Engine 642850 Mercedes W212 E 350 CDI Complete Engine 642.850 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.

Engine 642850 Mercedes W212 E 350 CDI Complete Engine 642.850 OM642 WARRANTY is an advanced V6 diesel unit designed for E-Class models, valued for its refinement and solid performance. This diesel engine has been engineered with durability, flexibility, and economy in mind, making it an attractive base for professional repair or powertrain replacement in your Mercedes. Thanks to its well-thought-out design and proven OM642 architecture, the unit provides an excellent balance between power and fuel consumption, while remaining fully compatible with the vehicle's factory systems.

Specifications and technical data

• SKU: A6420104447-1
• 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 powertrain

The presented engine belongs to the Engines category and represents the OM642 family, which consists of Mercedes' six-cylinder diesel units. The cylinder layout ensures smooth operation, high refinement, and an adequate torque reserve across the entire rev range. The use of diesel fuel promotes lower fuel consumption while maintaining appropriate dynamics, which is particularly important in premium cars such as the Mercedes W212 E350 CDI.

The engine has been designed as a structure compatible with the vehicle's factory electronics and auxiliary equipment, which facilitates integration with the existing installation. This makes it possible to maintain factory operating parameters, such as acceleration characteristics, throttle response, or cooperation with the automatic transmission, provided the vehicle is equipped with one.

Purpose and application in the Mercedes W212 E350 CDI

The OM642 powertrain in the version used in the E350 CDI model was developed for daily use in both urban and extra-urban conditions, while maintaining a power reserve for dynamic highway driving. The engine performs well in cars used on longer routes, where stable operation at constant speeds and favorable fuel consumption are of key importance.

In practice, this means that the unit in question will be suitable both for users expecting comfortable, calm driving and for drivers who require efficient acceleration and smooth overtaking from their Mercedes. The six-cylinder configuration promotes even power delivery, which translates into predictable vehicle behavior in various road conditions.

Benefits of choosing a used OM642 engine

Choosing a used engine from the OM642 family for a Mercedes W212 E350 CDI is a solution that allows you to significantly reduce repair costs compared to purchasing a brand-new unit. At the same time, you retain the original Mercedes design, which is important for durability, compatibility, and the vehicle's future resale value. The original Mercedes unit ensures consistency with factory control systems, the cooling system, and auxiliary equipment, minimizing the risk of installation issues.

The V6 diesel engine of this generation is well-known in the workshop environment, which facilitates diagnostics, service, and any further maintenance work. The availability of service parts and the experience of mechanics with this type of unit translate into more efficient installation and subsequent maintenance of the powertrain in proper technical condition.

What to look for when selecting an engine

When choosing a used engine for a Mercedes W212 E350 CDI, it is crucial to match the unit to the specific vehicle version and its equipment. It is worth paying attention to compatibility with the factory engine control unit, auxiliary equipment, and electrical installation. It is also important to perform basic service activities before installation, such as changing the oil, filters, or checking wear-and-tear components, which will help reduce the risk of unplanned downtime in the future.

The OM642 family engine, thanks to its design and popularity in the Mercedes range, is well recognized by specialized service centers. Professional installation and proper configuration with existing vehicle systems will allow you to fully utilize the potential of this unit, ensuring stable operation and predictable vehicle behavior after the repair.

Expanding repairs in the powertrain area and additional materials

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 powertrains, check out the available parts in the Mercedes Engines category.

To compare the characteristics of different powertrains and better understand potential operating costs, it is worth reading materials regarding other brands. For example, an article describing critical units in a popular model from the Bavarian manufacturer, available at the link Troublesome BMW E90 engines: check what can ruin your budget!, will allow you to better assess how important it is to make an informed choice of the right engine and proper service maintenance.