Mercedes ML W164 GL X164 Complete Engine 642820 642.820 39k miles, 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 ML W164 GL X164 Complete Engine 642820 is a complete powertrain from the V6 diesel engine family, designed for use in Mercedes vehicles from the ML W164 and GL X164 series. The moderate mileage and design based on proven diesel technology make this an attractive option for professional engine replacement or comprehensive engine system repairs.

Specifications and technical data

• SKU: A6420103243-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420103243
• Substitutable numbers: A6420103243, A 642 010 32 43
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Engine code: 642820
• Mileage: 39 000

Technical characteristics of the unit

The presented engine belongs to the Engines category and represents a modern diesel construction designed to combine good dynamics with reasonable fuel consumption. The V6 cylinder layout ensures smooth operation, refinement, and an adequate torque reserve, which is particularly important in heavier ML and GL class SUVs.

The engine code allows for precise identification of the unit in service catalogs and when selecting accessories, ECU software, and associated components. This makes it possible to match the engine to a specific vehicle equipment version while maintaining compliance with the manufacturer's factory standards.

Purpose and application in Mercedes vehicles

The engine was developed for use in Mercedes ML W164 and GL X164 SUVs, where stable torque characteristics, proper flexibility, and durability under varied operating conditions are key. The V6 diesel unit works well with both automatic transmissions and advanced all-wheel-drive systems, ensuring smooth acceleration and predictable response to load.

The six-cylinder configuration promotes even distribution of mechanical loads, which in practice translates into stable operation across the entire rev range. This type of engine is often chosen for professional accident repairs, major overhauls, or powertrain upgrades in vehicles used intensively, e.g., in fleets or for towing applications.

Condition, mileage, and benefits of choosing a used engine

The unit is offered as a used complete engine, which in practice means the possibility of significantly shortening repair time compared to a full rebuild of the existing unit. The declared mileage is favorable for this class of engines, which increases the potential for further operation while maintaining proper service procedures and using appropriate consumables.

Choosing a complete, used V6 diesel engine for a Mercedes allows for:

• cost reduction compared to purchasing a brand-new unit,
• maintaining the vehicle's original performance characteristics,
• reducing workshop downtime thanks to a ready-to-install powertrain.

For users and workshops specializing in the Mercedes brand, this is a solution that combines economic aspects with maintaining a high level of vehicle functionality.

Selection by numbers and technical support

The engine has a dedicated OEM part number and interchangeable numbers, which enables precise verification of compatibility with a specific vehicle based on service documentation or the VIN. When selecting the unit, it is worth considering the equipment version, the transmission used, and the drivetrain configuration to maintain full compliance with the factory specification.

If you want to better understand how to safely and consciously choose used engines, selection procedures based on VIN and OEM, and real cost differences compared to new components, check out our expert guide Why it is worth buying used gearboxes and engines – facts instead of myths. It is a practical source of knowledge for both workshops and conscious users.

Mercedes engines – powertrain expansion and modernization

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

In the case of diesel units, the proper operation of the injection system is particularly important, so when installing a used engine, it is worth paying attention to diagnostics and potential regeneration of fuel supply components. Additional information about typical symptoms and consequences of neglect in this area can be found in the article Diesel injector faults – how to recognize them and the risks of neglecting them, which can be a practical supplement to your knowledge when planning a comprehensive service.