Mercedes W204 W207 W212 Piston Connecting Rod Conrod Head Diesel A6510302017

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W204 W207 W212 Piston Connecting Rod Conrod Head Diesel is a precision component of the crank-piston system designed for Mercedes diesel engines. Using a pre-owned component from this group allows for an economical yet technically sound engine repair, maintaining factory performance characteristics. Thanks to its original design, it ensures stable transfer of combustion forces and proper cooperation with other engine components.

Specifications and technical data

• SKU: A6510302017-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510302017
• Substitutable numbers: A6510302017, A 651 030 20 17
• Fuel type: Diesel
• Category: Pistons & Rings

Purpose and function in a diesel engine

The presented piston with connecting rod and conrod head operates in a diesel engine, where it is responsible for converting combustion energy into the rotational motion of the crankshaft. This assembly handles high mechanical and thermal loads, which is why its correct selection is crucial for the engine's smooth operation, compression, and the durability of the entire system.

In Mercedes W204, W207, and W212 series diesel engines, the proper geometry of the piston and connecting rod affects:

• correct piston positioning in the cylinder and stable guidance in the liner,
• maintenance of the proper compression ratio,
• even distribution of forces to the crankshaft,
• reduction of engine vibration and noise.

Construction of the piston–connecting rod–conrod head assembly

The assembly consists of a piston connected to a connecting rod and a conrod head, forming a complete working unit for one cylinder. This solution facilitates service and allows for consistent replacement of the entire load-bearing path in a given cylinder. The construction is adapted to the operating characteristics of diesel engines, where high combustion pressures and large inertial forces occur.

Properly selected fits within the piston pin and connecting rod journal ensure:

• smooth operation at high rotational speeds,
• reduced risk of seizure with proper lubrication,
• stable guidance of the connecting rod on the crankshaft journal.

Application in Mercedes vehicles

Mercedes W204 W207 W212 Piston Connecting Rod Conrod Head Diesel is intended for power units installed in popular mid-size and luxury Mercedes models. Replacing this element is particularly important during engine overhauls following seizure, mechanical damage to the piston or connecting rod, as well as repairs after lubrication system failure.

Selecting the correct piston–connecting rod–conrod head assembly helps restore:

• stable compression pressure in the cylinder,
• even operation of all cylinders,
• proper dynamics and flexibility of the diesel engine.

Benefits of using an original pre-owned component

A pre-owned element from the Pistons and rings group represents a reasonable compromise between repair costs and maintaining engine performance parameters. Compared to low-quality replacements, the original piston–connecting rod–conrod head assembly ensures:

• preservation of factory geometry and balance,
• better cooperation with the existing crankshaft and engine block,
• greater predictability of behavior under load.

For workshops specializing in Mercedes diesel engine repairs, this solution allows for professional engine regeneration at controlled material costs.

Support with selection and expanding the scope of repair

When planning an engine overhaul, it is worth verifying the condition of other crank-piston system components and major engine subassemblies. Correct selection of components, in accordance with the manufacturer's documentation, minimizes the risk of repeated disassembly and reduces vehicle downtime.

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

Additionally, when deciding to use pre-owned components in vehicle repairs, it is worth familiarizing yourself with practical tips regarding the selection and operation of such solutions – the article on when it is worth choosing pre-owned electronic components and how to consciously select second-hand parts may be helpful.