Mercedes W168 OM668 Diesel Oil Separator Breather A6680100062

Mercedes W168 OM668 Diesel Oil Separator Breather is a specialized component of the crankcase ventilation system for diesel engines, designed for OM668 units used in the A-Class W168 model. A properly selected oil separator breather stabilizes pressure in the diesel engine, reduces blow-by, and helps maintain the correct operation of the lubrication system. This component from the Oil filters category allows for technically correct maintenance of the oil and gas circulation in the engine, which translates into smoother engine operation.

Specifications and technical data

• SKU: A6680100062
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6680100062
• Substitutable numbers: A6680100062, A 668 010 00 62, 0928400503, 0 928 400 503
• Fuel type: Diesel
• Category: Oil Filters

Function and role of the oil separator breather in the OM668 engine

The oil separator breather in the OM668 diesel engine is responsible for the controlled discharge of gases from the crankcase and the separation of oil particles from these gases. A properly functioning component:

• stabilizes pressure inside the engine unit,
• reduces blow-by and excessive exhaust smoke,
• supports the maintenance of proper oil circulation in the engine,
• reduces the risk of leaks and oil suction into the intake system.

For Diesel engines, a properly selected oil separator breather has operational significance – it affects engine smoothness, oil consumption, and the cleanliness of the intake system.

Purpose and compatibility

The presented oil separator breather is dedicated to OM668 units mounted in the Mercedes A-Class W168 generation. Using a component that is structurally consistent with the manufacturer's original solution allows for maintaining the factory parameters of the ventilation system. This is particularly important in diesel engines, where thermal and pressure loads are higher than in gasoline units.

Thanks to the preservation of the original geometry and gas routing, the breather works with the factory intake and lubrication system without the need to modify other components.

Condition of the component and benefits of using a used part

The offered oil separator breather is an aftermarket part, which allows for economical repair of the ventilation system while maintaining a design consistent with the factory solution. For this type of component, a used part can be a rational choice, especially when you want to match a specific engine version and reduce service costs.

Using a functional component from the Oil filters category helps restore proper engine operating conditions, reduce blow-by, and stabilize oil consumption, which is especially important in high-mileage diesel units.

Significance for engine durability

A functional oil separator breather in a Mercedes W168 with an OM668 engine affects:

• maintaining proper pressure in the crankcase,
• reducing the risk of leaks at shaft seals and valve covers,
• limiting intake contamination with oil mist,
• more stable operation of the diesel engine across the full load range.

To better understand how components related to oil circulation and temperature affect engine longevity, it is worth reading the guide on our blog: Engine cooling system – overheating, repair, and used radiators. The article shows the relationships between operating temperature, lubrication, and engine durability.

Expanding oil system maintenance in your Mercedes

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 filter inserts, housings, or additional oil separation components, check the available parts in the Mercedes oil filters category.

Summary

Mercedes W168 OM668 Diesel Oil Separator Breather is a technically matched component of the crankcase ventilation system in a diesel engine that helps maintain stable internal pressure and reduce unwanted blow-by. Choosing the right oil separator breather is essential for maintaining the correct operation of the lubrication system, intake cleanliness, and the overall durability of the engine in your Mercedes A-Class W168.