Interesting. I have no interest in the 400 with my 500i. Assumed because of the 00 (and I assumed there was an i after it to be honest) number it would be injected....poor assumption on my part.@EchoRomeoCharlie The Stihl MS400 is a M-Tronic with carb. Only the 500i is fuel injected for now. Perhaps in the future fuel injection will make it to other CC classes.