Now this was pretty unexpected. I'm guessing that the S55 and CL55 will continue on. Now we have a AMG tuned V-8 and AMG tuned V-12 in the lineup. A couple of months ago, Car and Driver tested a S600. It went from 0-60 in 5.3 seconds. That's really fast for an S-class. The S55 is even faster, and the S63 will be faster than the S55 (0-60 5.7? Probably an estimate, it will do better). Its amazing what MB has done with the S-class. It is truly one of the best cars ever made.