Unity 28-514001 Air Suspension Strut - Rear Left

Electronic Air Suspension Strut for Mercedes-Benz S-Class

Restore rear suspension control with the Unity Electronic Air Suspension Strut Assembly, part number 28-514001. This rear left air suspension strut is built for select Mercedes-Benz S-Class and Maybach models with electronic air suspension, including applications with or without 4Matic.

Unity Automotive draws on more than 40 years in the aftermarket and builds suspension components to OEM specifications for direct-fit replacement needs. The 28-514001 is a fitment-based solution for drivers addressing ride-height, damping, or air suspension performance concerns on the rear left corner.

Key Features

• Electronic air suspension strut assembly for the rear left position
• Built to OEM specifications for select Mercedes-Benz luxury sedans
• Fits applications with or without 4Matic, where listed
• Excludes vehicles equipped with Active Body Control (ABC Suspension)
• Unity part number 28-514001 for easy identification
• Fits Mercedes-Benz S-Class and Maybach S-Class models from 2014-2020, depending on model

Detailed Description

The Unity 28-514001 electronic air suspension strut assembly is a direct replacement for the rear left suspension position on select Mercedes-Benz S450, S560, S600, S65 AMG, S550, S63 AMG, and related Maybach S-Class models. It is engineered for vehicles using electronic air suspension and is listed for rear left fitment across multiple S-Class chassis applications, including Mercedes-Benz Maybach S560 and Maybach S650.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Use this air suspension strut when replacing a worn or leaking rear left unit on a Mercedes-Benz S-Class or Maybach S-Class equipped with electronic air suspension and not ABC suspension.

What It Helps Fix

• Rear-left corner sagging or uneven ride height
• Air suspension leaks that affect vehicle stance
• Excessive bouncing, harshness, or reduced damping control
• Suspension warning lights related to rear air strut performance
• Ride quality loss on Mercedes-Benz S-Class and Maybach models

Installation Notes and Tips

Confirm the vehicle is equipped with electronic air suspension and not Active Body Control (ABC Suspension) before ordering. Verify rear left placement and match the model year exactly to the fitment list, since coverage varies by trim and chassis. Professional installation is recommended for luxury air suspension systems, and the vehicle should be inspected for related compressor, line, or sensor issues during replacement.

Quality Assurance

Unity Automotive has over four decades of aftermarket suspension manufacturing experience and supplies parts built to OEM specifications. The brand focuses on consistent fitment, durable construction, and customer satisfaction across its suspension product line.