Mercedes W204 C 350 CDI Complete Engine 642834 642.834 265HP 99k miles, 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.

Mercedes W204 C 350 CDI Complete Engine 642834 642.834 265HP 99k miles, WARRANTY is a complete powertrain unit from the V6 CDI family, designed for demanding users who expect solid dynamics and high refinement. The engine belongs to the popular series of Mercedes diesel designs, valued for their efficiency, flexibility, and seamless compatibility with both automatic and manual transmission systems. Thanks to the completeness of the accessories, it serves as a practical base for a professional engine replacement in C-Class models.

Specifications and technical data

• SKU: A6420100798-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420100798
• Substitutable numbers: A6420100798, A 642 010 07 98
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Engine code: 642834
• Mileage: 99 000

Technical characteristics of the V6 CDI unit

The presented engine belongs to the Engines category and represents a modern V6 diesel design. The use of diesel fuel allows for a favorable combination of torque and moderate fuel consumption, which translates into efficient acceleration across the full rev range and stable performance at higher highway speeds. The six-cylinder configuration ensures good smoothness, reduced vibrations, and higher refinement compared to four-cylinder units.

The engine was designed for use in executive cars, where both ride comfort and adequate power reserves are important. The engine code assigned to this unit identifies the specific design version, which facilitates the selection of accessories, control units, and compatible components during installation or potential repairs.

Purpose and application in the Mercedes W204 C 350 CDI

The engine was developed for use in the Mercedes C-Class W204 generation in the C 350 CDI version, where it is responsible for dynamic acceleration, smooth power delivery, and comfortable long-distance travel. This unit performs well both in daily city driving and in intensive highway use, providing adequate flexibility for overtaking and stable cruising speed maintenance.

Thanks to the completeness of the unit, it is possible to carry out an engine replacement while minimizing vehicle downtime. This solution is particularly beneficial for workshops specializing in the Mercedes brand, as well as for users who want to restore their car to full efficiency without the need for a long-term rebuild of the existing unit.

Condition, mileage, and benefits of installing a used engine

The offered engine is a secondary market component, which allows for significant repair cost savings compared to a brand-new unit. The declared mileage allows for an assessment of the wear level and the planning of potential service activities, such as replacing consumables or checking selected components before installation. This approach allows for optimizing the repair budget while maintaining an appropriate level of reliability.

Choosing a complete V6 diesel engine for the Mercedes W204 C 350 CDI is a beneficial solution for users who expect a proven design, good driving performance, and the possibility of further vehicle operation without the need to invest in a costly rebuild of an old unit. The completeness of the engine simplifies the installation process and reduces the risk of accessory component incompatibility.

Why choose a unit from the Mercedes Engines family

Mercedes diesel engines from this series are widely described in industry literature and technical forums as designs with good mileage potential, provided that high-quality fuel is used and regular service is maintained. Compared to some problematic units from other brands, choosing a refined V6 CDI allows for reducing the risk of major failures while maintaining high performance. For comparison with other solutions available on the market, it is worth checking the analysis of competing units, such as those described in the article faulty BMW E90 engines and their typical operational problems, which clearly shows the differences in the manufacturers' design approaches.

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