Engine 642852 Mercedes W212 E 350 CDI Complete Engine 642.852 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 642852 Mercedes W212 E 350 CDI Complete Engine 642.852 OM642 WARRANTY is a six-cylinder diesel unit from the OM642 family, designed for E-Class models, engineered for stable operation and high driving refinement. This diesel-powered engine is suitable for both daily use and more demanding conditions, offering solid performance parameters. By maintaining factory specifications, it serves as an appropriate base for professional repair or replacement of the power unit in your Mercedes.

Specifications and technical data

• SKU: A6420104345-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420104345
• Substitutable numbers: A6420104345, A 642 010 43 45, A6420103703, A 642 010 37 03, A6420109908, A 642 010 99 08
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Mileage: 82 000

Technical characteristics of the OM642 unit

The presented engine belongs to the Engines category and represents a family of modern Mercedes diesel units based on a V6 layout. The use of six cylinders allows for good operational smoothness, reduced vibrations, and ensures seamless torque delivery, which is particularly noticeable during dynamic acceleration and highway driving.

The diesel construction was developed with a focus on efficient combustion and reasonable fuel consumption while maintaining an adequate power reserve. The OM642 unit is widely used across the Mercedes range, which facilitates servicing, access to technical documentation, and the selection of accessories and consumables.

Application in Mercedes W212 and C218

The engine was intended for installation in Mercedes E-Class models of the W212 generation and the C218 body style, in E350 CDI and E 350 BlueTEC variants. This means it is structurally matched to factory mounting points, the drivetrain, and the vehicle's electrical system, which facilitates replacement during professional repairs.

This unit is particularly valued in applications where a combination of driving comfort, flexibility, and durability is important. Proper selection of the engine for a specific equipment version and vehicle year allows for the preservation of full functionality of factory systems, such as the automatic transmission, driver assistance systems, or advanced exhaust emission systems.

Benefits of installing a used OM642 engine

Choosing a used engine from the OM642 family for a Mercedes W212 or C218 is a solution that allows for significant cost savings compared to purchasing a brand-new unit, while maintaining compliance with the manufacturer's original specifications. Thanks to the preservation of the factory V6 Diesel architecture, it is possible to utilize the existing vehicle infrastructure without the need for costly mechanical or electrical modifications.

An engine with such mileage provides a good base for further operation after performing standard service procedures, such as oil and filter changes or inspection of accessories. For workshops specializing in the Mercedes brand, this is an attractive option that allows for efficient execution of major power unit repairs while maintaining a reasonable budget for the client.

What to pay attention to during selection and installation

Before installation, it is worth verifying the unit's compatibility with the specific vehicle equipment version, model year, and installed accessories (e.g., fuel injection system, turbocharger, exhaust system). It is also recommended to:

• perform a leak test of the oil and cooling systems,
• verify the condition of timing components and auxiliary equipment,
• update the engine control unit software in accordance with the vehicle manufacturer's guidelines,
• use high-quality oil and filters compliant with Mercedes standards.

Such an approach helps minimize the risk of unplanned downtime and ensures stable operation of the unit in the long term.

Mercedes engines – further expansion and technical knowledge

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 long blocks, check the available parts in the Mercedes Engines category.

For a comparison of the characteristics of different power units and a better understanding of potential repair costs, it is worth consulting educational materials. A practical supplement to your knowledge can be an article describing typical problems with power units in another popular premium model – you can find it here: Faulty BMW E90 engines – a practical guide to problematic units.