I have not been driving the E46 for about a week. Most days, I have to start the car twice a day to change its position in the driveway to make room for other cars. The car never gets to run for more than 30 seconds. After a few days I was getting rough or inconsistent idle on start. Today, it threw a P0306, 6 cyl misfire. Car seems fine, other than a rough idle every few seconds or so. Do you guys predict a real problem? Or just symptoms from being driven only for very short amounts of time?