As above! That is the cheapest way to serious speed in a Mercedes. V-8 juice, Mustang GT 0-60 times, and MErcedes comfort in the W124 chassis which runs circles around the W126 for handling. And the W124 has vault-like constrution and is durned safe too.
That's the way to do it, at a fraction of the cost of adding go-fast goodies to a 560SEL...
1998 C230 "Black Betty"