Hea Guys, I've been having issues with my 2005 E320 for some time now, I've been having a cylinder 1 misfire, I have replaced all the plugs, wire, and coils, I have also replaced some vacuum lines, I've taken it to the dealer and they did a PSI test and it passed, they did a smoke test and it leaked from the intake manifold which I will replace this weekend also, but I feel that it might not fix the issue, the car run good at first start but when I accelerate to about 45 RPM it starts to idle and misfire, if I shut it off and turn it back on it start right up with no issues only up until I start to accelerate again it is an old car with a lot of miles, but other then the misfire i feel this car can go further. can anyone help?