Arnott C-2278 Air Spring to Coil Spring Conversion Kit - Front and Rear

Mercedes-Benz Air Suspension Conversion Kit

Arnott C-2278 converts the factory air suspension on select Mercedes-Benz E-Class Sedan and CLS models to a coil spring setup with custom shock absorbers and an Electronic Bypass Module. It is built for drivers who want to replace failing AIRMATIC components with a more straightforward suspension solution for daily use.

Arnott’s NEW product line focuses on application-specific suspension replacements engineered for direct vehicle fitment and consistent ride quality. This kit is designed for the Mercedes-Benz E-Class Sedan platform and does not fit the E-Class Wagon.

Key Features

• Air spring to coil spring conversion kit for Mercedes-Benz sedans
• Custom shock absorbers matched to the conversion design
• CNC-machined aluminum spring seats
• Powder-coated steel coil springs
• Pre-assembled components for easier installation
• Patents pending Electronic Bypass Module (EBM) to disable AIRMATIC dash error lights
• Engineered in the USA

Detailed Description

Arnott C-2278 is a complete suspension conversion solution for Mercedes-Benz CLS350, CLS500, CLS550, CLS63 AMG, E280, E320, E350, E500, E550, E63 AMG, CLS55 AMG, and E55 AMG sedan applications listed below. It replaces the air suspension system with coil springs and custom dampers while using the included EBM to prevent warning messages associated with the original air system. The result is a simpler suspension layout for owners of Mercedes-Benz E-Class Sedan models who want to move away from recurring air suspension service.

This part number, C-2278, is built around steel compression springs with a standard replacement suspension grade and black spring finish. It is a direct-fit conversion for front and rear suspension positions on the covered sedan applications.

What It Helps Address

• Air suspension compressor or air spring failures
• Dash warning lights caused by AIRMATIC faults
• Repeated repair cycles on aging air suspension components
• Uneven ride height from leaking suspension parts
• Costly replacement of individual air struts

Installation Notes and Tips

Install C-2278 on the exact Mercedes-Benz sedan applications listed in the fitment table. This kit is for front and rear suspension conversion on sedans only and does not fit the E-Class Wagon. Verify the vehicle’s original suspension configuration before installation, and follow the included module and hardware instructions during setup.

• Fits 2007-2011 Mercedes-Benz CLS350, front and rear
• Fits 2005-2011 Mercedes-Benz CLS500, front and rear
• Fits 2007-2011 Mercedes-Benz CLS550, front and rear
• Fits 2007-2011 Mercedes-Benz CLS63 AMG, front and rear
• Fits 2007-2009 Mercedes-Benz E280, front and rear
• Fits 2003-2009 Mercedes-Benz E320, front and rear
• Fits 2006-2009 Mercedes-Benz E350, front and rear
• Fits 2003-2009 Mercedes-Benz E500, front and rear
• Fits 2007-2009 Mercedes-Benz E550, front and rear
• Fits 2007-2009 Mercedes-Benz E63 AMG, front and rear
• Fits 2006 Mercedes-Benz CLS55 AMG, front and rear
• Fits 2003-2006 Mercedes-Benz E55 AMG, front and rear

Quality Assurance

Arnott designs this conversion kit as a vehicle-specific aftermarket solution for Mercedes-Benz suspension service. Part number C-2278 is engineered to replace the air suspension system with a coil spring setup while maintaining proper electronic function through the bypass module.

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