Mercedes-Benz W169 A160 A 160 CDI OM640 Complete Engine 640.942 640942 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-Benz W169 A160 A 160 CDI OM640 Complete Engine is a factory-spec power unit from the OM640 family, designed for the W169 A-Class diesel models. It offers proven, fuel-efficient performance and a design tailored for daily use in both urban and extra-urban traffic. Thanks to its complete set of components, it serves as a solid foundation for a professional engine replacement in your Mercedes.

Specifications and technical data

• SKU: A6400104744-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400104744
• Substitutable numbers: A6400104744, A 640 010 47 44, A6400100344, A 640 010 03 44
• Fuel type: Diesel
• Number of cylinders: 4
• Category: Engines
• Engine code: 640942
• Mileage: 56 900

Technical characteristics of the OM640 unit

The presented engine belongs to the Engines category and represents the Mercedes OM640 family of diesel units, designed for economical yet dynamic driving. The cylinder layout ensures smooth operation, good refinement, and predictable behavior under load. The diesel construction was developed with an emphasis on mechanical durability, stable combustion parameters, and efficient torque utilization across typical RPM ranges.

The engine is adapted for diesel fuel, which in practice means favorable fuel consumption and operating characteristics suitable for both city and highway driving. The cylinder layout promotes a balance between the unit's compact dimensions and sufficient power and flexibility, which is particularly important in A-Class models, where both drivetrain efficiency and ergonomic integration into the engine bay are key.

Purpose and compatibility with Mercedes W169 A160 CDI

Mercedes-Benz W169 A160 A 160 CDI OM640 Complete Engine has been configured for use in W169 models with the A160 CDI unit, where correct fitment to the factory installation and compatibility with vehicle accessories are essential. The engine code allows for unambiguous identification of the unit and matching it to the specific equipment version and control software in the car.

The completeness of the engine facilitates the replacement process – the mechanic receives a coherent power unit that can be integrated with the vehicle's existing drivetrain, reducing the need for additional modifications. This solution is particularly beneficial for post-accident repairs or when replacing a worn-out unit, where consistency of operating parameters and compliance with the manufacturer's factory specifications are important.

Operational parameters and condition

The engine comes from a vehicle operated under typical road conditions, and its mileage is at a level suitable for further use after proper replacement and service maintenance. As a used component, it represents an attractive cost-effective alternative to new units while maintaining the original manufacturer's specifications.

With proper diagnostics before installation and the use of appropriate operating fluids, a power unit with this mileage can provide a long service life. This is a particularly beneficial solution for users who want to restore the full performance of their Mercedes W169 A160 CDI while keeping repair costs at a reasonable level.

Benefits of using an original Mercedes engine

Using an original unit from the OM640 family in your vehicle translates into several significant advantages:

• preservation of factory engine operating characteristics and compatibility with vehicle electronics,
• consistency with the drivetrain and accessories intended for the A160 CDI version,
• the ability to restore the car's original performance and refinement,
• optimal fitment with the stock cooling and fuel supply systems.

Thanks to this, the original Mercedes engine is the preferred solution in professional workshops, where a predictable repair outcome and minimizing the risk of compatibility issues are prioritized.

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

Technical knowledge and additional materials

When planning an engine replacement, it is worth expanding your knowledge about typical design and operational problems of various engines to better assess the cost-effectiveness of the repair. Our guide on problematic units in a popular Bavarian brand model may be helpful – you can find it here: Problematic BMW E90 engines: check what can ruin your budget!. Although it concerns a different manufacturer, it shows what to look for when choosing a used power unit.

If you want to learn more about the subject of selecting used components and find out which drivetrain and accessory elements are most frequently chosen by drivers, check out our guide: The best used car parts – a guide to the most frequently chosen original parts. This is a practical supplement to your knowledge when making a decision about purchasing a used engine.