Mercedes W204 M274 Flywheel Automatic Gearbox Starter Ring Gear A2740300012

Mercedes W204 M274 Flywheel Automatic Gearbox Starter Ring Gear is a component from the Flywheels and ring gears category, designed for gasoline engines paired with an automatic transmission. Using this type of pre-owned component allows for an economical yet technically sound repair of the drivetrain in Mercedes vehicles, while maintaining the proper operating standards of the engine and transmission.

Specifications and technical data

• SKU: A2740300012-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2740300012
• Substitutable numbers: A2740300012, A 274 030 00 12
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Flywheels & Flexplates

Purpose and function of the flywheel

The flywheel in the M274 engine is responsible for stabilizing crankshaft rotation and correctly transferring torque to the automatic transmission. In gasoline units, it plays a key role in dampening torsional vibrations, which results in smoother drivetrain operation, reduced stress on mating components, and lower noise levels in the cabin.

In an automatic transmission configuration, the flywheel works with the torque converter, ensuring precise positioning and a stable connection to the transmission's clutch system. A correctly selected component allows for the maintenance of factory drivetrain performance parameters, which is particularly important in modern Mercedes gasoline engines.

Benefits of using an original pre-owned component

Using a pre-owned flywheel dedicated to the M274 engine in the W204 chassis allows for compliance with factory specifications without the need to invest in a new assembly. An original component from the same design group:

• maintains proper balance of the crank-piston system,
• supports correct interaction with the automatic transmission,
• reduces the risk of improper fitment with the starter and ring gear,
• allows for the preservation of the operating characteristics typical of Mercedes gasoline units.

For the user, this means more predictable drivetrain behavior, stable starting, smooth gear shifts, and reduced stress on other system components.

Installation and operational aspects

The flywheel designed for use with an automatic transmission requires precise installation, adhering to correct tightening torques and proper alignment relative to the crankshaft. In workshop practice, it is essential to:

• thoroughly clean the contact surfaces with the crankshaft and converter,
• verify the condition of the ring gear for compatibility with the starter,
• check for any axial and radial play after installation,
• verify the correct operation of the starter after the first start-up.

In the case of gasoline units, it is particularly important to maintain the appropriate stiffness and balance of the flywheel so as not to transfer excessive vibrations to the body and drivetrain. A pre-owned component, selected according to its intended use, allows these parameters to be maintained at a level acceptable for daily operation.

Application in the Mercedes drivetrain

Mercedes W204 M274 Flywheel Automatic Gearbox Starter Ring Gear is a part of the drivetrain system designed for use with a gasoline engine and an automatic transmission. Proper selection of this component influences:

• idle stability and reduction of vibrations on the body,
• smoothness of gear engagement in the automatic transmission,
• longevity of the torque converter and internal transmission components,
• vehicle comfort in city traffic and on the highway.

For workshops specializing in the Mercedes brand, using a dedicated flywheel facilitates diagnostics and eliminates problems resulting from the improper fitment of replacement parts.

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 gears, intermediate elements, or additional components interacting with the starter, check the available parts in the Mercedes flywheels and ring gears category.

Additional information and service cost optimization

When planning a drivetrain repair, it is worth analyzing the total cost of service, taking into account the use of original pre-owned components. Owners of other brands, such as Volkswagen, can additionally benefit from advice on the effective use of the pre-owned parts market – you can find more practical tips in the article Repairing a Volkswagen on a budget – how to save on original car parts, which shows a universal approach to optimizing service costs in other vehicles as well.