Originally Posted by super SEC

Wait until you have owned or personally driven it for 100,000 miles. I guarantee you will not think it is dependable. Time and mileage is the achillies heel of the hydrulic components. Blow a hose or get contamination in the system and it is all down hill from there.

Concerning the ABC, what exactly do you mean when well maintained? There is no set "maintenance" perscribed by MB on the ABC system.

See page 56 & 57 for the ABC maintenance schedule on the 2006 CL600. Nothing, nada, zip....
http://www.mbusa.com/vcm/MB/DigitalAssets/pdfmb/maintenancebooklets/2006_cclass_clkclass_sclass_clclass_slclass.pdf

Some change the fluid but I have no statistical evidence that it helps the ABC hoses and pump. It certainly shouldn't hurt but it is not in the manual or on any set schedule that I could find.

The ABC suspension is the only thing holding me back from getting a CL65 or SL65. Been there done that. Loved the engine. Hated the repairs on the ABC. Most long term owners who drove these cars daily share the same experiences as myself.