Mercedes W169 A200 W245 B200 200 Petrol M266 266960 Bare Engine 266.960 WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a bare engine.

The engine is sold without accessories (e.g. alternator, starter motor, manifolds, injectors, turbocharger, etc.).

Mercedes W169 A200 W245 B200 200 Petrol M266 266960 Bare Engine 266.960 WARRANTY is an original powertrain unit from the M266 family, designed for A-Class and B-Class models, ideal as a replacement for the factory petrol engine. By maintaining the specific Mercedes design, it ensures consistency with the vehicle's factory architecture and predictable operating parameters. This is a solution for users who expect proven technology and compatibility with original equipment.

Specifications and technical data

• SKU: A2660100500
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2660100500
• Substitutable numbers: A2660100500, A 266 010 05 00
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Engine code: 266960
• Mileage: 59 000

Technical characteristics of the M266 unit

The presented engine belongs to the M266 petrol series, used in compact Mercedes A-Class and B-Class models. It features a four-cylinder layout that combines reasonable refinement with good fuel efficiency. The design was developed for transverse mounting in compact/van bodies, which facilitates direct replacement in W169 and W245 vehicles.

The unit is adapted for petrol fuel, allowing for smooth, predictable operation in typical urban and extra-urban conditions. The engine code enables unambiguous identification of the version and matching to a specific vehicle configuration, and the mileage reflects previous operation, which is important when planning further use.

Purpose and compatibility with Mercedes models

The engine was designed to work with the Mercedes A-Class W169 generation and B-Class W245 generation platforms, in A200 and B200 versions. This means maintaining factory mounting points, compatibility with original wiring harnesses, the engine control unit, as well as the cooling and intake systems intended for this series of units.

Thanks to this, with proper selection based on the engine code and part numbers, installation in place of a worn or damaged unit is possible without the need for structural interference with the body. This solution is particularly beneficial for workshops specializing in the Mercedes brand that expect a predictable installation process and a reduction in additional modifications.

Benefits of choosing a used OEM engine

Choosing an original engine from dismantling allows you to maintain the factory operating characteristics of the powertrain, without the risk of mismatch typical of random replacements. The unit comes from a previously operated vehicle, which allows for a realistic assessment of its history and technical condition based on mileage and workshop inspection.

A used OEM engine is also an opportunity to optimize repair costs – especially in the case of serious damage to the existing unit, where regeneration or deep repair is economically unjustified. In many cases, installing a complete used unit is faster and more predictable than rebuilding an old engine.

To better understand the differences between new, remanufactured, and used powertrains and gearboxes, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths. The article discusses, among other things, selection by OEM and VIN numbers and repair cost ratios.

Practical installation and operating tips

Before installation, a standard preparatory procedure is recommended, including checking for leaks, verifying the condition of external seals, checking the ignition system, and replacing consumables in accordance with the vehicle manufacturer's recommendations. Such an approach increases the chance of trouble-free operation after installation and facilitates subsequent service maintenance.

It is also worth paying attention to:

• selecting the appropriate engine oil in accordance with Mercedes specifications,
• proper bleeding of the cooling system after installation,
• verifying cooperation with the existing engine control unit and electrical installation,
• checking operating parameters after the first start-up (oil pressure, temperature, absence of abnormal noises).

Expanding repairs within the powertrain

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 powertrain units, check the available parts in the Mercedes Engines category.