Arnott C-3271 Air Spring to Coil Spring Conversion Kit - Front and Rear

Mercedes-Benz S-Class Air Suspension Conversion

Arnott C-3271 is a premium air spring to coil spring conversion kit for the 2007-2013 Mercedes-Benz S-Class W221 with AIRMATIC and ADS, and without 4MATIC. It replaces the air suspension setup with a passive steel-spring arrangement while preserving the comfort and handling expected from a luxury sedan.

Built around Eibach front and rear monotube sport shock absorbers custom valved for Arnott, this kit is engineered for drivers searching for a Mercedes-Benz S550 air suspension conversion kit, S63 AMG coil spring conversion, or a complete S-Class suspension conversion solution. The Arnott C-3271 also includes a patented Electronic Bypass Module to disable the AIRMATIC system and prevent dash warning lights.

Key Features

• Air spring to coil spring conversion kit for Mercedes-Benz S-Class W221 models
• Fits front and rear suspension positions
• Steel springs made by Eibach in Germany
• Premium Eibach monotube sport shock absorbers custom valved for Arnott
• Patented Electronic Bypass Module (U.S. Pat. No. 9,329,917) to disarm the AIRMATIC system
• Passive suspension design with standard replacement grade construction
• Black steel spring finish

Detailed Description

Arnott C-3271 is built for the 2007-2013 Mercedes-Benz S-Class W221 platform equipped with AIRMATIC and ADS, excluding 4MATIC applications. The conversion replaces the factory air suspension components with steel springs and matched dampers, giving the vehicle a conventional suspension layout while maintaining a refined ride profile. The Eibach-supplied springs and Arnott-specific shock tuning are selected to support the chassis balance of the S-Class, including long-wheelbase luxury sedans and AMG variants listed in the fitment data.

This part number, C-3271, is a direct-fit suspension conversion solution for owners looking to eliminate air suspension faults and restore predictable ride behavior on a Mercedes-Benz S350, S400, S500, S550, S600, S63 AMG, or S65 AMG within the confirmed fitment range. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Solve

• Air suspension failure on W221 S-Class vehicles
• Dash panel warning lights related to the AIRMATIC system
• Uneven ride height caused by leaking air springs
• Loss of damping control from worn factory air suspension components
• Need for a passive coil spring conversion on an AIRMATIC-equipped Mercedes-Benz S-Class

Installation Notes and Tips

Fits 2007-2013 Mercedes-Benz S550, front and rear. Fits 2007-2013 Mercedes-Benz S600, front and rear. Fits 2008-2013 Mercedes-Benz S63 AMG, front and rear. Fits 2007-2013 Mercedes-Benz S65 AMG, front and rear. Fits 2011-2013 Mercedes-Benz S350, front and rear. Fits 2010-2013 Mercedes-Benz S400, front and rear. Fits 2007-2011 Mercedes-Benz S500, front and rear. Fits 2013 Mercedes-Benz S500, front and rear.

Confirm the vehicle is equipped with AIRMATIC and ADS and does not have 4MATIC before ordering. The Electronic Bypass Module is included to disable the air suspension warning system after conversion. Professional installation is recommended for suspension work on the Mercedes-Benz S-Class.

Quality Assurance

Arnott designs this conversion kit as a standard replacement suspension solution using Eibach-engineered components and a patented bypass module for system fault elimination. The C-3271 is built for the specific chassis and equipment requirements of the W221 S-Class platform.