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On a 2001 SClass, is the ABC in additon to or in place of Airmatic? and how are the struts different?
Thanks!
D
 

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ABC replaces Airmatic. ABC is hydraulic, Airmatic is pneumatic. ABC uses a computer to overcome nosedive while braking, and other body motions, where Airmatic's body control system is not as extensive.
 

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Is the ABC system more reliable than AIRMATIC and when was this ABC system offered or was it always an extra cost option?
It has always been an option on ALL S500 and S430's. It has been standard on the S55 and S600 at least since the facelift. ( 2003-2006 ). PRe 2003, I wouldn't call either of them reliable that would just be overstating a bit.
 
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