Hie every1 here pliz help me here i hava a problem with my w203 c240 v6 i bought second hand engine from some1 and installed it on my car connected everything but when i try to start it does hv a sound tht it want to start but doesnt rev or idle it shutts off immidiately after it tries to rev i can turn off the key then turn it on for the second time it does the same thing and when i turn it off and on for the third time nothing happens it wont crank at all wht could be the problem thnks to those who a willing to help and happy new year to every1 here thnks