Mercedes W204 W212 Gearbox Oil Cooler Cooling Pipe Hose Line A2045280324

Mercedes W204 W212 Gearbox Oil Cooler Cooling Pipe Hose Line is an original lubrication system component for automatic transmissions, belonging to the Oil coolers and lines category. Designed specifically for W204 series models, the line ensures stable transmission oil flow between the gearbox and the cooler, which translates into safe operating temperatures and predictable automatic transmission performance. This is a practical solution for users who want to restore proper oil circulation in the system without compromising on fitment.

Specifications and technical data

• SKU: A2045280324
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045280324
• Substitutable numbers: A2045280324, A 204 528 03 24
• Gearbox type: Automatic
• Category: Oil Coolers & Lines

Function and role of the gearbox oil line

The gearbox oil line in the Mercedes W204 is responsible for transporting the lubricating and cooling medium between the automatic transmission and the heat exchanger. A properly functioning component:

• stabilizes the operating temperature of the automatic transmission,
• reduces the risk of oil overheating,
• supports the maintenance of proper transmission lubrication parameters,
• indirectly influences gear shift smoothness and component longevity.

Thanks to its factory fitment for the W204 series drivetrain, the line maintains the correct oil routing geometry, which minimizes pressure drops and eliminates the problem of stress caused by the improper installation of universal aftermarket replacements.

Designed for automatic transmission

The element has been constructed with an automatic transmission in mind, which means a properly selected internal diameter, flow characteristics, and line termination method. In practice, this translates into:

• compatibility with factory fittings and connectors in the transmission and oil cooler,
• maintenance of the ATF oil flow designed by the manufacturer,
• reduced risk of leaks at connections due to the correct shape of the ends.

Choosing a line dedicated to an automatic transmission is particularly important in vehicles where the gearbox operates under variable loads and requires stable thermal conditions, typical for Mercedes mid-size units.

Application in the Oil coolers and lines system

As an element of the Oil coolers and lines category, the gearbox oil line in the Mercedes W204 works directly with the oil cooler and other system lines. Replacing this component is recommended in situations where the following occur:

• traces of oil leaks near the line connections,
• mechanical damage or external corrosion,
• suspicion of restricted oil flow in the transmission cooling circuit.

Using an element sourced from the dismantling of an original system allows for maintaining compliance with factory specifications, which is particularly important in vehicles where predictable automatic transmission behavior is essential for long-term operation.

Product characteristics and fitment

The offered line is a Mercedes brand part, which ensures compliance with factory routing geometry and mounting points on the body and drivetrain. This facilitates installation and limits the need for additional modifications, as well as reduces the risk of collision with other components in the engine bay. The product has an assigned OEM part number and interchangeable numbers, allowing it to be precisely verified against the vehicle manufacturer's catalog before purchase.

The used condition means that the element comes from a previously operated vehicle, which in practice allows for economical repair while maintaining original specifications. This is a solution often chosen by users who prefer OEM parts from dismantling over uncertain aftermarket replacements.

Technical support and additional materials

To better understand the impact of the oil cooling system on the durability of the drivetrain and transmission, it is worth reading the guide on the operation of the cooling system and oil coolers, available in the article Engine cooling system – overheating, repair, and used radiators. There, you will find practical information about the consequences of overheating and how components responsible for heat dissipation affect component longevity.

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