Mercedes W177 W247 Brake Disc Rear Left Right Wheel N/O/S Braking Unit Disc

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W177 W247 Brake Disc Rear Left Right Wheel N/O/S Braking Unit Disc is an original braking system component designed for the rear axle, for the right or left side. This product from the Brake discs category ensures proper compatibility with the factory caliper and control system, which translates into stable, predictable braking in everyday use.

Specifications and technical data

• SKU: A2474230112
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2474230112
• Substitutable numbers: A2474230112, A 247 423 01 12
• Location on the vehicle: Rear, Right, Left
• Category: Brake Disc Rotors

Purpose and compatibility

The presented brake disc has been designed as a component of the rear braking system in Mercedes compact class vehicles, including the W177 and W247 series. The design is intended for installation on both sides of the axle – right and left – which facilitates the selection and servicing of the braking system in a workshop or during self-replacement.

By maintaining factory geometric parameters, the disc works with stock brake pads and original calipers, ensuring even pad pressure and stable heat dissipation during intensive braking.

Construction and operating characteristics

The rear brake disc in this model has been manufactured using the technology specified by the vehicle manufacturer, with an emphasis on dimensional repeatability and appropriate rigidity. Such construction reduces the risk of lateral runout and uneven wear, which is crucial for driving comfort (no vibrations on the brake pedal) and safety.

The properly selected mass and shape of the friction surface promote effective heat energy dissipation, which reduces susceptibility to overheating and loss of braking efficiency during repeated, heavy braking. The disc is adapted for operation in typical road conditions, while maintaining the safety margin required in premium brand cars.

Condition, verification, and advantages of using a used part

The item comes from the original used Mercedes parts segment, which means it retains factory specifications and fitment for the hub, caliper, and braking system accessories. Compared to low-budget replacements, the original disc ensures parameter consistency with other system components, which facilitates diagnostics and service.

Every brake disc of this type should be verified before installation for working thickness, potential edges, surface corrosion of the friction area, and radial runout. A properly selected and checked used component allows for optimizing repair costs while maintaining a high level of safety and predictable vehicle behavior during braking.

If you want to analyze in detail what to look for when buying used braking system components, check out our guide: Second-hand braking system: how to safely select discs, calipers, and ABS?

Benefits of using an original Mercedes brake disc

• Factory fitment to the hub and caliper, with no modifications required.
• Parameter consistency with the vehicle's stock braking system.
• Predictable behavior during braking on wet and dry surfaces.
• Can be used on the right or left side of the rear axle, which simplifies parts logistics.

Choosing an original brake disc from the premium segment is particularly beneficial when you want to maintain the braking characteristics intended by the vehicle manufacturer, without experimenting with uncertain replacements.

Expanding the braking system in your Mercedes

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other elements from the same group, such as additional discs, pads, or brake lines, check out the available parts in the Mercedes brake discs category.

For a broader perspective on the cost-effectiveness of using used components in premium cars, it is also worth reading our market analysis: why used original parts for premium brands are becoming an increasingly popular choice.