Arnott C-3550 Air Spring to Coil Spring Conversion Kit - Front and Rear

Arnott C-3550 Coil Spring Conversion Kit

Arnott C-3550 converts the factory air-assisted suspension on select Mercedes-Benz CLS-Class and E-Class models to a coil spring setup. It is built for front and rear use and includes model-specific shock absorbers, coil springs, and rubber upper and lower spring isolators for a direct suspension changeover.

Key Features

• Air spring to coil spring conversion kit for Mercedes-Benz air suspension applications
• Model-specific shock absorbers and coil springs for ride-quality matching
• Steel compression springs with black finish
• Passive suspension design
• Rubber upper and lower spring isolators included
• Standard replacement grade for OE-style service

Detailed Description

The Arnott C-3550 is a suspension conversion solution for drivers replacing factory air-assisted components with a conventional coil spring system. This kit is engineered for the 2012-2019 Mercedes-Benz CLS-Class (W218) and select Mercedes-Benz E-Class models with air suspension, including CLS550, CLS63 AMG S, CLS400, E250, E300, E350, E400, E550, E63 AMG S, E63 AMG, and CLS63 AMG applications. Arnott C-3550 is a practical choice when servicing a Mercedes-Benz CLS-Class or E-Class air suspension system and moving to a passive coil spring arrangement.

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

What It Helps Address

• Air suspension component failure on Mercedes-Benz CLS-Class and E-Class vehicles
• Uneven ride height caused by worn air-assisted suspension parts
• Compressor and air spring service concerns tied to aging factory air systems
• Ride quality issues from leaking or deteriorated suspension components
• Need for a conventional coil spring conversion on front and rear suspension

Installation Notes and Tips

Install on the front and rear suspension positions only on the listed applications. Verify vehicle year, model, and whether the car is equipped with air suspension before ordering. Follow factory service procedures for suspension disassembly, torque specifications, and alignment checks after installation. Because this is a passive conversion kit, it replaces the air-assisted setup with coil spring components rather than retaining the original air system.

Quality Assurance

Arnott supplies suspension components for OE-style replacement applications, and the C-3550 uses standard replacement-grade parts with vehicle-specific fitment for the listed Mercedes-Benz models.