[Bimmer221]

So about a week ago I started intermittently getting the Service Engine Soon light with rough idling of my car and rough acceleration. It would start 5 min into the drive and then last for 10 min and go away. The car would hesitate like it wasnt getting gas or was having trouble shifting gears. I used a OBD II reader today and it was giving me the codes saying that cylinder 4 was misfiring. I'm assuming that means that my ignition coil is failing? Any other thoughts on this? I've already ordered new ignition coils/spark plugs to change them all out. The car is a 2009 328i with approximately 90,000 miles now. Is it still safe to drive to work as its my only mode of transportation or should i stay away from driving it. Could permanent engine damage have been caused by driving it?

Thanks!