Mercedes W204 W211 W213 OM642 Oil Filler Neck Seal is an original part from the Oil Drain & Filler Plugs and Dipsticks category, designed for OM642 engines in select Mercedes models. The precisely manufactured neck with a seal ensures a leak-proof oil filler connection, supporting stable engine lubrication and reducing the risk of leaks. A used OEM component is a sensible choice for those who want to maintain the factory design of the oil system at a controlled service cost.
Specifications and technical data
- SKU: A6420180180
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A6420180180
- Substitutable numbers: A6420180180, A 642 018 01 80
- Category: Oil Drain Plugs, Filler Caps & Dipsticks
Purpose and Function in the Oil System
The oil filler neck with seal in the OM642 engine is responsible for a tight and stable connection of the filler elements to the engine cover. A correctly selected component:
- limits oil evaporation and leaks around the filler neck,
- helps maintain engine bay cleanliness,
- supports proper ventilation around the filler cap,
- maintains the original oil flow during top-ups and servicing.
By using the original design solution, compatibility with the OM642 engine's accessories used in Mercedes C-Class, E-Class, and other variants with this engine type is maintained.
Benefits of Using an Original Neck with Seal
Using the factory oil filler neck in the OM642 engine offers a number of practical operational benefits:
- Stable Connection Seal – fit to the engine cover and filler cap in accordance with the manufacturer's design.
- Reduced Contamination – lower risk of oil splashing around the filler neck during top-ups.
- Lubrication System Consistency – maintaining the original geometry of the component, which facilitates servicing.
- Hassle-Free Installation – no need for modifications or fitting aftermarket alternatives.
This solution is particularly recommended for service work in the valve cover area, seal replacement, or after accessory removal on OM642 engines.
Product Characteristics and Condition
The offered neck with seal comes from the original Mercedes production line, meaning factory dimensional and material tolerances are maintained. The part is used, making it an economical alternative to new parts while maintaining compatibility with the OM642 engine design.
Before reinstallation, a standard inspection of the sealing surfaces and proper cleaning of the engine cover seat are recommended. Correct installation and tightening according to the service procedure allow for full utilization of this component's potential.
Application in Mercedes Models with OM642 Engine
Mercedes W204 W211 W213 OM642 Oil Filler Neck Seal is used in popular Mercedes C-Class and E-Class models equipped with the OM642 engine. Choosing an original component is particularly important in intensively used vehicles where the lubrication system operates at elevated temperatures and under heavy load.
When planning engine maintenance, it is advisable to also check the condition of other oil system components, such as hoses, the oil cooler, or valve cover seals. Proper inspection of these parts helps reduce the risk of leaks and engine overheating. More about the impact of the cooling and oil system on engine durability can be found in the article: Engine Cooling System – Overheating, Repair, and Used Coolers.
Other Mercedes Oil Drain & Filler Plugs and Dipsticks
If you are looking for other parts from the Oil Drain & Filler Plugs and Dipsticks category for this brand's vehicles, check out the Mercedes Oil Drain & Filler Plugs and Dipsticks available in our store to select a component tailored to your specific model and engine version.
