Mercedes R172 SLK 250 CDI Complete Engine 651980 651.980 204HP 45k, 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 R172 SLK 250 CDI Complete Engine 651980 651.980 204HP 45k, WARRANTY is a factory-spec CDI engine unit designed for installation in the R172 generation SLK model. This is a modern four-cylinder diesel engine that provides dynamic acceleration and stable performance, proving itself both in daily use and during more demanding driving. Thanks to the completeness of the accessories, it serves as a convenient service solution, allowing for an efficient replacement of the entire powertrain.

Specifications and technical data

• SKU: A6510101511-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510101511
• Substitutable numbers: A6510101511, A 651 010 15 11
• Fuel type: Diesel
• Number of cylinders: 4
• Category: Engines
• Engine code: 651980
• Mileage: 45 000

Technical characteristics of the unit

The presented engine belongs to the modern family of Mercedes diesel units, designed for efficient diesel combustion and stable operation across a wide rev range. The four-cylinder layout ensures a good balance between performance and refinement, while the use of high-pressure injection technology promotes precise fuel metering. The version used in the SLK 250 CDI offers a distinct torque reserve, which translates into efficient overtaking and comfortable highway driving.

The engine was constructed for operation in a sport-tuned roadster, which is why it stands out for its quick throttle response and predictable behavior under load. The unit works well with both automatic and manual transmissions, which facilitates its use in various factory configurations of the R172 model.

Purpose and compatibility

The complete engine is dedicated to the Mercedes SLK 250 CDI of the R172 generation and corresponds to the factory specification of the unit installed in this model. By maintaining the original engine code, it is possible to precisely match it to a specific vehicle version, taking into account the installed accessories and powertrain configuration. This solution is particularly beneficial for major repairs, such as replacing a damaged engine after a mechanical failure or overheating.

A diesel unit of this type will perform well in cars used intensively – on long routes, with frequent highway mileage, and in daily city use. Using an original powertrain unit allows for consistency with the factory vehicle electronics, which reduces the risk of communication issues between control units and facilitates subsequent diagnostics.

Benefits of choosing a complete used engine

Choosing a complete, used engine for a Mercedes SLK 250 CDI is a solution that allows you to significantly reduce repair costs compared to purchasing a new unit or performing a complex rebuild of an old engine. Using an original unit from the same design family facilitates installation, shortens vehicle downtime, and reduces the risk of component incompatibility. An additional advantage is the preservation of factory operating characteristics, which is important for driving comfort and the predictability of the car's reactions.

If you want to better understand how to safely and consciously choose used powertrain units, it is worth checking out the expert guide on our blog: Why it is worth buying used gearboxes and engines – facts instead of myths. There you will find a discussion of the most common myths, practical tips on selection by identification numbers, and sample repair cost calculations.

Condition, mileage, and service application

The engine comes from a vehicle used under standard road conditions and is offered as a used item, which represents a reasonable compromise between cost and functionality. The declared mileage of the unit is important information when planning further operation – it allows you to assess the potential durability reserve and select the appropriate scope of service activities after installation, such as changing operating fluids or checking accessories.

In practice, such an engine will work well both as a base for direct installation and as a starting point for more advanced preventive maintenance (e.g., replacing selected seals or accessory components before installation in the car). This allows you to optimize repair costs while increasing the predictability of the vehicle's further operation.

Mercedes engines – expansion and modernization of the powertrain

If you are planning a comprehensive repair or modernization 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.