Mercedes W166 ML 350 Complete Engine 642826 642.826 4Matic 258HP 79k, 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 W166 ML 350 Complete Engine 642826 4Matic 258HP is a complete powertrain unit from the V6 diesel family, designed for W166 ML-Class models with 4Matic all-wheel drive. A used engine from this series is a solution for users looking for a proven design that maintains factory performance parameters and enables cost-effective vehicle repair. Thanks to the completeness of the unit, it is possible to efficiently swap the powertrain without the need to source many additional components.

Specifications and technical data

• SKU: A6420107107-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420107107
• Substitutable numbers: A6420107107, A 642 010 71 07, A6420101908, A 642 010 19 08, A6420107707, A 642 010 77 07
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Engine code: 642826
• Mileage: 79 000

Technical characteristics of the powertrain

The presented engine belongs to the Engines category and is intended for Mercedes vehicles from the W166 ML 350 series with 4Matic drive. The V6 cylinder design ensures smooth operation and an adequate torque reserve, which translates into smooth acceleration for this heavy SUV. The use of diesel fuel supply allows for favorable fuel consumption while maintaining high rated power.

The engine code assigned to this unit enables precise identification when selecting accessories and control software. This allows the mechanic to easily verify compatibility with a specific vehicle equipment version, transmission, and 4Matic drivetrain. The unit is ready for installation in place of the factory engine, maintaining the original engine bay architecture.

Purpose and application in Mercedes W166 ML 350 4Matic

The engine was designed for use in mid-to-high-end SUVs, where stable torque characteristics across a wide rev range are essential. Combined with the 4Matic drive, the unit performs well both in highway driving and in low-grip conditions, providing predictable throttle response and appropriate dynamics.

Power output at the level of 258 HP (according to factory data for this version) allows for safe overtaking and comfortable driving under full load. The engine is adapted to work with automatic transmissions used in the ML 350, which facilitates integration with existing vehicle electronics and driver assistance systems.

Benefits of installing a complete used engine

Choosing a complete, used engine for the Mercedes ML 350 allows for significant repair cost savings compared to rebuilding or purchasing a brand-new unit. A complete powertrain reduces workshop labor time, as many auxiliary components are already integrated with the block, minimizing the need to transfer parts from the damaged engine.

The V6 diesel engine in this configuration is valued for its good performance-to-fuel-consumption ratio and structural durability. The moderate mileage of the unit favors further operation provided that proper service intervals are maintained and the correct consumables are used. For workshops, this means a predictable installation process, and for the user – the ability to restore full vehicle functionality within a controlled budget.

Selection by numbers and technical support

The engine has an assigned OEM part number and a set of interchangeable numbers, which facilitates verification of compatibility with a specific vehicle version. When selecting, it is recommended to use VIN-based identification and compare the engine code to avoid discrepancies regarding accessories, the ECU, or the exhaust system. This approach minimizes the risk of additional costs and speeds up the installation process.

For users and workshops who want to deepen their knowledge about the cost-effectiveness of installing used powertrains, the following expert guide will be useful: Why it is worth buying used transmissions and engines – facts instead of myths. The article discusses, among other things, VIN/OEM selection procedures, common myths about used components, and example cost ratios compared to new parts.

Expanding the scope of work in the powertrain area

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional powertrains, engine blocks, or complete units with accessories, check the available parts in the Mercedes Engines category.

Summary

Mercedes W166 ML 350 Complete Engine 642826 4Matic 258HP is a proposal for drivers and workshops that want to restore full powertrain efficiency while maintaining the factory operating characteristics of the V6 diesel unit. A used, complete engine dedicated to the ML 350 4Matic is a technically coherent solution, allowing for effective repair without compromising compatibility with the vehicle.