Engine 642830 Mercedes W204 C 350 CDI Complete Engine 642.830 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 642830 Mercedes W204 C 350 CDI Complete Engine 642.830 OM642 WARRANTY is a complete powertrain unit from the V6 family, designed for C-Class models equipped with a diesel engine. A used engine from this series is a solution for users looking for a technically advanced yet economical way to restore the full efficiency of the drivetrain. By maintaining the factory Mercedes design, the unit ensures consistency with the vehicle's original architecture and predictable operating parameters.

Specifications and technical data

• SKU: A6420100398-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420100398
• Substitutable numbers: A6420100398, A 642 010 03 98, A6420102043, A 642 010 20 43
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Mileage: 99 900

Technical characteristics of the powertrain unit

The presented engine belongs to the Engines category and represents a modern V6 diesel construction developed by the Mercedes engineering department. The use of diesel fuel allows for a favorable compromise between dynamics and fuel consumption, which is particularly important in mid-size premium cars. The six-cylinder layout ensures smooth operation, good flexibility across the entire rev range, and stable thermal conditions under loads typical for highway driving.

A complete engine of this type is designed as the central element of the drivetrain, working in harmony with factory control systems, auxiliary equipment, and the transmission system. This makes it possible to maintain the vehicle's original characteristics, such as smooth acceleration, predictable throttle response, and adequate torque reserve at higher speeds.

Application in Mercedes W204 / S204 C 350 CDI

The unit was developed for the W204 and S204 generation C-Class models in the C 350 CDI version, which means it is perfectly matched to the factory engine bay, mounting points, and cooling and intake systems. Such a configuration facilitates installation in the vehicle, reducing the need to modify additional components. Maintaining the original architecture of the drivetrain translates into predictable car behavior both in daily use and under heavier loads, e.g., when driving fully loaded or with a trailer.

A complete engine is a particularly beneficial choice in situations where the existing unit has suffered serious mechanical or thermal damage. Replacing it with a complete powertrain unit allows for a shorter repair time compared to extensive regeneration of multiple components, while simultaneously maintaining structural consistency with Mercedes factory solutions.

Benefits of choosing a used Mercedes engine

Choosing a used V6 diesel engine for a Mercedes C-Class is a solution that allows for significant cost savings compared to purchasing a brand-new unit. At the same time, compatibility with the original equipment and the vehicle's electronic systems is maintained. For many users, this means the possibility of restoring the car's full functionality within a reasonable budget, without sacrificing the brand's characteristic refinement and driving dynamics.

To better understand the differences between new and used powertrain units, as well as to learn about selection procedures based on identification numbers and real cost proportions, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths. The article discusses the practical aspects of purchasing used engines, which facilitates making an informed service decision.

Selection, compatibility, and area of application

When selecting this unit for a specific Mercedes C-Class vehicle, it is crucial to verify compatibility with the vehicle's configuration, including the auxiliary equipment, engine control unit, and transmission. The V6 diesel engine is designed to work with advanced engine management systems, which allows for optimization of combustion, emission reduction, and maintenance of stable operating parameters under various operating conditions.

A used powertrain unit of this type will perform well both in cars used for daily commuting and in vehicles covering longer distances, where durability, thermal stability, and adequate power reserve are important. Thanks to the V6 diesel construction, it is possible to achieve favorable torque characteristics at relatively low engine speeds, which translates into driving comfort and less stress on other drivetrain components.

Expanding repairs in the drivetrain area

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