ML320 NO Injector Pulse

[WolF]

OK, I recently replaced the spark plugs, ignition wires, air filter, ignitioon coil packs, and camshaft sensor. Ignition coils were shorted out and burnt. Now I still have a miss in cylinders 4, 5, and 6. I checked the injectors for pulse and found that these three cylinders loose pulse anywhere from 3,000 RPMs and up. A Mercedes dealer said the ECM was bad, so I did the natural thing of having it replaced with a new one and reprogramed. Unfortunatly the problem still exists. I have checked the wiring from the cam sensor to the ecm and from the ecm to the injectors. All to no avail! Any ideas as to what is causing this problem would be appreciated!