Unity 31-013500-4-S Air Spring to Coil Spring Conversion Kit - Front and Rear

Mercedes-Benz Air Suspension Conversion

Replace failing air strut assemblies with a pre-assembled coil spring conversion built for select 2003-2006 Mercedes-Benz S430 and S500 models with Airmatic. Unity 31-013500-4-S is a front and rear air spring to coil spring conversion kit that also includes a ride light bypass module for the converted suspension system.

Key Features

• Pre-assembled complete strut assembly conversion kit
• Converts air strut assemblies to coil spring suspension
• Includes ride light bypass module
• Fits 2003-2006 Mercedes-Benz S430, front and rear
• Fits 2003-2006 Mercedes-Benz S500, front and rear
• For vehicles with Airmatic
• Excludes RWD applications
• Unity part number 31-013500-4-S

Detailed Description

This Unity conversion kit is built for Mercedes-Benz S430 and Mercedes-Benz S500 vehicles equipped with Airmatic suspension and configured for front and rear use. It replaces the original air strut assemblies with a coil spring setup, providing a direct suspension conversion path for the listed applications. The Unity 31-013500-4-S part number is useful when matching the correct conversion kit for 2003-2006 Mercedes-Benz S430 and S500 models.

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

Common Issues This Part Can Address

• Air strut failure on Airmatic-equipped suspension
• Vehicle sitting low from leaking air suspension components
• Warning lights related to the air suspension system
• Uneven ride height at the front or rear
• Repeated compressor cycling caused by air system leaks

Installation Notes and Tips

Verify vehicle configuration before ordering: this kit fits 2003-2006 Mercedes-Benz S430 and S500 with Airmatic and excludes RWD models. Confirm front and rear application details against the original suspension layout, and follow factory service procedures for suspension conversion and electronic light bypass setup. The Unity 31-013500-4-S kit is intended for the listed fitments only.

Quality Assurance

Unity supplies this pre-assembled complete strut assembly conversion kit as a direct-fit replacement solution for the specified Mercedes-Benz applications. The included bypass module supports proper system operation after the air-to-coil conversion.