rcking

please help!! I have a 07 C280 while driving i got on the gas and the check engine light came on and the car was misfiring and smells like its running rich. checked the codes and got p0301,p0304 misfires on 1 and 4 and also p2300 and p2309 the control line to the ignition coil on cylinder 1 and 4 has a short circuit to ground. we have replaced the MAF sensor, plugs and coils on 1 and 4 and checked every ground we can find with no change