Mercedes C205 OM651 Automatic Transmission Cooler Oil Return Pipe A6511805830

The Mercedes C205 OM651 Gearbox Oil Line is an original part from the Oil Coolers and Lines group, designed for the lubrication system of automatic transmissions in Mercedes vehicles. It ensures stable transmission oil flow, which translates to safe gearbox operation and predictable drivetrain performance in daily use.

Specifications and technical data

• SKU: A6511805830
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511805830
• Substitutable numbers: A6511805830, A 651 180 58 30
• Gearbox type: Automatic
• Category: Oil Coolers & Lines

Purpose and Function of the Oil Line

The gearbox oil line in C205 models with the OM651 engine is responsible for transporting transmission oil between the gearbox and the cooling system components. Proper flow of the working fluid is crucial for maintaining a stable operating temperature of the automatic transmission, reducing wear on internal components, and ensuring smooth gear changes.

This component operates under demanding thermal and pressure conditions, which is why using an original line dedicated to a specific Mercedes drivetrain configuration allows for maintaining the factory operating parameters of the system.

Compatibility with Automatic Transmission

The presented line has been designed to work with an automatic transmission, meaning it has an appropriately selected inner diameter, crimping geometry, and connection ends. Thanks to this:

• it ensures proper transmission oil flow across the entire load range,
• it reduces the risk of pressure drops in the lubrication system,
• it maintains stable transmission operating conditions during city and highway driving.

Dedicated fitment for a specific transmission type minimizes the risk of leaks and installation issues that often arise when using universal parts.

Characteristics of a Part from the Oil Coolers and Lines Category

As part of the Oil Coolers and Lines group, this line works with the transmission oil cooling system, stabilizing the gearbox operating temperature. A properly functioning line:

• supports maintaining the correct oil viscosity,
• indirectly affects the smoothness of the automatic transmission's operation,
• reduces the risk of gearbox overheating under high load conditions.

This technical solution is particularly important in vehicles used in urban traffic, with frequent gear changes and stops, where the oil cooling system works intensively.

Condition of the Part and Installation Aspects

The offered line is a used part, allowing for economical repair of the drivetrain system while maintaining the original manufacturer's specifications. Choosing a salvaged part is a cost-effective solution that also ensures compliance with the vehicle's factory design.

The line is intended for installation in place of the factory part, which facilitates servicing and reduces vehicle downtime. When replacing it, it is recommended to inspect the other components of the oil cooling system to ensure the integrity of the entire installation.

Technical Support and Additional Information

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

To better understand the role of cooling systems in a vehicle and the impact of temperature on component durability, it is worth reading the guide “Summer Heat vs. Cooling System: Used Coolers and Fans Guarantee Savings”, which discusses practical aspects of operating and selecting used cooling components.