wow, what country are you from? Ihave no idea what b18c4 is, or an mb6
if it's anything like the USDm b18c engines then it should plug right into your car if you have the engine wiring for the b18c4.
You will have to get an ecu to run the b18c4 engine, and you will have to wire in VTEC and a knock sensor. (and IaB if equipped)
Read the 3rd post on this page for the Pinouts for wiring vtec and knock sensor (and IaB)
Good luck