Mercedes W221 S 320 350 CDI Complete Engine 642930 642.930 OM642 WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The warranty covers the engine itself; engine accessories are covered by a 30-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a complete engine.

The engine comes from a right-hand drive (RHD) vehicle. The wiring harness is not compatible with left-hand drive (LHD) vehicles and requires replacement or modification.

Mercedes W221 S 320 350 CDI Complete Engine 642930 642.930 OM642 WARRANTY is a complete powertrain unit from the V6 diesel family, designed for the brand's luxury class models. Thanks to its preserved factory configuration and professional dismantling, it serves as a solid base for engine replacement in Mercedes vehicles, ensuring stable operation of the drivetrain and predictable performance parameters. This is a solution for users looking for a proven, used engine with a clear history.

Specifications and technical data

• SKU: A6420107502-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420107502
• Substitutable numbers: A6420107502, A 642 010 75 02
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Engine code: 642930
• Mileage: 59 000

Technical characteristics of the unit

The presented engine belongs to the Engines category and represents a modern diesel construction used in Mercedes luxury class vehicles. The six-cylinder layout ensures smooth operation, good flexibility across the entire rev range, and favorable conditions for compatibility with both automatic and manual transmissions. The unit code allows for precise version identification, which facilitates selection for a specific vehicle configuration.

The engine was sourced from a car with documented mileage, which allows for a more predictable assessment of its wear compared to anonymous units. This type of configuration is frequently chosen for post-accident repairs, overhauls, and when replacing worn-out engines in heavily used vehicles.

Application and selection for Mercedes W221

Mercedes W221 S 320 350 CDI Complete Engine 642930 642.930 OM642 WARRANTY is intended for installation in vehicles of this generation that were factory-equipped with a V6 diesel engine. By maintaining the completeness of the accessories (within the configuration intended for this unit), it is possible to limit additional adaptation work, and the installation itself proceeds in an orderly manner, in accordance with the manufacturer's service procedures.

When selecting this unit, it is recommended to verify compatibility using the VIN and compare parameters with the currently installed engine, which minimizes the risk of incompatibility. A properly selected engine allows for maintaining factory performance characteristics, including idle smoothness, throttle response, and expected fuel consumption.

Benefits of choosing a used V6 diesel engine

Choosing a used V6 diesel engine for a Mercedes is a solution that significantly reduces repair costs compared to purchasing a brand-new unit or performing a full overhaul of an old engine. Units from this series are valued for their durability, high efficiency during highway driving, and a favorable power-to-fuel consumption ratio. Additionally, the complete configuration facilitates the transfer of accessories and connection of the engine bay wiring.

To better understand the specifics of purchasing used power units and the procedures for selection by VIN and catalog numbers, it is worth reading the expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses the most important technical and economic aspects of such an investment.

Professional selection and minimization of purchase risk

When purchasing a used engine, it is crucial to pay attention to compliance with manufacturer markings, fuel type, and cylinder configuration. Proper identification using catalog numbers and vehicle data helps avoid problems with installation, ECU software, or accessories. If necessary, you can use additional tips on selecting used components, described in more detail in the guide how to professionally select used car parts, saving time and nerves.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as blocks, cylinder heads, or complete power units, check the available parts in the Mercedes Engines category.