I have a 5 year old SL500 with ABC. As soon as the warranty ran out and I had only 16,000 miles on it, I was told by the dealer that I had to replace the 2 leaking front shocks for about $4,000. It was extra expensive because it was part of the ABC system. I have heard other horror stories about costly repairs on the ABC system. My dealer says the new 2013 SL550 does not have the ABC. Does it have some other super sophisticated, very expensive to repair, ride system?