That's pretty damn good for a 2L diesel! Do you have any videos of it?Factory tune- 2.1L twin turbo diesel. 0-100 isn't that fast at 7.1secs (relative to Evo's sub 5).
I dynod' it not too long ago. Posted it up on BoS somewhere but just google "C250 CDI dyno" in Google Images. Mine is the 2nd and 3rd result with Advan Tuning on the dyno chart.