How can I tell if my Mercedes S-Class is equipped with AIRMATIC® or ABC?
AIRMATIC® is a Mercedes trademark for air suspension. ABC stands for Active Body Control. ABC was a rare option on all S-Class models. ABC, however, was standard on all S-600, S-55, S-63, and S-65 models. You can tell which suspension you have by opening the hood of your car and examining the top of the shock absorber.
If the car is equipped with AIRMATIC, you will have obvious air lines leading from the top of the shocks.

If your car is equipped with ABC, you will have small black electrical plugs leading into the top of both shocks.

Arnott LLC® offers a Limited Lifetime Warranty for United States and Canada on Arnott branded Air Springs, Air Struts, Compressors, Coil Spring Conversion Kits and Arnott branded Adjustable Motorcycle Suspension Kits. Orders for Arnott branded products outside of the United States and Canada (i.e., the European Union, Mexico, and the rest of the world) come with a Limited Two-Year Warranty. Arnott offers a 30-Day Money Back Guarantee and a 90-Day Return Policy on unused and uninstalled products. Arnott offers a 30-Day Warranty on parts used in commercial vehicles. Improper use or installation is not a manufacturer's defect and is not covered by the warranty. The Arnott Warranty is non-transferable.
For complete Warranty details and limitations, please click here.