Mercedes W221 OM642 Heat Exchanger Diesel A2218302000

The Mercedes W221 OM642 Heat Exchanger Diesel is an original heat exchanger designed for diesel engines, specifically for the W221 series. Its factory-designed construction ensures stable heat dissipation from the system, leading to predictable engine and component operation and reducing the risk of overheating during daily use.

Specifications and technical data

• SKU: RHD-A2218302061
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218302061
• Substitutable numbers: A2218302061, A 221 830 20 61, A2218302000, A 221 830 20 00
• Fuel type: Diesel
• Part type: Heater Core
• Category: Heater Cores

Purpose and Role in the System

The presented heat exchanger is a component of the thermal system in Mercedes diesel vehicles, responsible for efficient heat energy exchange between cooperating media. A properly functioning component of this type stabilizes the operating temperature of sub-assemblies, which is crucial for both the durability of the powertrain and maintaining performance parameters in the long term.

Being dedicated to a specific body series and diesel engine type minimizes the risk of fitting issues and allows for the preservation of the factory operating characteristics of the cooling system and associated circuits.

Construction and Technical Fit

As a component from the Heat Exchangers group, this product is designed to work with systems used in the Mercedes W221 diesel engine. The appropriate placement of connectors and mounting points allows for installation in place of the original component without requiring modifications to the vehicle's structure.

Its original Mercedes origin promotes compatibility with factory hoses, seals, and associated elements, simplifying servicing and reducing vehicle downtime. The exchanger has an assigned OEM part number and related replacement numbers, facilitating compatibility verification by catalog identifiers.

Operating Characteristics in Diesel Engines

Diesel engines generate significant thermal loads, making a properly selected heat exchanger directly impact the maintenance of stable operating temperatures. Efficient heat exchange promotes smooth engine operation, helps reduce localized overheating, and supports the preservation of lubrication and sealing parameters over a long period of use.

Using a component matched to the specific fuel type and engine design avoids irregularities in the coolant or oil circuits and reduces the risk of leaks resulting from the use of unsuitable replacements.

Condition, Verification, and Service Application

The offered heat exchanger is a used part, making it an attractive solution when cost optimization for repairs is a priority while maintaining original construction. Such components are frequently used in professional workshops specializing in the Mercedes brand, particularly for fleet vehicle repairs and intensively used cars.

Thanks to the presence of the OEM part number and replacement numbers, precise identification of compatibility with a specific vehicle configuration is possible, minimizing the risk of selecting the wrong part and speeding up the service process.

Support for Selection and Additional Materials

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as additional radiators, heat exchange modules, or related hoses, check the available parts in the Mercedes Heat Exchangers category.

If you are interested in broader use of used components in electronic and control systems, practical tips on selecting by OEM numbers, verifying compatibility, and installation can be found in the guide article on choosing used ECUs and sensors, which helps streamline the service process and reduce the risk of errors when purchasing second-hand parts.