Of the dyno results that have been posted at mbworld.org the stock coupes run from the mid-150's to a high of 168 hp at the rear wheels. The car with 168 got exactly what Kleemann claims. 30 more hp and 38 ft-lbs more torque, if I remember correctly.
You can search the C-class forum at ww. mbworld.org
You can search the C-class forum at ww. mbworld.org