Hi,Its been 1 month now that I got me. E92 320i - been loving the sweet smooth ride in pale comparison to my old Honda. However I noted that the fuel consumption for the car have increased since I got it from usual 8.7 l/100km to an average of 10.5l/100km despite my driving style that's been gentle on the peddle. I've also noted on a few occasions during the rush hour traffic on idle the car makes a pop sound coming from the rear exhaust.The idling sometimes do felt a bit rough. I've read some posts that this could be due to ignition coils and spark plugs that is faulty or misfiring. I was wondering if any fellow forum members here have similar experience and what is likely the costs of repairing them. Have scheduled a check up next week with Ingress but want to know what to expect.