Mercedes W212 C218 OM651 Gearbox Oil Pipe Line Hose Automatic A6511803030

Mercedes W212 C218 OM651 Gearbox Oil Pipe Line Hose Automatic is a specialized drivetrain component designed for diesel engines. It is responsible for the stable flow of transmission oil between the automatic gearbox and the cooling system, which directly impacts the performance and durability of the transmission. Using an original pre-owned part is a sensible choice for professional repairs or when replacing a damaged hose in Mercedes vehicles equipped with the OM651 unit.

Specifications and technical data

• SKU: A6511803030
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511803030
• Substitutable numbers: A6511803030, A 651 180 30 30
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Oil Coolers & Lines

Purpose and function in the drivetrain

This oil hose operates within the automatic transmission oil circuit in diesel-powered vehicles, ensuring the correct pressure and flow of the working medium. A properly functioning hose:

• maintains the tightness of the transmission oil system,
• ensures stable transmission cooling by working in conjunction with the oil cooler,
• reduces the risk of automatic transmission overheating during city and highway driving,
• supports smooth transmission operation during gear shifts.

As a result, the automatic transmission maintains predictable performance, and gear changes remain smooth and consistent under typical operating conditions.

Benefits of using an original oil hose

The original automatic transmission oil hose for Mercedes diesel engines is designed for the specific operating pressures and temperatures found in this system. In practice, this means:

• precise fitment to factory mounts and connectors,
• maintenance of the correct oil flow diameter,
• appropriate resistance to temperature and engine vibrations,
• consistency with the operating parameters of the oil cooling system.

Choosing such a component is particularly important in cars with an automatic transmission, where the quality of the transmission oil circulation affects the lifespan of the entire assembly.

Component condition and service application

The offered hose belongs to the Oil coolers and hoses category, meaning it is designed for use in oil systems, including the transmission oil cooling circuit. A used part of this type works well as a service component for:

• replacing a leaking or mechanically damaged hose,
• repairs following a collision in the front-end area,
• servicing the transmission oil cooling system in Mercedes diesel vehicles.

Before installation, it is recommended to perform a standard check of the seals and connector condition, as well as to change the transmission oil according to the vehicle manufacturer's service procedure.

Technical support and additional information

In systems where the oil hose works with an oil cooler, it is crucial to understand the impact of temperature on the durability of the engine and transmission. You can find more about the role of cooling in protecting the engine and accessories in the article: Engine cooling system – overheating, repair, and used radiators.

If you are planning a comprehensive repair or upgrade of the oil system and transmission cooling area in your Mercedes and need other components from the same group, such as oil hoses, oil coolers, or additional connectors, check the available parts in the Mercedes oil coolers and hoses category.

Summary

Mercedes W212 C218 OM651 Gearbox Oil Pipe Line Hose Automatic is a functional drivetrain component that supports proper cooling and lubrication of the transmission. Using an original, pre-owned hose allows for a technically correct repair, preservation of factory oil flow parameters, and maintenance of stable automatic transmission operation in daily use.