Heat Exchanger Mercedes W204 W212 Oil Cooler Transmission Radiator A6511800665

Mercedes W212 Transmission Oil Cooler is an original part from the Oil Coolers and Hoses group, designed for the drivetrain system in Mercedes E-Class W212 models. A used OEM part ensures factory fit, stable transmission oil cooling performance, and predictable behavior of the entire drivetrain.

Specifications and technical data

• SKU: A6511800665
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511800665
• Substitutable numbers: A6511800665, A 651 180 06 65
• Category: Engine Oil Coolers & Lines

Function and Application of the Mercedes W212 Transmission Oil Cooler

The transmission oil cooler is responsible for dissipating heat from the oil circulating in the automatic transmission, which reduces the risk of overheating and lubricant degradation. Stable oil temperature translates to:

• more predictable automatic transmission operation,
• reduced wear of friction components,
• maintenance of proper hydraulic system pressure,
• extended transmission lifespan during intensive use.

Thanks to its OEM design, the cooler integrates seamlessly with the factory oil lines and mounting points in the Mercedes W212, eliminating the need for modifications or fitting universal aftermarket parts.

Benefits of Using an Original Transmission Oil Cooler

Choosing an original transmission oil cooler for Mercedes allows you to maintain the performance parameters intended by the vehicle manufacturer. In practice, this means:

• secure fit with factory brackets and hoses,
• correct oil flow and efficient heat dissipation,
• no compatibility issues with sensors or connection ports,
• reduced risk of leaks resulting from imprecise fitting.

A used OEM part offers a sensible compromise between repair cost and maintaining high quality and compliance with the drivetrain's factory specifications.

Condition, Verification, and Part Selection

The offered transmission oil cooler for Mercedes W212 is a used part obtained from disassembly. Such components are routinely verified for leaks, the condition of connection ports, and overall suitability for further use before being offered for sale. This ensures that the customer receives a part ready for installation, without the need for additional modifications.

When selecting a transmission oil cooler, it is crucial to compare OEM markings and interchangeable part numbers with your vehicle's data. All this information is available in the technical specifications section, making it easier to match the part to your specific Mercedes W212 engine and transmission variant.

Technical Support and Additional Information

A properly functioning transmission oil cooling system is closely linked to the overall condition of the vehicle's cooling system. To better understand the relationships between the oil cooler, the main coolant radiator, and the risk of engine overheating, it is recommended to read the guide: Engine Cooling System – Overheating, Repair, and Used Coolers.

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Mercedes and require other parts from the same group, such as additional oil coolers, oil lines, or connection components, check the available parts in the Mercedes Oil Coolers and Hoses category.

For drivers who want to make informed choices about parts for their car and understand the difference between aftermarket and OEM components, the article explaining the significance of original parts will be helpful: OEM Quality and Safety Guarantee – Why Used Original Car Parts Are the Best Choice for Your Car?.