Brake Caliper Mercedes W205 Rear Left N/S Wheel Braking Unit A2054230300

Mercedes W205 Rear Left Brake Caliper A2054230300 is an original part from the Brake Calipers and Brackets group, designed for installation on the rear left axle of Mercedes W205 vehicles. A used caliper provides a functional service solution for drivers who want to restore proper brake system operation while maintaining factory performance characteristics.

Specifications and technical data

• SKU: A2054230300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2054230300
• Substitutable numbers: A2054230300, A 205 423 03 00
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Intended Use and Function in the Braking System

The presented brake caliper is designed to operate on the rear left side of the vehicle, which is crucial for the correct distribution of braking forces in the Mercedes W205. It is responsible for precisely pressing the pads against the disc, stabilizing braking effectiveness in everyday use and in emergency situations.

Selecting the correct caliper for a specific axle and side of the vehicle minimizes the risk of uneven pad wear, braking vibrations, and improper operation of assistance systems such as electronic stability control or brake force distribution.

Benefits of Using an Original Mercedes Caliper

Using an original brake caliper dedicated to the W205 allows for the preservation of the system's factory operating parameters. The most important benefits include:

• maintaining the correct mounting geometry relative to the hub and brake disc,
• proper fit with standard brake lines and brackets,
• consistency with the factory braking force characteristics on the rear axle,
• reduced risk of bleeding and piston operation issues.

For the user, this translates to stable, predictable braking and easier future diagnostics, as operating parameters remain consistent with the manufacturer's specifications.

Application in Service and Repairs

This brake caliper is suitable for both standard replacement of worn parts and for post-collision repairs where restoring full functionality of the rear axle is necessary. A used component allows for optimized service costs while maintaining a design consistent with the original Mercedes project.

In workshop practice, correct part matching to the specific model and equipment version is particularly important. Manufacturer markings and the ability to verify part numbers in service systems are helpful here, making it easier for mechanics and customers to make informed choices.

Selecting Used Brake System Components

When purchasing a used caliper, it is advisable to pay attention to its compatibility with the vehicle's body version and braking system, as well as its mounting on the rear left side. It is also good practice to check the condition of the guides, mounting seats, and surfaces that interact with the pads, to ensure even operation of the entire system after installation.

If you want to streamline the process of selecting used brake components and minimize the risk of errors, use the practical tips contained in the article: Second-hand braking system: how to safely choose discs, calipers, and ABS?. This is a helpful addition to your knowledge when planning repairs based on aftermarket parts.

Expanding Brake System Repairs in a Mercedes

If you are planning a comprehensive repair or upgrade of the braking area in your Mercedes and need other parts from the same group, such as additional calipers, brackets, or mounting holders, check the available parts in the category Mercedes Brake Calipers and Brackets.

Verification by manufacturer part numbers can also be helpful when selecting components, as described in detail in the guide: risk-free online parts shopping – how to check component compatibility by OEM numbers. This will make it easier to confirm the caliper's compatibility with your specific Mercedes version.