Mercedes W221 Rear Right O/S Wheel Brake Caliper A2214230281

The Mercedes W221 Rear Right Brake Caliper is a component from the Brake Calipers and Brackets category, designed for the rear right axle of the vehicle. It is responsible for stable pad guidance relative to the disc, even distribution of braking force, and proper cooperation with the hydraulic system. A used, original caliper helps maintain factory braking characteristics and compatibility with the Mercedes S-Class W221 drivetrain.

Specifications and technical data

• SKU: A2214230281
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2214230281
• Substitutable numbers: A2214230281, A 221 423 02 81
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Intended Use and Vehicle Placement

The presented caliper is dedicated for installation on the rear right side of the vehicle, which is important for both suspension geometry and brake line routing. The design is optimized for cooperation with the rear axle of the Mercedes W221, ensuring correct positioning relative to the disc and proper operation of the pad guiding mechanism.

The vehicle placement has been factory-determined, so the caliper should be used precisely in its intended position. This helps avoid installation problems, incorrect pad wear, or uneven distribution of braking force between the vehicle's sides.

Technical Characteristics of the Caliper

The brake caliper from this series was designed by Mercedes as a safety system component with stable operating parameters. The body provides adequate rigidity, and the pad guides and seats are prepared for cooperation with the rear axle's hydraulic system. This allows for repeatable braking force under various vehicle loads.

The element belongs to the Brake Calipers and Brackets category, meaning it is responsible not only for generating clamping force but also for precise pad guidance relative to the disc. The correct caliper geometry reduces the risk of overheating, squealing, and uneven wear of the friction linings.

Benefits of Using a Used Original Caliper

Choosing a used, original caliper for the Mercedes W221 allows for consistency with the factory brake system design. This solution is often chosen by users who value:

• maintaining factory braking characteristics and compatibility with other system components,
• secure fitment to mountings, disc, and brake lines,
• a favorable cost-to-quality ratio compared to aftermarket alternatives of unknown origin.

Before installation, a standard inspection of the component in a workshop is recommended – verification of seals, condition of guides, piston, and mounting points. A properly prepared caliper can work seamlessly with new pads and discs, ensuring stable braking performance in everyday use.

Selection and Installation in the Braking System

To ensure proper system operation, the caliper should be selected according to the manufacturer's markings and vehicle placement. In practice, this means it must be matched to the specific version of the Mercedes W221 and the correct mounting side must be maintained. Professional installation includes bleeding the system, checking the condition of flexible and rigid brake lines, and verifying piston operation after reassembly.

If you want to deepen your knowledge on safely selecting used brake system components, it is worth consulting a guide that describes the key stages of verifying such components – the article Used Braking System: How to Safely Choose Discs, Calipers, and ABS? discusses them in detail.

Related Products and Additional Information

If you are assembling the rear braking system for your Mercedes S-Class and are also interested in other mounting or cooperating elements for calipers in the same product group, check the available parts in the Mercedes Brake Calipers and Brackets category.

For those planning a broader modernization or service of their vehicle using original used parts, a practical guide to the most frequently chosen components might also be useful – you can find it in the article Best Used Car Parts – A Guide to the Most Frequently Chosen Original Parts.