Unity 28-513400 Air Suspension Strut - Rear

Rear Electronic Air Suspension Strut for Mercedes-Benz

Restore rear ride control with the Unity Electronic Air Suspension Strut, part number 28-513400. This rear air suspension strut is built for Mercedes-Benz S-Class applications with Airmatic and W220 chassis fitment, including select S350, S430, S500, S55 AMG, S600, and S65 AMG models.

Unity Automotive draws on more than 40 years in the aftermarket suspension market and builds this Electronic Air Suspension Strut line to OEM specifications for direct-fit replacement needs.

Key Features

• Rear electronic air suspension strut for Mercedes-Benz applications
• Designed for vehicles equipped with Airmatic
• Built for W220 chassis fitment
• OE-style assembly for suspension replacement service
• Unity part number 28-513400
• Cross-references Monroe Shocks & Struts 4J2013SK for the same application

Fitment Details

• Fits 2006 Mercedes-Benz S350, rear, w/ Airmatic; For W220 Chassis; Electronic Air Suspension Strut
• Fits 2000-2006 Mercedes-Benz S430, rear, w/ Airmatic; For W220 Chassis; Electronic Air Suspension Strut
• Fits 2000-2006 Mercedes-Benz S500, rear, w/ Airmatic; For W220 Chassis; Electronic Air Suspension Strut
• Fits 2001-2006 Mercedes-Benz S55 AMG, rear, w/ Airmatic; For W220 Chassis; Electronic Air Suspension Strut
• Fits 2001-2006 Mercedes-Benz S600, rear, w/ Airmatic; For W220 Chassis; Electronic Air Suspension Strut
• Fits 2005-2006 Mercedes-Benz S65 AMG, rear, w/ Airmatic; For W220 Chassis; Electronic Air Suspension Strut

What It Helps Address

• Rear suspension sag on Airmatic-equipped Mercedes-Benz S-Class vehicles
• Uneven ride height at the rear of the vehicle
• Loss of damping control from a worn air suspension strut
• Ride quality issues caused by aging W220 chassis suspension components
• Suspension warning concerns related to rear air strut wear

Installation Notes and Tips

Verify Airmatic equipment and W220 chassis fitment before installation. Confirm the rear position and match the vehicle application to the listed year, make, and model before ordering. Professional installation is recommended for air suspension service because the system must be handled and calibrated correctly after replacement.

Quality Assurance

Unity Automotive manufactures aftermarket suspension parts to OEM specifications and supports this product with its customer satisfaction commitment. The brand focuses on suspension components engineered for consistent fit and dependable service in Mercedes-Benz applications.