Unity 30-512900 Air Spring to Coil Spring Conversion Kit - Rear

Rear Suspension Conversion for Mercedes-Benz SUVs

Restore a conventional rear suspension setup with the Unity 30-512900 Electronic to Passive Air Spring to Coil Spring Conversion Kit. This rear conversion kit is built for Mercedes-Benz GLS, GLE, GL, and ML applications where the original air or electronic suspension is being replaced with standard coil springs.

Designed around rear-position fitment, Unity 30-512900 supports a direct suspension changeover for Mercedes-Benz GLS450, GLE350, GL550, and ML350 models across the listed years. It is a practical solution for drivers looking to move away from electronic air suspension components and return the vehicle to a standard spring setup.

Key Features

• Rear air spring to coil spring conversion kit
• Fits Mercedes-Benz GLS, GLE, GL, and ML rear suspension applications
• Built to OEM specifications for application-specific fitment
• From Unity’s Electronic to Passive Air Spring to Coil Spring Conversion Kit line
• Part number 30-512900 for easy identification

Detailed Description

Unity Automotive has more than 40 years of aftermarket suspension manufacturing experience, and the 30-512900 kit reflects that focus on application-specific suspension replacement. This product line is intended for vehicles originally equipped with air or electronic rear suspension and provides a standard coil spring conversion for the rear axle. It is a fitment-based solution for Mercedes-Benz GLS450, GLS550, GLS63 AMG, GLE350, GLE63 AMG, GL450, GL550, ML350, and related models listed below.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Use part number 30-512900 when verifying the correct rear conversion kit for your vehicle.

What This Product Helps Address

• Rear air suspension failure on Mercedes-Benz GLS, GLE, GL, and ML models
• Electronic suspension faults that trigger ride-height or suspension warnings
• Leaking or aging rear air springs
• Costly maintenance tied to air suspension components
• Need to convert the rear suspension to a standard coil spring setup

Installation Notes and Tips

• Fits 2017-2019 Mercedes-Benz GLS450, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2019 Mercedes-Benz GLS500, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2017-2019 Mercedes-Benz GLS550, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2017-2019 Mercedes-Benz GLS63 AMG, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016-2018 Mercedes-Benz GLE350, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2017-2018 Mercedes-Benz GLE43 AMG, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016-2018 Mercedes-Benz GLE550e, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016-2018 Mercedes-Benz GLE63 AMG, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016-2018 Mercedes-Benz GLE63 AMG S, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016-2017 Mercedes-Benz GLE400, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016-2017 Mercedes-Benz GLE450 AMG, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016-2017 Mercedes-Benz GLE500, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016-2017 Mercedes-Benz GLE550, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2010-2016 Mercedes-Benz GL350, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2007-2016 Mercedes-Benz GL450, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2008-2016 Mercedes-Benz GL550, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2013-2016 Mercedes-Benz GL63 AMG, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016 Mercedes-Benz GLE300d, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2016 Mercedes-Benz GLE350d, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2008-2015 Mercedes-Benz GL500, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2015 Mercedes-Benz ML250, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2005-2015 Mercedes-Benz ML350, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2015 Mercedes-Benz ML400, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2005-2015 Mercedes-Benz ML500, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2008-2015 Mercedes-Benz ML550, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2007-2015 Mercedes-Benz ML63 AMG, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2010-2011 Mercedes-Benz ML450, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2007-2009 Mercedes-Benz GL320, rear; includes notes for converting air/electronic suspension to standard suspension.
• Fits 2007-2009 Mercedes-Benz ML320, rear; includes notes for converting air/electronic suspension to standard suspension.

Quality Assurance

Unity Automotive builds suspension components to OEM specifications and focuses on application-specific fitment for Mercedes-Benz rear suspension conversions. The brand’s long-standing aftermarket suspension experience supports consistent part selection for vehicles that need a standard coil spring replacement path.