Oil Cooler Mercedes C238 Petrol M256 Automatic Gearbox Oil Cooler A7255000100

Oil Cooler Mercedes C238 Petrol M256 Automatic Gearbox Oil Cooler is a specialized drivetrain component designed to work with the petrol engine and automatic transmission. It is responsible for stabilizing the transmission oil temperature, which translates into safe automatic transmission operation and reduced component wear. This is a solution for users who expect a proven component matched to the specifics of Mercedes E-Class Coupé C238 models with the M256 unit.

Specifications and technical data

• SKU: A7255000100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A7255000100
• Substitutable numbers: A7255000100, A 725 500 01 00
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Engine Oil Coolers & Lines

Function and role of the automatic gearbox oil cooler

The automatic gearbox oil cooler in the Mercedes C238 series with the M256 petrol engine operates within the automatic transmission system, keeping the oil in the optimal temperature range. A properly functioning heat exchanger limits the drop in oil viscosity, which has a direct impact on:

• stability of the automatic transmission operation under high loads,
• reducing the risk of overheating during highway driving and in traffic jams,
• extending the service life of clutch discs, valves, and mechatronics,
• maintaining smooth, predictable gear shifts.

For high-power petrol units such as the M256, a properly selected oil cooler is particularly important due to the higher thermal loads on the entire drivetrain.

Compatibility with the drivetrain

The presented cooler has been designed to work with the petrol engine and automatic transmission in the Mercedes C238. This means it is matched to the transmission oil flow characteristics, operating pressures, and thermal conditions typical for this drivetrain configuration.

In practice, this translates into:

• proper integration into the automatic transmission oil circuit,
• maintaining factory cooling logic in conjunction with other system components,
• the possibility of use as a replacement part during maintenance repairs or after a collision.

Product characteristics and application

The automatic gearbox oil cooler from this offer belongs to the Oil coolers and lines group, which means it is a component specialized for operation in oil lubrication and cooling systems. The product comes from dismantling, making it a reasonable choice for servicing vehicles where maintaining the original drivetrain architecture while optimizing costs is important.

A used component of this type is particularly useful in situations where:

• mechanical damage to the cooler has occurred (e.g., after a front-end collision),
• leaks in the transmission oil cooling system have appeared,
• preventive replacement of the component is necessary during a major automatic transmission overhaul.

Benefits of using an original oil cooler

Using an original automatic gearbox oil cooler in a Mercedes C238 with an M256 petrol engine allows for maintaining the factory transmission operating parameters. This is a solution that:

• reduces the risk of improper fitment of connections and hose diameters,
• supports maintaining a stable oil temperature across a wide range of driving conditions,
• helps minimize the risk of failures resulting from automatic transmission overheating.

For workshops specializing in the Mercedes brand and users who care about the technical side of operation, such a component is an important point in planning the long-term reliability of the drivetrain.

Technical support and parts selection

To better understand the impact of the cooling system on the durability of the power unit and transmission, it is worth reading the article describing typical overheating problems and the role of oil coolers in various models, available here: Engine cooling system – overheating, repair, and used coolers.

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