Found a low mileage '96 C36 engine that is going into my '90 300SL, engine came with ECU and wiring harness, still have to pick up the air cleaner and MAF. With all the searching I have done, the engine should drop in and bolt up to my 5-speed, but after that I am a little lost. What else do I need to change? Fuel system? Ignition system? Also need a source for the 38 pin ODBII plug. Any help is appreciated, TIA.