I was in a C55 in germany, what a great little car. It is so sporty. In the US, it would be very difficult to find a C43, and an E55 engine and put it together. The engine conversion I think would be about 20k USD. Donnie from here on mercedesshop, the owner, can do a kleemann kompressor and get about 500 hpr. Even with 450 I think the 1/4 mile would be in the low 12s, and 0-60 in 4 or so.

Stiffer lowering springs on a c43 would be a great way to make it handle better. Maybe renntech makes a sway bar or something. I know someone has been asking the about the C w202 sway bars for a long time now. Im not sure the verdict.

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Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.