Mercedes W221 Brake Caliper Rear Right O/S Wheel Brake Unit S-Class A2214230481

Mercedes W221 Brake Caliper Rear Right O/S Wheel Brake Unit S-Class is an original braking system component from the Brake calipers and brackets group, designed for installation on the rear right axle of the vehicle. This solution is dedicated to users who expect stable brake performance, the maintenance of factory parameters, and a secure fit to the suspension and hub design of the Mercedes S-Class W221 generation. By using an original caliper, it is possible to maintain predictable vehicle behavior during braking across the full range of loads.

Specifications and technical data

• SKU: A2214230481
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2214230481
• Substitutable numbers: A2214230481, A 221 423 04 81, BG
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented caliper is designed to operate on the rear right side of the vehicle, where it is responsible for evenly pressing the pads against the disc and stabilizing braking force on the rear axle. A correctly selected caliper in this position is crucial for:

• maintaining the proper balance of braking force between the front and rear,
• ensuring a linear brake pedal response,
• reducing overheating of the disc and pads,
• maintaining the effectiveness of assistance systems such as ABS or ESP.

The original design dedicated to the Mercedes W221 allows for seamless cooperation with factory discs, pads, and brake lines, which translates into predictable vehicle behavior in daily operation.

Benefits of using an original Mercedes caliper

Using a caliper from the vehicle manufacturer Mercedes provides a number of practical technical benefits:

• factory mounting geometry – secure seating on the steering knuckle and correct pad guidance,
• compliance with the operating parameters of the W221 braking system,
• maintenance of the braking characteristics designed by the manufacturer,
• easier diagnostics and service compared to replacements of uncertain origin.

For users who value the consistency of the entire braking system, it is important that such a component allows for maintaining a configuration consistent with the assumptions of Mercedes engineers, which is significant for both comfort and driving safety.

Characteristics of the used component

The offered brake caliper is a used component, which represents a reasonable compromise between repair costs and maintaining original build quality. Such components are often chosen by conscious users who:

• are looking for original solutions at a more attractive price than new parts,
• want to maintain the consistency of the braking system with the factory specification,
• prefer reusing proven components instead of cheap replacements.

To better understand how to safely use such solutions and how to optimize service costs, it is worth reading an article describing the practical aspects of selecting and operating refurbished and used braking system components: Brake calipers under the microscope – how to reduce repair costs by choosing proven recycled parts.

Selection, installation, and application in the Mercedes W221

When selecting the Mercedes W221 Brake Caliper Rear Right O/S Wheel Brake Unit S-Class, one should pay attention to compatibility with the body version and the braking system configuration of the specific vehicle. Correct placement on the vehicle is key – the component is intended exclusively for the rear right side, which determines the direction of the mechanism's operation, the position of the bleeder screw, and the brake line connection.

During installation, it is recommended to:

• check the condition of the brake discs and pads,
• verify the flexible and rigid brake lines,
• bleed the entire system after completing the work,
• check the tightness of connections under operating pressure.

Such an approach allows for restoring the full efficiency of the rear braking axle in a single service operation and reduces the risk of needing to intervene again in the short term.

Braking system expansion and related parts

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 calipers, brackets, or guide holders, check the available parts in the Mercedes brake calipers and brackets category.