Mercedes W169 W245 M266 Engine Piston Connecting Rod A2660301217

Mercedes W169 M266 Engine Piston Connecting Rod A2660301217 A2660300220 is an original part from the Pistons and Rings group, designed for Mercedes M266 series engines used in the W169 model. This used OEM component ensures factory geometry, proper fit, and maintenance of engine operating parameters in line with the manufacturer's specifications. It's a solution for users looking to restore the proper running of the engine while keeping service costs reasonable.

Specifications and technical data

• SKU: A2660301217
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2660301217
• Substitutable numbers: A2660301217, A 266 030 12 17, A 266 030 02 20, A2660300220
• Category: Pistons & Rings

Purpose and Function in the M266 Engine

The piston with connecting rod is responsible for converting the energy from the combustion of the fuel-air mixture into rotational motion of the crankshaft. In the M266 engine, using the correct piston-connecting rod set is crucial for:

• maintaining correct cylinder compression,
• stable engine operation across the full RPM range,
• reducing vibrations and mechanical noise,
• even load distribution on the crankshaft-piston assembly.

Selecting a component that matches the factory specification helps maintain the characteristic performance of Mercedes engines – predictable, smooth, and resistant to prolonged loads.

Construction and Advantages of the Original Piston with Connecting Rod

The offered piston with connecting rod comes from the Mercedes production line, meaning it retains the original design, manufacturing tolerances, and surface treatment technologies. In practice, this translates to:

• proper piston guidance within the cylinder and reduced bore wear,
• correct balancing of the connecting rod relative to other assembly components,
• compatibility with the stock crankshaft and piston pin,
• maintenance of the factory compression ratio and torque characteristics.

Thanks to this, the piston with connecting rod for Mercedes W169 with M266 engine is suitable for both standard repairs and comprehensive engine rebuilds where the consistency of all crankshaft-piston assembly elements is important.

Condition, Verification, and Service Application

The component is offered as a used part, which significantly reduces engine overhaul costs while maintaining the original manufacturer's specifications. This type of component is particularly useful in situations where:

• mechanical damage to a single cylinder has occurred (seizure, valve impact, overheating),
• replacement of a single piston with connecting rod is necessary without affecting the entire set,
• maintaining compliance with the original M266 engine design is important.

Choosing an original, used part from this group helps avoid problems with fitting aftermarket alternatives of uncertain quality and simplifies workshop operations due to predictable installation.

Benefits of Using Original Mercedes Pistons and Rings

Using parts from the Pistons and Rings category sourced directly from Mercedes supports long-term, stable engine operation. The most significant benefits include:

• maintaining factory assembly clearances and crankshaft-piston assembly geometry,
• reduced risk of engine malfunction after repair (knocking, loss of compression, excessive oil consumption),
• easier diagnostics and future servicing due to compliance with manufacturer documentation,
• the possibility of using existing assembly procedures and torque specifications intended for the M266 engine.

For workshops specializing in the Mercedes brand, this solution allows for maintaining a high standard of repairs while optimizing costs for the end customer.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as pistons, rings, or repair kits, check the available parts in the Mercedes Pistons and Rings category.

For users interested in deepening their knowledge about selecting engine components, turbochargers, and accessories, our practical service guide may be helpful – check out the article BMW Code B58 – Pre-Purchase Checklist for Turbocharger and Intercooler for BMW 3 Series (G20), where we discuss compatibility verification, OEM numbers, and installation procedures, which are also useful when working with engines from other brands.