WIS 32.00 General
Description - Suspension
W220's are available with two types of suspension;
W220 with code 487 (Active Body Control (ABC))
Active Body Control (ABC) is fitted on vehicles with option code 487 - ABC SUSPENSION (ACTIVE BODY CONTROL).
ABC (Active Body Control) was standard on all S600, S55, S63, and S65 models. You can tell which suspension you have by opening the hood of your car and examining the top of the shock absorber. If your car is equipped with ABC, you will have small black electrical plugs leading into the top of both shocks.
W220 without code 487 (AIRmatic)
If the car is equipped with Airmatic, you will have obvious air lines leading from the top of the shocks.
Front Suspension
Rear Suspension
Resources
How to change subframe bushes: http://forums.mercedesclub.org.uk/showthread.php?t=90826 and http://forums.mercedesclub.org.uk/showthread.php?t=90827 .