+3, I have an 02 CL55, it is lots of FUN
However I'm not sure the average punter would notice much difference between a non K 55 and a 500. (and I class myself in this category)
Could this relative loss of balance mean something other than in extreme conditions or use? I am not a boy racer! (any more at least!)
A hard question, nose heavy cars were a disaster in the past
Performance wise the 500 does the 0-62 in 6.3 sec, the 55 in 4.8 and the 600 in 4.8 as well
Fuel wise the 500 is 24.8,55=21.4 and 600 =19.2
I think these figures are for the post 2003 models. If I follow your drift it would make more sense to go for a later 500 which performs just as well as an earlier 600 or 55?