Unity 15-521002 Air Suspension Spring - Rear Right

Rear Right Air Suspension Spring for Mercedes-Benz

Unity 15-521002 is a rear right air suspension spring built for select Mercedes-Benz models with factory air suspension. It is engineered to match OEM specifications for proper ride height, load support, and suspension response on the applications listed below.

• Compatible with 2015-2020 Mercedes-Benz C300, rear right, 4MATIC models only
• Compatible with 2017-2020 Mercedes-Benz C43 AMG, rear right, 4MATIC models only
• Compatible with 2015-2020 Mercedes-Benz C63 AMG, rear right
• Compatible with 2016 Mercedes-Benz C450 AMG, rear right, 4MATIC models only
• Compatible with 2015 Mercedes-Benz C400, rear right, 4MATIC models only

Key Features

• Air suspension spring for the rear right position
• OE-specification construction for direct replacement use
• Built by Unity Automotive, a suspension-focused aftermarket manufacturer with decades of experience
• Part number 15-521002 for accurate ordering and fitment verification
• Fits select Mercedes-Benz C-Class and AMG applications with factory air suspension

Product Details

Unity Automotive develops aftermarket suspension components to meet OEM-style requirements for fit and function. The 15-521002 air suspension spring is intended for Mercedes-Benz vehicles that use a rear right air spring assembly, including C300, C43 AMG, C63 AMG, C450 AMG, and C400 applications listed in the fitment data. This part number 15-521002 helps restore the original rear suspension support and ride characteristics on the specified models.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Part Can Address

• Rear corner sagging on the passenger side
• Uneven ride height at the rear of the vehicle
• Air spring leakage or loss of suspension pressure
• Suspension warning messages related to rear air support
• Reduced ride quality from a worn rear air spring

Installation Notes

Verify the vehicle’s model, year, drivetrain, and rear right position before installation. This air suspension spring is listed for 4MATIC models only where noted, so confirm the exact application against the fitment data before ordering. Professional installation is recommended for air suspension components, and the system should be inspected for related wear or leaks during replacement.

Quality Assurance

Unity Automotive states that its suspension components are built to OEM specifications and backed by a customer satisfaction guarantee. The brand also notes more than 40 years of aftermarket manufacturing experience and a focus on suspension product development.