system components in the given model.

As a result, the oil filler cap can be used both as a replacement part during standard service maintenance and for repairs following leaks or mechanical damage.

Condition and service application

The offered cap comes from a Mercedes vehicle and is a secondary market component. This type of part is suitable for situations where the existing cap has suffered mechanical damage, has a worn seal, or was lost during service maintenance. Replacing the cap is a simple workshop task, and a correctly selected element allows for the quick restoration of system tightness.

Due to its design, which complies with factory solutions, the cap can be used in vehicles operated intensively – both in private and fleet applications, where repeatability of parameters and predictable behavior over a long period of use are important.

Related lubrication and cooling system components

When working on the lubrication system and engine operating temperature, it is worth paying attention to the general condition of the engine, including tightness and proper cooling. Extended information on the impact of temperature on engine lifespan and the role of the oil cooler can be found in the article: Engine cooling system – overheating, repair, and used radiators.

Category and selection of other components

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, filler caps, or dipsticks, check the available parts in the category Mercedes oil drain and filler caps and dipsticks.

Summary

Mercedes W639 Oil Filler Filling Hose Cap Cover is a practical solution for users and workshops that want to restore the proper tightness of the lubrication system in Mercedes vehicles. A properly selected cap minimizes the risk of leaks, supports stable engine operation, and constitutes an important element of preventive maintenance in daily vehicle use.