Coolant loss and misfire......possible head gasket?

[ashevillemerc]

2002 e320 need some help figuring out my problem. My cars coolant light comes on every few days and I have to add coolant to it. The first time of the day that I start the car it puffs white smoke for a few seconds then clears up. I pressure tested it and it shows no sign of leak. I'm also having a cylinder 1 misfire issue in that I have replaced the plugs, wires coil and fuel injector for that cylinder. Still occasionally get the misfire code. My question is could I have a problem with my head gasket on the number 1 cylinder side causing both these issues, the loss of coolant it being burned out the exhaust and is it possible a bad head gasket could cause my misfire issue? I'm stumped all help is appreciated.