Awesome Service - See Our Ratings. Air Springs to Coil Spring Conversion Kit. Set of 4 new spring and shock air conversion kit including all necessary hardware to convert your air ride suspension to coil system. Powder coated setup will never rust. Bolt on system with no modifications required, includes installation instructions.Includes direct plug in (no cutting/splicing wires like most kits) error light disable modules included. The item "Airmatic to Coil Spring Suspension Conversion Kit S-Class W220" is in sale since Tuesday, July 2, 2013. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Suspension & Steering\Coil Springs". The seller is "active_distribution" and is located in Chapel Hill, North Carolina. This item can be shipped worldwide.