Flywheel Ring Mercedes W211 C218 OM642 Automatic Gearbox Starter A6420300312

Mercedes W211 OM642 Flywheel A6420300312 is a component from the Flywheels & Gears category, designed to work with the OM642 engine and an automatic transmission. This is a used Mercedes part that allows for a technically correct repair of the drivetrain while maintaining the factory performance characteristics of the engine and gearbox.

Specifications and technical data

• SKU: A6420300312
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420300312
• Substitutable numbers: A6420300312, A 642 030 03 12
• Gearbox type: Automatic
• Category: Flywheels & Flexplates

Flywheel Purpose and Function

The flywheel in the W211 model with the OM642 engine is responsible for stabilizing crankshaft revolutions and correctly transferring torque to the automatic transmission. A properly selected component ensures:

• smoother starts and gear changes in automatic mode,
• reduced vibrations transmitted to the body and drivetrain,
• more predictable drivetrain response under load.

By maintaining correct geometric and mass parameters, the flywheel working with the OM642 engine helps to keep the powertrain running smoothly across the entire RPM range.

Compatibility with Automatic Transmission

The presented flywheel has been designed to work with an automatic transmission, which is crucial for the proper operation of the entire system. The design adapted for automatic gearboxes allows for:

• proper torque transfer to the converter,
• maintaining adequate rigidity of the connection with the crankshaft,
• limiting undesirable torsional vibrations in the drivetrain.

For owners of Mercedes W211 with the OM642 engine, choosing a flywheel matched to an automatic transmission is important for both durability and driving comfort.

Characteristics of a Used Mercedes Part

The offered component is from the Mercedes brand, which means it retains the factory geometry, bolt hole pattern, and parameters required by the vehicle manufacturer. As a used part, the flywheel offers a reasonable compromise between repair cost and maintaining the original technical specifications.

In practice, this means:

• easier integration with the existing drivetrain,
• no need for modifications to engine or gearbox accessories,
• the possibility of restoring proper drivetrain operation while adhering to original design assumptions.

Application in Service and Tuning

The flywheel for the OM642 in the W211 is often used in both standard repairs and more advanced drivetrain modifications, where maintaining proper cooperation with the automatic transmission is key. For those considering drivetrain upgrades or strengthening, the article Best Used Parts for Tuning Your Car, which describes a practical approach to selecting used components, may be a valuable source of information.

Related Components and Further Part Selection

If you are planning a comprehensive service of the drivetrain in your Mercedes W211 with the OM642 engine, including other drivetrain and starting system components, check the available parts in the Mercedes Flywheels & Gears category.