Mercedes W176 C117 X156 Flywheel Starter Motor Ring Gear Sprocket A6510305405

Mercedes W176 C117 X156 Flywheel Starter Motor Ring Gear Sprocket is an original component from the Flywheels and Gears group, designed for use in Mercedes compact series powertrains. This used OEM part ensures factory-standard geometry, proper engagement with the starter motor, and stable interaction with the drivetrain, which translates into reliable starting and correct engine operation.

Specifications and technical data

• SKU: A6510305405
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510305405
• Substitutable numbers: A6510305405, A 651 030 54 05
• Category: Flywheels & Flexplates

Purpose and function in the drivetrain

The presented Mercedes W176 C117 X156 Flywheel Starter Motor Ring Gear Sprocket is responsible for storing the rotational energy of the crankshaft and correctly transferring torque to the transmission. The integrated ring gear works with the starter pinion, enabling secure engagement during engine startup and reducing the risk of slippage or noisy operation.

Thanks to the factory OEM design, the correct working diameter, tooth profile, and balance are maintained, which is crucial for both the durability of the starter motor and the reduction of torsional vibrations throughout the entire drivetrain.

Advantages of using an original Mercedes flywheel

Choosing an original flywheel for Mercedes W176, C117, and X156 models allows you to maintain engine performance parameters in accordance with the manufacturer's specifications. Key benefits include:

• factory fitment for the crankshaft-piston system and clutch,
• proper interaction with the starter motor due to the correct ring gear profile,
• preserved inertia characteristics, affecting acceleration smoothness and idle stability,
• reduced risk of improper installation compared to generic aftermarket replacements.

This used OEM part is a good solution when the existing flywheel shows signs of excessive tooth wear, overheating of the working surface, or mechanical damage following a clutch failure.

Condition, verification, and preparation for installation

The component comes from disassembly and has the status of a used original part. Before being offered for sale, this type of component is standardly verified for ring gear wear, potential cracks, and excessive signs of overheating on the working surface. As a result, the user receives a part suitable for further operation without the need for additional modifications.

The Mercedes W176 C117 X156 Flywheel Starter Motor Ring Gear Sprocket is intended for installation in place of the factory element, following the vehicle manufacturer's service procedures (bolt tightening torques, tightening sequence, and inspection of mating clutch and starter components).

Support in choosing a used OEM part

When selecting a flywheel for a specific engine and transmission version, it is worth paying attention to compliance with the vehicle's service documentation and the manufacturer's markings. If you have any doubts regarding the choice between a used part and a replacement, a practical guide describing the differences between these solutions may be helpful – you can find it in the article 5 reasons why a used OEM part is a better choice than a replacement.

Drivetrain expansion in your Mercedes

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, starter ring gears, or mating gears, check out the available parts in the Mercedes Flywheels and Gears category.

Summary

Mercedes W176 C117 X156 Flywheel Starter Motor Ring Gear Sprocket is a used OEM part from the Flywheels and Gears group, ensuring factory fitment for the powertrain and starter motor. It is a sensible choice for users who expect to maintain the performance parameters intended by the manufacturer while optimizing the costs of drivetrain repair.