MB does seem to be on a roll. Back when the C class came out, some editors at EVO took part in a tire test by Hankook or Continental and they had C350s. Without the stability control and ABS, the cars were reputed to handle a bit like the old E30 M3s. No faint praise that.
Also, if the E63 is anything to go by, the base E class should be pretty accomplished in the body control department.
Was it the 7 speed in the E350?