Mercedes-Benz W204 W207 W212 OM642 Gearbox Flywheel Starter Ring A2780300012

Mercedes-Benz W204 W207 W212 OM642 Gearbox Flywheel Starter Ring is an original component from the Flywheels and gears group, designed for OM642 diesel engines in Mercedes vehicles. This is a solution for users who expect stable drivetrain operation, correct torque transmission, and predictable engine behavior during starting and gear shifting.

Specifications and technical data

• SKU: A2780300012
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2780300012
• Substitutable numbers: A2780300012, A 278 030 00 12, KZ
• Category: Flywheels & Flexplates

Technical characteristics of the flywheel

The flywheel in the OM642 engine is responsible for balancing the operation of the diesel unit, stabilizing engine speed, and efficiently transferring torque to the gearbox. Its precisely balanced construction reduces torsional vibrations, which improves drivetrain refinement and reduces the load on other system components.

The component belongs to the Flywheels and gears group, ensuring it works with the starter and drivetrain in accordance with the manufacturer's factory specifications. A properly matched gear profile ensures correct engagement with the starter ring gear, which translates into reliable engine starting under various operating conditions.

Application in Mercedes W204 and W212 models

The presented flywheel is intended for Mercedes W204 and W212 class vehicles equipped with the OM642 diesel engine. Using an original component from this group allows you to maintain factory drivetrain performance parameters, including:

• proper cooperation with the clutch system or automatic transmission,
• stable idle speed and smooth acceleration,
• reduction of vibration and noise in the cabin,
• consistency with factory engine control strategies.

By maintaining compatibility with the solutions used by the manufacturer, the installation of this flywheel does not require structural modifications to the engine or gearbox, which facilitates service work and reduces vehicle downtime.

Condition, origin, and benefits of choosing a used component

The offered component is in used condition, which provides a favorable compromise between repair costs and maintaining the original technical specification. Choosing a used flywheel from a Mercedes vehicle allows you to maintain material and structural consistency with other drivetrain components while reducing expenses compared to a brand-new part.

This solution is particularly attractive for users who:

• plan long-term operation of a vehicle with an OM642 engine,
• want to maintain the original character of the engine's operation,
• are looking for a technically matched element from the Flywheels and gears group without having to use replacements with uncertain parameters.

If you are interested in a broader context of using second-hand parts in car modernization and customization projects, it is worth reading the article The best used parts for tuning your car, which discusses a practical approach to tuning using proven used components.

Why choose an original Mercedes solution

For components such as the flywheel, compatibility with the factory engine design and predictable behavior during long-term operation are of key importance. The original component from the Flywheels and gears group ensures:

• matching the torque characteristics of the OM642 engine,
• cooperation with factory control software,
• maintenance of the drivetrain operating tolerances specified by the manufacturer.

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as additional flywheels, selected gears, or related drive components, check the available parts in the Mercedes Flywheels and gears category.

Summary

Mercedes-Benz W204 W207 W212 OM642 Gearbox Flywheel Starter Ring is a technically matched, used drivetrain component designed for OM642 diesel engines in Mercedes vehicles. Choosing this component allows you to restore proper engine and gearbox operation, maintain factory drivetrain performance parameters, and optimize service costs while preserving original construction quality.