Mercedes-Benz OM642.8xx 3.0L V6 CDI Engine – Complete 265 HP Unit for E-Class & C-Class

Complete, Low-Mileage 3.0L V6 Turbo Diesel Engine for Mercedes E-Class (W212) & C-Class (W207).

This listing is for a complete, original Mercedes-Benz OM642.852 or .838 3.0L V6 turbocharged diesel engine, producing 265 horsepower. Removed from a 2013 donor vehicle with a low 108,327 km (~67,310 miles), this fully dressed assembly is the high-output variant of the renowned OM642 engine. It provides a direct-fit core for engine replacement in key Mercedes-Benz models, offering a balance of smooth power, strong torque, and proven durability.

Product Overview & Core Specifications

• Engine Family: Mercedes-Benz OM642 (Late BlueTEC version)

• Engine Code: OM642.852 or OM642.838 (265 HP variants) – Confirm which specific code

• Aspiration: Single Turbocharger with Variable Geometry Turbine (VGT)

• Displacement: 3.0L V6 Turbo Diesel

• Power Output: 265 HP (195 kW)

• Mileage: 108,327 km (~67,310 mi) – Low

• Year: 2013

• Condition: Used, Complete & Dressed Assembly

• Key Feature: Common rail injection, AdBlue (SCR) system for emissions compliance.

Vehicle Compatibility & Fitment

• Primary Applications:

  • Mercedes-Benz E-Class (W212) E 350 CDI / BlueTEC (Model Years ~2009-2016)

  • Mercedes-Benz C-Class (W204) C 350 CDI / BlueTEC (Model Years ~2008-2014)

  • Also fits GLK (X204), ML/GL (W164/X164), and others with verification of ancillaries.

• Electronic & Model-Specific Differences: While the core engine is the same, critical components are not universal:

  • Engine mounts, oil pans, and accessory drives differ between the E-Class (W212) and C-Class (W204) due to different engine bays.

  • The Engine Control Unit (ECU) is uniquely calibrated for the specific model, transmission, and emissions equipment. For a direct, hassle-free swap, it is imperative to use the original recipient vehicle’s ECU and complete engine wiring harness.

  • Emissions Systems: This engine includes a Diesel Particulate Filter (DPF) and SCR (AdBlue) system. These components and their control units must be compatible.

What’s Typically Included & Condition Assessment

This is a complete, dressed engine as removed. It should include:

• Complete V6 long block with the turbocharger and exhaust manifold.

• Intake manifold with swirl flap motor (inspect mechanism).

• High-pressure fuel pump, fuel rails, and injectors.

• Complete engine wiring harness and the ECU (EDC) – Specify if included and donor model.

• EGR valve/cooler, thermostat, and all sensors.

• Condition: OM642-Specific Due Diligence is Required:

  • Service History: Request records for the timing chain service (less common failure than on earlier OM642, but check for any related work or rattling on cold start).

  • Swirl Flaps: The intake manifold swirl flap linkage is a known wear item. Failure can lead to engine damage. Inquire if it has been inspected, repaired, or deleted.

  • Oil Leaks: Critical inspection points: Valve cover gaskets, oil cooler seals (very common), and the turbo oil return line seal.

  • DPF/EGR Health: Ask if the emissions systems were functioning properly to avoid costly repairs post-installation.

  • Turbo Actuator: Verify the variable geometry turbo actuator moves freely and holds vacuum.

Secure a low-mileage core for a robust diesel repair. Before purchasing, confirm the specific engine code, request available service history, perform a detailed visual inspection for oil leaks (especially at the oil cooler), and have a clear plan to use your original vehicle’s ECU and emissions components for seamless integration.