Engine 642850 Mercedes W212 E 350 CDI Bare Engine 642.850 OM642 WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

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

Listing details

The offer applies to a bare engine.

The engine is sold without accessories (e.g. alternator, starter motor, manifolds, injectors, turbocharger, etc.).

Engine 642850 Mercedes W212 E 350 CDI Bare Engine 642.850 OM642 WARRANTY is a proven diesel unit from the V6 family, designed for E-Class models. It is an ideal choice for users looking for a technically advanced diesel engine with high refinement, as well as for workshops performing professional drivetrain repairs on Mercedes vehicles. By maintaining factory specifications, the engine remains fully compliant with the manufacturer's design standards.

Specifications and technical data

• SKU: A6420104447
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420104447
• Substitutable numbers: A6420104447, A 642 010 44 47, A6420104804, A 642 010 48 04
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Mileage: 119 000

Technical characteristics of the OM642 unit

The presented engine belongs to the OM642 family, which consists of modern, six-cylinder diesel units from Mercedes. The V6 configuration ensures balanced operation, and the diesel fuel system allows for an optimal combination of performance and fuel economy. This type of design is a popular choice for both fleet and private vehicles, where durability and stable performance over long periods of operation are essential.

The engine was designed to handle the loads typical of premium-class vehicles, which translates into adequate torque reserves and flexibility across a wide rev range. The use of six cylinders promotes smooth power delivery and reduces vibrations, which is particularly noticeable during highway driving.

Application in the Mercedes W212 E350 CDI

The OM642 powertrain in the version used in the W212 E350 CDI model is structurally matched to the architecture of this body style, cooling system, and control electronics. As a result, the engine works seamlessly with the vehicle's factory systems, such as the automatic transmission, safety systems, and advanced driver assistance systems. For workshops, this means predictable installation and the ability to use standard service procedures.

The engine from this series performs well in daily use, combining diesel engine efficiency with the driving comfort typical of the E-Class. This solution is suitable both for replacing a damaged engine and for a comprehensive drivetrain rebuild in vehicles used intensively.

Condition, mileage, and operational potential

The offered unit belongs to the group of used diesel engines, which allows for a significant reduction in repair costs compared to purchasing a brand-new component. The declared mileage allows for an assessment of its remaining operational potential and the planning of any necessary service tasks, such as inspecting the injection system, checking seals, or auxiliary components. This approach is particularly important in the case of modern V6 units, where regular maintenance has a direct impact on durability.

The engine is a good starting point for both a standard replacement and a more extensive project involving the refurbishment of key components. This allows for a favorable compromise between investment costs and the expected lifespan of the entire drivetrain.

Selection, installation, and service aspects

When selecting this unit for a specific Mercedes W212 E350 CDI, it is crucial to verify compatibility with the vehicle's configuration, including the trim level and the transmission used. Installation in a specialized workshop that is familiar with the specifics of OM642 engines and has the appropriate diagnostic equipment is recommended. This ensures proper ECU adaptation, fuel system bleeding, and verification of operating parameters after the first start-up.

For users and mechanics planning an informed purchase and installation of a used powertrain, we have prepared an expert guide discussing facts and myths related to such components – detailed information can be found in the article Why it is worth buying used gearboxes and engines – facts instead of myths.

OM642 engine – expert knowledge and upgrade possibilities

The OM642 family is well-documented in industry literature and service practice, which facilitates the planning of refurbishment work – from verifying injectors and checking the turbocharger to inspecting the intake system. For those who want to better understand the characteristics of this design, typical faults, and ways to restore full performance, the following technical material will be helpful: The second life of the Mercedes OM642 engine – how injectors and the turbocharger restore the power of the 3.0 V6 CDI.

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 blocks, cylinder heads, or complete long blocks, check the available parts in the Mercedes Engines category.

Summary

Engine 642850 Mercedes W212 E 350 CDI Bare Engine 642.850 OM642 WARRANTY is a reasonable choice for drivers and workshops looking for a proven, six-cylinder diesel unit for the E-Class. The V6 diesel design ensures high refinement, and the wide availability of service knowledge facilitates further maintenance and potential upgrades. It is a practical solution for those who want to restore the full functionality of the drivetrain while maintaining the characteristic driving qualities of a Mercedes.