Mercedes W203 CL203 C 200 CDI Complete Engine 646962 OM646 646.962 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 W203 CL203 C 200 CDI Complete Engine 646962 OM646 646.962 WARRANTY is an original power unit from the OM646 family, designed for C-Class diesel models. This four-cylinder diesel engine provides a solid foundation for professional repair or engine replacement, ensuring consistency with the vehicle's factory design. By maintaining the manufacturer's specifications, the engine remains compatible with factory-fitted auxiliary systems and control units.

Specifications and technical data

• SKU: A6460101546-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6460101546
• Substitutable numbers: A6460101546, A 646 010 15 46, A6460109744, A 646 010 97 44
• Fuel type: Diesel
• Number of cylinders: 4
• Category: Engines
• Mileage: 99 000

Technical characteristics of the OM646 unit

The engine belongs to the family of Mercedes diesel units, designed with durability and operating economy in mind. The four-cylinder construction promotes balanced operation, and the use of Diesel fuel allows for an advantageous fuel consumption-to-performance ratio. The unit is adapted to work with the factory fuel injection system and engine control unit used in W203 and CL203 C 200 CDI models.

The OM646 engine family is valued in the industry for its stable performance over high mileages and good resistance to the loads typical of daily operation. The design solutions used facilitate servicing and diagnostics, which is important for both workshops and users planning long-term vehicle use after replacing the power unit.

Purpose and compatibility with Mercedes W203 / CL203 C 200 CDI

The offered engine is intended for use in Mercedes C-Class W203 and CL203 generation vehicles in the C 200 CDI version. Thanks to the preservation of factory construction specifications, it is possible to restore the original performance parameters of the drive without the need for modifications to the vehicle's installation. The unit is suitable both as a replacement in the event of a failure and for a comprehensive drivetrain rebuild.

The unit's mileage allows for an assessment of its service history and the planning of further maintenance activities after installation. In workshop practice, such an engine often represents a cost-effective alternative to reconditioning a heavily worn or damaged drive, reducing vehicle downtime and simplifying the repair process.

Benefits of choosing a used diesel engine

Purchasing a used diesel engine for a Mercedes allows for a significant reduction in repair costs compared to a brand-new unit, while maintaining compliance with the original specification. Engines from the OM646 family are well-recognized by workshops, which facilitates their installation, configuration, and subsequent service. For many users, this is a reasonable compromise between budget and the expected remaining service life of the vehicle.

If you want to better understand the differences between new and used powertrain components, selection procedures based on identification numbers, and the real costs of such repairs, check out our guide Why it is worth buying used gearboxes and engines – facts instead of myths. This is a practical addition to your knowledge when planning a power unit replacement.

Practical installation and operating tips

Before installation, it is recommended to perform a standard package of service activities, such as replacing consumables and checking the accessories working with the power unit. This allows for optimizing the engine's future performance and limiting the risk of unplanned downtime. In the case of diesels, proper diagnostics of the injection system and the tightness of the intake and exhaust systems are particularly important.

For users of vehicles with a diesel engine, expert material regarding the fuel supply system, which discusses typical symptoms and the consequences of neglect, may also be helpful. In this context, it is worth reading the article Diesel injector faults – how to recognize them and what are the risks of neglecting them, to better plan preventive maintenance after replacing the power unit.

Expanding the scope of work in the Mercedes engine area

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 additional power units, blocks, or short blocks, check the available parts in the Mercedes Engines category.