220D is getting pretty far over the hill. I think parts will be a lot easier to find and probably cheaper on the 300D. Most 220D's out there are pretty much run into the ground.
2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg
And remember folks, Only You Can Prevent Hilliary.