If you have Airmatic button then you don't have ABC.

ABC car has two buttons both has 'ABC' on it. One is for changing suspension mode, one is for adjusting suspension height.

 

additionally, the ABC is a hydraulic system...... the Airmatic system is of course air(pnuematic).

the abc is a very nice high performance system, but the airmatic is no slouch.

 

You can check the W220 S-Class Encyclopedia in the stickies for information on Airmatic and ABC; the information will generally apply. http://www.benzworld.org/forums/w220-s-class/1508080-w220-s-class-encyclopedia-start-here.html For the future, if you are inquiring about a W220 and not some other model, it would be helpful to know that.