Mercedes W205 Automatic Gearbox Flywheel Starter Ring A6260300012

Mercedes W205 Automatic Gearbox Flywheel Starter Ring is a specialized component from the Flywheels and gears category, designed for powertrains with a diesel engine and an automatic transmission. This original used part ensures proper torque transfer, stable drivetrain operation, and correct interaction with the starter system and the gearbox.

Specifications and technical data

• SKU: A6260300012
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6260300012
• Substitutable numbers: A6260300012, A 626 030 00 12
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Flywheels & Flexplates

Purpose and role in the powertrain

The flywheel in a diesel-powered Mercedes W205 is responsible for storing the kinetic energy of the crankshaft, smoothing out rotational irregularities, and stabilizing the operation of the power unit. In combination with an automatic transmission, this component helps form a precise torque converter or intermediate module, which translates into smooth starting, gentle gear changes, and a reduction in vibrations transmitted to the chassis.

A properly selected flywheel is crucial for:

• maintaining smooth diesel engine operation across the entire rev range,
• correct interaction with the automatic transmission torque converter,
• stable starting and proper operation of the starter motor,
• reducing noise and vibrations in the cabin.

Benefits of using an original flywheel

The original flywheel dedicated to the Mercedes W205 has been designed for a specific drivetrain configuration, allowing it to maintain factory balance and stiffness parameters. This translates into:

• precise fitment to the crankshaft and automatic transmission components,
• maintaining the correct starting and acceleration characteristics,
• reducing the risk of incorrect installation compared to universal replacements,
• maintaining compliance with factory powertrain control strategies.

For diesel units, the appropriate mass and geometry of the flywheel are particularly important, as they influence the refinement at low RPMs and the durability of the components working within the drivetrain system.

Application in diesel systems with automatic transmission

In a diesel configuration with an automatic transmission, the flywheel operates under conditions of high torque and frequent load changes. Therefore, the design of this component is adapted to:

• transferring high torsional forces generated by the diesel engine,
• working with the hydraulics and control systems of the automatic transmission,
• maintaining stable idle speeds and smooth gear shifting.

Selecting a flywheel that complies with factory specifications is particularly important in vehicles equipped with advanced traction and stability control systems, which utilize precise engine speed data.

Characteristics of the used part

The presented item comes from the used parts segment, which allows for an economical repair of the drivetrain while maintaining the manufacturer's original specifications. This type of component is particularly attractive for technologically advanced models, where new parts can be significantly more expensive.

Before installation, standard workshop verification is recommended, including inspection of the working surfaces, the condition of the starter ring gear teeth, and any signs of overheating. A properly selected and verified flywheel allows for the restoration of correct drivetrain operation without the need to interfere with other sub-assemblies.

Integration with other drivetrain elements and additional resources

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Mercedes and need other elements from the same group, such as additional flywheels, mating gears, or intermediate components, check the available parts in the Mercedes flywheels and gears category.

For users considering broader drivetrain modifications or improving the performance characteristics of a diesel engine, the guide on selecting tuning components, available in the article The best used parts for tuning your car, may be helpful. If you want to better understand how to consciously choose elements from the secondary market and optimally utilize your service budget, it is also worth reading the practical guide Used parts – Your guide to the best offers in the automotive store.